./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:11:07,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:11:07,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:11:07,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:11:07,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:11:07,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:11:07,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:11:07,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:11:07,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:11:07,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:11:07,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:11:07,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:11:07,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:11:07,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:11:07,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:11:07,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:11:07,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:11:07,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:11:07,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:11:07,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:11:07,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:11:07,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:11:07,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:11:07,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:11:07,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:11:07,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:11:07,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:11:07,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:11:07,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:11:07,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:11:07,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:11:07,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:11:07,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:11:07,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:11:07,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:11:07,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:11:07,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:11:07,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:11:07,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:11:07,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:11:07,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:11:07,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:11:07,450 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:11:07,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:11:07,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:11:07,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:11:07,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:11:07,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:11:07,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:11:07,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:11:07,454 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:11:07,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:11:07,455 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:11:07,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:11:07,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:11:07,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:11:07,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:11:07,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:11:07,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:11:07,456 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:11:07,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:11:07,457 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:11:07,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:11:07,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:11:07,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:11:07,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:11:07,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:07,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:11:07,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:11:07,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:11:07,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:11:07,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:11:07,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:11:07,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:11:07,459 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:11:07,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:11:07,460 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:11:07,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:11:07,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:11:07,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:11:07,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:11:07,760 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:11:07,760 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:11:07,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-30 18:11:08,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:11:09,243 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:11:09,244 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-30 18:11:09,267 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/653eac864/493be4b483db47d5a9cf9062df194660/FLAG2b4676a4b [2023-08-30 18:11:09,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/653eac864/493be4b483db47d5a9cf9062df194660 [2023-08-30 18:11:09,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:11:09,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:11:09,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:09,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:11:09,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:11:09,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:09,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c5eb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09, skipping insertion in model container [2023-08-30 18:11:09,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:09,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:11:09,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:11:09,792 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-30 18:11:09,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:09,852 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:11:09,891 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-30 18:11:09,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:09,996 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:11:09,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09 WrapperNode [2023-08-30 18:11:09,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:09,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:09,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:11:09,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:11:10,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,043 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-08-30 18:11:10,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:10,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:11:10,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:11:10,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:11:10,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,068 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:11:10,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:11:10,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:11:10,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:11:10,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (1/1) ... [2023-08-30 18:11:10,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:10,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:11:10,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:11:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:11:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:11:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:11:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:11:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:11:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:11:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 18:11:10,139 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 18:11:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:11:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:11:10,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:11:10,141 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:11:10,266 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:11:10,268 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:11:10,553 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:11:10,572 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:11:10,572 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-30 18:11:10,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:10 BoogieIcfgContainer [2023-08-30 18:11:10,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:11:10,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:11:10,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:11:10,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:11:10,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:11:09" (1/3) ... [2023-08-30 18:11:10,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e3977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:10, skipping insertion in model container [2023-08-30 18:11:10,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:09" (2/3) ... [2023-08-30 18:11:10,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e3977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:10, skipping insertion in model container [2023-08-30 18:11:10,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:10" (3/3) ... [2023-08-30 18:11:10,581 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-30 18:11:10,588 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:11:10,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:11:10,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 18:11:10,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:11:10,700 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 18:11:10,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-08-30 18:11:10,820 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-08-30 18:11:10,820 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 18:11:10,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-30 18:11:10,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-08-30 18:11:10,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:10,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:10,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:10,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:10,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:10,922 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-08-30 18:11:10,923 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:10,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-30 18:11:10,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-08-30 18:11:13,520 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-08-30 18:11:13,520 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-30 18:11:13,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:11:13,539 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;@5d5fe3d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:13,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:11:13,542 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-30 18:11:13,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:13,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:13,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 18:11:13,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:13,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1355205613, now seen corresponding path program 1 times [2023-08-30 18:11:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:13,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981104320] [2023-08-30 18:11:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981104320] [2023-08-30 18:11:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981104320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:13,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040679383] [2023-08-30 18:11:13,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:13,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:13,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:13,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 357 [2023-08-30 18:11:13,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:13,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:13,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 357 [2023-08-30 18:11:13,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:14,017 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-08-30 18:11:14,018 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:14,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3057 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-08-30 18:11:14,022 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 18:11:14,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-30 18:11:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-30 18:11:14,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976657329598506 [2023-08-30 18:11:14,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-30 18:11:14,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-30 18:11:14,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:14,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-30 18:11:14,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,062 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 533 transitions. [2023-08-30 18:11:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-30 18:11:14,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:14,067 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-08-30 18:11:14,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-30 18:11:14,072 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-30 18:11:14,073 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-08-30 18:11:14,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:14,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:14,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:11:14,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:14,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1202044733, now seen corresponding path program 1 times [2023-08-30 18:11:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:14,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020198444] [2023-08-30 18:11:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:14,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:14,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020198444] [2023-08-30 18:11:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020198444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037847637] [2023-08-30 18:11:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:14,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:14,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:14,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:11:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 18:11:14,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:14,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:11:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037847637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:14,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:11:14,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 18:11:14,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474290593] [2023-08-30 18:11:14,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:14,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:14,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:14,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:11:14,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 357 [2023-08-30 18:11:14,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:14,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 357 [2023-08-30 18:11:14,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:14,411 INFO L130 PetriNetUnfolder]: 255/592 cut-off events. [2023-08-30 18:11:14,412 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:14,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3266 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-08-30 18:11:14,414 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-30 18:11:14,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-08-30 18:11:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-30 18:11:14,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2023-08-30 18:11:14,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-30 18:11:14,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-30 18:11:14,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:14,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-30 18:11:14,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,422 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 525 transitions. [2023-08-30 18:11:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-08-30 18:11:14,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:14,424 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-08-30 18:11:14,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 18:11:14,425 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-30 18:11:14,425 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-08-30 18:11:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:14,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:14,448 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 18:11:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:14,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:14,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash -96419517, now seen corresponding path program 1 times [2023-08-30 18:11:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730472796] [2023-08-30 18:11:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:14,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730472796] [2023-08-30 18:11:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730472796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:14,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349461443] [2023-08-30 18:11:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:14,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:14,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:14,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:14,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:11:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:14,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:14,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349461443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:14,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:14,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:11:14,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595923090] [2023-08-30 18:11:14,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:14,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:11:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:11:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:11:14,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-08-30 18:11:14,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 158.85714285714286) internal successors, (1112), 7 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:14,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:14,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-08-30 18:11:14,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:15,011 INFO L130 PetriNetUnfolder]: 271/599 cut-off events. [2023-08-30 18:11:15,012 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-30 18:11:15,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 599 events. 271/599 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2938 event pairs, 238 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 1149. Up to 513 conditions per place. [2023-08-30 18:11:15,015 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-30 18:11:15,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-08-30 18:11:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:11:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:11:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-30 18:11:15,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2023-08-30 18:11:15,018 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-30 18:11:15,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-30 18:11:15,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:15,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-30 18:11:15,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:15,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:15,027 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:15,027 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 984 transitions. [2023-08-30 18:11:15,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-08-30 18:11:15,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:11:15,030 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-08-30 18:11:15,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-30 18:11:15,032 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-30 18:11:15,033 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-08-30 18:11:15,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.85714285714286) internal successors, (1112), 7 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:15,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:15,034 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:15,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 18:11:15,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:15,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -888320147, now seen corresponding path program 2 times [2023-08-30 18:11:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047503160] [2023-08-30 18:11:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047503160] [2023-08-30 18:11:15,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047503160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:15,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719280017] [2023-08-30 18:11:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:11:15,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:15,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:15,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:11:15,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:11:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:11:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 18:11:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:15,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:11:15,578 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:11:15,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:11:15,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:11:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:11:15,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:11:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719280017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:15,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:11:15,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 18:11:15,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846184310] [2023-08-30 18:11:15,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:15,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:11:15,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:11:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:11:15,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 357 [2023-08-30 18:11:15,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 151.33333333333334) internal successors, (908), 6 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:15,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:15,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 357 [2023-08-30 18:11:15,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:16,000 INFO L130 PetriNetUnfolder]: 260/618 cut-off events. [2023-08-30 18:11:16,001 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 18:11:16,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 618 events. 260/618 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3247 event pairs, 31 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 1180. Up to 334 conditions per place. [2023-08-30 18:11:16,003 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 42 selfloop transitions, 6 changer transitions 25/81 dead transitions. [2023-08-30 18:11:16,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 357 flow [2023-08-30 18:11:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:11:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:11:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-08-30 18:11:16,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599439775910364 [2023-08-30 18:11:16,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-08-30 18:11:16,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-08-30 18:11:16,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:16,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-08-30 18:11:16,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,014 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 5 states and 821 transitions. [2023-08-30 18:11:16,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 357 flow [2023-08-30 18:11:16,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 343 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:16,017 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 145 flow [2023-08-30 18:11:16,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-30 18:11:16,018 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2023-08-30 18:11:16,018 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 145 flow [2023-08-30 18:11:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.33333333333334) internal successors, (908), 6 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:16,019 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:16,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:16,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:16,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:16,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1713486904, now seen corresponding path program 1 times [2023-08-30 18:11:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:16,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539930630] [2023-08-30 18:11:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:11:16,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539930630] [2023-08-30 18:11:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539930630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345354648] [2023-08-30 18:11:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:16,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:16,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:16,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:11:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:11:16,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345354648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:16,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 18:11:16,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133078540] [2023-08-30 18:11:16,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:11:16,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:11:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:11:16,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 357 [2023-08-30 18:11:16,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 145 flow. Second operand has 14 states, 14 states have (on average 156.21428571428572) internal successors, (2187), 14 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:16,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 357 [2023-08-30 18:11:16,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:16,622 INFO L130 PetriNetUnfolder]: 23/76 cut-off events. [2023-08-30 18:11:16,622 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2023-08-30 18:11:16,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 76 events. 23/76 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 141 event pairs, 0 based on Foata normal form. 18/91 useless extension candidates. Maximal degree in co-relation 155. Up to 46 conditions per place. [2023-08-30 18:11:16,623 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-30 18:11:16,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 234 flow [2023-08-30 18:11:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:11:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:11:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2202 transitions. [2023-08-30 18:11:16,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44057623049219685 [2023-08-30 18:11:16,630 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2202 transitions. [2023-08-30 18:11:16,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2202 transitions. [2023-08-30 18:11:16,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:16,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2202 transitions. [2023-08-30 18:11:16,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 157.28571428571428) internal successors, (2202), 14 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,643 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,643 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 145 flow. Second operand 14 states and 2202 transitions. [2023-08-30 18:11:16,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 234 flow [2023-08-30 18:11:16,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 213 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 18:11:16,645 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-30 18:11:16,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-30 18:11:16,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-30 18:11:16,646 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-30 18:11:16,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.21428571428572) internal successors, (2187), 14 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:16,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 18:11:16,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 18:11:16,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 18:11:16,659 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 18:11:16,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:16,857 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-30 18:11:16,859 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 18:11:16,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-08-30 18:11:16,879 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-08-30 18:11:16,880 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 18:11:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-30 18:11:16,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-08-30 18:11:16,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:16,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:16,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:16,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:16,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-08-30 18:11:16,908 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-08-30 18:11:16,909 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-30 18:11:16,914 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-08-30 18:11:19,263 INFO L134 LiptonReduction]: Checked pairs total: 17496 [2023-08-30 18:11:19,263 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 18:11:19,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:11:19,265 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;@5d5fe3d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:19,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:11:19,268 INFO L130 PetriNetUnfolder]: 7/31 cut-off events. [2023-08-30 18:11:19,268 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:19,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:19,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-30 18:11:19,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:19,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1690553009, now seen corresponding path program 1 times [2023-08-30 18:11:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:19,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741698557] [2023-08-30 18:11:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:19,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:19,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741698557] [2023-08-30 18:11:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741698557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:19,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:19,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:19,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686916887] [2023-08-30 18:11:19,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:19,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:19,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 355 [2023-08-30 18:11:19,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:19,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 355 [2023-08-30 18:11:19,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:19,393 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-08-30 18:11:19,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:19,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3050 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-08-30 18:11:19,395 INFO L137 encePairwiseOnDemand]: 330/355 looper letters, 20 selfloop transitions, 2 changer transitions 18/45 dead transitions. [2023-08-30 18:11:19,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-08-30 18:11:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-30 18:11:19,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004694835680751 [2023-08-30 18:11:19,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-30 18:11:19,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-30 18:11:19,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:19,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-30 18:11:19,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,402 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 533 transitions. [2023-08-30 18:11:19,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-08-30 18:11:19,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:19,405 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 69 flow [2023-08-30 18:11:19,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-08-30 18:11:19,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-30 18:11:19,406 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 69 flow [2023-08-30 18:11:19,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:19,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:19,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:11:19,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:19,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1112596279, now seen corresponding path program 1 times [2023-08-30 18:11:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412252323] [2023-08-30 18:11:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:19,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412252323] [2023-08-30 18:11:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412252323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:19,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096761660] [2023-08-30 18:11:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:19,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:19,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:19,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:11:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:19,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:19,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:19,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096761660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:19,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:19,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:11:19,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586596994] [2023-08-30 18:11:19,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:11:19,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:11:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:11:19,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 355 [2023-08-30 18:11:19,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:19,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 355 [2023-08-30 18:11:19,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:19,631 INFO L130 PetriNetUnfolder]: 47/129 cut-off events. [2023-08-30 18:11:19,631 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:19,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 129 events. 47/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 245. Up to 108 conditions per place. [2023-08-30 18:11:19,632 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-30 18:11:19,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-08-30 18:11:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:11:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:11:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 970 transitions. [2023-08-30 18:11:19,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45539906103286387 [2023-08-30 18:11:19,636 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 970 transitions. [2023-08-30 18:11:19,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 970 transitions. [2023-08-30 18:11:19,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:19,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 970 transitions. [2023-08-30 18:11:19,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,642 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,642 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 69 flow. Second operand 6 states and 970 transitions. [2023-08-30 18:11:19,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-08-30 18:11:19,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:19,643 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-08-30 18:11:19,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-30 18:11:19,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-08-30 18:11:19,644 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-08-30 18:11:19,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:19,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:19,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-30 18:11:19,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:19,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:19,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:19,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash -374883279, now seen corresponding path program 2 times [2023-08-30 18:11:19,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:19,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100577655] [2023-08-30 18:11:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:19,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100577655] [2023-08-30 18:11:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100577655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:19,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325232640] [2023-08-30 18:11:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:11:19,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:19,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:19,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:11:19,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:11:19,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:11:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:11:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:20,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:20,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325232640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:20,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:20,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 18:11:20,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737744145] [2023-08-30 18:11:20,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:20,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:11:20,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:11:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:11:20,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 355 [2023-08-30 18:11:20,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:20,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:20,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 355 [2023-08-30 18:11:20,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:20,147 INFO L130 PetriNetUnfolder]: 47/135 cut-off events. [2023-08-30 18:11:20,148 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 18:11:20,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 135 events. 47/135 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 236. Up to 108 conditions per place. [2023-08-30 18:11:20,149 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-30 18:11:20,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-08-30 18:11:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:11:20,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:11:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1921 transitions. [2023-08-30 18:11:20,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509389671361502 [2023-08-30 18:11:20,154 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1921 transitions. [2023-08-30 18:11:20,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1921 transitions. [2023-08-30 18:11:20,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:20,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1921 transitions. [2023-08-30 18:11:20,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.08333333333334) internal successors, (1921), 12 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:20,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 355.0) internal successors, (4615), 13 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:20,166 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 355.0) internal successors, (4615), 13 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:20,166 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1921 transitions. [2023-08-30 18:11:20,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-08-30 18:11:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:20,168 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-08-30 18:11:20,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-08-30 18:11:20,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-08-30 18:11:20,169 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-08-30 18:11:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:20,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:20,170 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 18:11:20,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:20,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:20,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 832355953, now seen corresponding path program 3 times [2023-08-30 18:11:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355093935] [2023-08-30 18:11:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:20,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:11:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:20,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:11:20,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:11:20,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:11:20,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:11:20,438 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-30 18:11:20,449 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:11:20,449 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:11:20,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 18:11:20,487 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:11:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-08-30 18:11:20,535 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-08-30 18:11:20,536 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 18:11:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-08-30 18:11:20,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-08-30 18:11:20,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-08-30 18:11:20,543 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:20,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-08-30 18:11:20,543 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-08-30 18:11:20,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-08-30 18:11:20,578 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-08-30 18:11:20,579 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 18:11:20,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-08-30 18:11:20,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-08-30 18:11:23,547 INFO L134 LiptonReduction]: Checked pairs total: 57444 [2023-08-30 18:11:23,547 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-30 18:11:23,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:11:23,549 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;@5d5fe3d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:23,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:11:23,551 INFO L130 PetriNetUnfolder]: 7/25 cut-off events. [2023-08-30 18:11:23,552 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:23,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:23,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 18:11:23,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:23,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:23,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1267872476, now seen corresponding path program 1 times [2023-08-30 18:11:23,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:23,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750312067] [2023-08-30 18:11:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:23,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750312067] [2023-08-30 18:11:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750312067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:23,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935993337] [2023-08-30 18:11:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:23,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:23,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 489 [2023-08-30 18:11:23,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:23,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:23,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 489 [2023-08-30 18:11:23,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:24,898 INFO L130 PetriNetUnfolder]: 10521/16515 cut-off events. [2023-08-30 18:11:24,898 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 18:11:24,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 16515 events. 10521/16515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 109597 event pairs, 9818 based on Foata normal form. 2499/16448 useless extension candidates. Maximal degree in co-relation 13969. Up to 15431 conditions per place. [2023-08-30 18:11:24,973 INFO L137 encePairwiseOnDemand]: 455/489 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-30 18:11:24,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-30 18:11:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 738 transitions. [2023-08-30 18:11:24,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030674846625767 [2023-08-30 18:11:24,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 738 transitions. [2023-08-30 18:11:24,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 738 transitions. [2023-08-30 18:11:24,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:24,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 738 transitions. [2023-08-30 18:11:24,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:24,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:24,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:24,982 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 738 transitions. [2023-08-30 18:11:24,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-30 18:11:24,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:24,985 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-08-30 18:11:24,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-30 18:11:24,986 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-30 18:11:24,987 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-08-30 18:11:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:24,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 18:11:24,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:24,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash 339768936, now seen corresponding path program 1 times [2023-08-30 18:11:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422587324] [2023-08-30 18:11:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:25,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:25,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422587324] [2023-08-30 18:11:25,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422587324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:25,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96169748] [2023-08-30 18:11:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:25,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:25,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:25,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:11:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:25,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 18:11:25,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:25,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:11:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96169748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:25,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:11:25,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 18:11:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141508126] [2023-08-30 18:11:25,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:25,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:25,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:11:25,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 489 [2023-08-30 18:11:25,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:25,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:25,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 489 [2023-08-30 18:11:25,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:26,305 INFO L130 PetriNetUnfolder]: 10399/16491 cut-off events. [2023-08-30 18:11:26,305 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-08-30 18:11:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32041 conditions, 16491 events. 10399/16491 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 111617 event pairs, 4650 based on Foata normal form. 0/13963 useless extension candidates. Maximal degree in co-relation 32028. Up to 15399 conditions per place. [2023-08-30 18:11:26,373 INFO L137 encePairwiseOnDemand]: 486/489 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-30 18:11:26,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-08-30 18:11:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-30 18:11:26,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49352419904567146 [2023-08-30 18:11:26,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-30 18:11:26,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-30 18:11:26,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:26,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-30 18:11:26,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:26,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:26,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:26,381 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 724 transitions. [2023-08-30 18:11:26,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-08-30 18:11:26,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:26,385 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-08-30 18:11:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-30 18:11:26,387 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-30 18:11:26,387 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-08-30 18:11:26,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:26,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:26,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:26,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:26,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:26,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:26,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash -953345288, now seen corresponding path program 1 times [2023-08-30 18:11:26,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:26,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143134256] [2023-08-30 18:11:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:26,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:26,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143134256] [2023-08-30 18:11:26,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143134256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:26,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445125995] [2023-08-30 18:11:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:26,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:26,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:26,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:26,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 18:11:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:26,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:26,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:26,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445125995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:26,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:26,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:11:26,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055565881] [2023-08-30 18:11:26,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:26,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:11:26,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:11:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:11:26,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 489 [2023-08-30 18:11:26,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:26,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:26,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 489 [2023-08-30 18:11:26,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:27,936 INFO L130 PetriNetUnfolder]: 10623/16504 cut-off events. [2023-08-30 18:11:27,936 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-08-30 18:11:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 108095 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-08-30 18:11:27,984 INFO L137 encePairwiseOnDemand]: 486/489 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-30 18:11:27,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-08-30 18:11:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:11:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:11:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2023-08-30 18:11:27,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614860259032038 [2023-08-30 18:11:27,989 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2023-08-30 18:11:27,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2023-08-30 18:11:27,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:27,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2023-08-30 18:11:27,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:27,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:27,997 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1354 transitions. [2023-08-30 18:11:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-08-30 18:11:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:27,999 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-08-30 18:11:27,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-30 18:11:28,000 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-08-30 18:11:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-08-30 18:11:28,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.0) internal successors, (1519), 7 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:28,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:28,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 18:11:28,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:28,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1739017580, now seen corresponding path program 2 times [2023-08-30 18:11:28,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:28,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934916148] [2023-08-30 18:11:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:28,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:28,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934916148] [2023-08-30 18:11:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934916148] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397469748] [2023-08-30 18:11:28,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:11:28,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:28,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:28,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 18:11:28,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:11:28,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:11:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 18:11:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:11:28,408 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:11:28,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:11:28,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:11:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:11:28,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:11:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397469748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:28,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:11:28,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 18:11:28,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588174137] [2023-08-30 18:11:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:28,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:11:28,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:11:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:11:28,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 489 [2023-08-30 18:11:28,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:28,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:28,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 489 [2023-08-30 18:11:28,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:29,752 INFO L130 PetriNetUnfolder]: 10764/16984 cut-off events. [2023-08-30 18:11:29,752 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-08-30 18:11:29,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33923 conditions, 16984 events. 10764/16984 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 115318 event pairs, 2807 based on Foata normal form. 0/14965 useless extension candidates. Maximal degree in co-relation 33887. Up to 12964 conditions per place. [2023-08-30 18:11:29,813 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 123 selfloop transitions, 14 changer transitions 14/163 dead transitions. [2023-08-30 18:11:29,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 163 transitions, 721 flow [2023-08-30 18:11:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:11:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:11:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1388 transitions. [2023-08-30 18:11:29,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730743012951602 [2023-08-30 18:11:29,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1388 transitions. [2023-08-30 18:11:29,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1388 transitions. [2023-08-30 18:11:29,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:29,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1388 transitions. [2023-08-30 18:11:29,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:29,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:29,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:29,825 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1388 transitions. [2023-08-30 18:11:29,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 163 transitions, 721 flow [2023-08-30 18:11:29,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 163 transitions, 707 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:29,829 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2023-08-30 18:11:29,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-30 18:11:29,829 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-08-30 18:11:29,830 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2023-08-30 18:11:29,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:29,830 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:29,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 18:11:30,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:30,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1058932086, now seen corresponding path program 1 times [2023-08-30 18:11:30,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:30,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007426817] [2023-08-30 18:11:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:30,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:11:30,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:30,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007426817] [2023-08-30 18:11:30,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007426817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:30,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088467064] [2023-08-30 18:11:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:30,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:30,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:30,096 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:30,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 18:11:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:11:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:30,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:30,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088467064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:30,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:30,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 18:11:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991023793] [2023-08-30 18:11:30,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:30,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:11:30,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:11:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:11:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 489 [2023-08-30 18:11:30,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 14 states, 14 states have (on average 214.35714285714286) internal successors, (3001), 14 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:30,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:30,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 489 [2023-08-30 18:11:30,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:31,582 INFO L130 PetriNetUnfolder]: 10535/17459 cut-off events. [2023-08-30 18:11:31,582 INFO L131 PetriNetUnfolder]: For 5519/5519 co-relation queries the response was YES. [2023-08-30 18:11:31,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38652 conditions, 17459 events. 10535/17459 cut-off events. For 5519/5519 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 127423 event pairs, 178 based on Foata normal form. 23/16526 useless extension candidates. Maximal degree in co-relation 38593. Up to 15345 conditions per place. [2023-08-30 18:11:31,649 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 118 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2023-08-30 18:11:31,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 144 transitions, 735 flow [2023-08-30 18:11:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:11:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:11:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3091 transitions. [2023-08-30 18:11:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45150452819164477 [2023-08-30 18:11:31,661 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3091 transitions. [2023-08-30 18:11:31,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3091 transitions. [2023-08-30 18:11:31,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:31,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3091 transitions. [2023-08-30 18:11:31,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 220.78571428571428) internal successors, (3091), 14 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:31,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:31,678 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:31,679 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 14 states and 3091 transitions. [2023-08-30 18:11:31,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 144 transitions, 735 flow [2023-08-30 18:11:31,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 144 transitions, 735 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:31,692 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 363 flow [2023-08-30 18:11:31,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=363, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2023-08-30 18:11:31,693 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 34 predicate places. [2023-08-30 18:11:31,693 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 363 flow [2023-08-30 18:11:31,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 214.35714285714286) internal successors, (3001), 14 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:31,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:31,695 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:31,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:31,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 18:11:31,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:31,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:31,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1799710142, now seen corresponding path program 1 times [2023-08-30 18:11:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290788003] [2023-08-30 18:11:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:11:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290788003] [2023-08-30 18:11:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290788003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:32,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:11:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264229706] [2023-08-30 18:11:32,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:32,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:11:32,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:11:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:11:32,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 489 [2023-08-30 18:11:32,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 199.4) internal successors, (997), 5 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:32,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:32,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 489 [2023-08-30 18:11:32,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:33,189 INFO L130 PetriNetUnfolder]: 5586/10233 cut-off events. [2023-08-30 18:11:33,190 INFO L131 PetriNetUnfolder]: For 3774/3774 co-relation queries the response was YES. [2023-08-30 18:11:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23773 conditions, 10233 events. 5586/10233 cut-off events. For 3774/3774 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 75538 event pairs, 2154 based on Foata normal form. 1470/10806 useless extension candidates. Maximal degree in co-relation 23700. Up to 5369 conditions per place. [2023-08-30 18:11:33,231 INFO L137 encePairwiseOnDemand]: 468/489 looper letters, 116 selfloop transitions, 21 changer transitions 2/149 dead transitions. [2023-08-30 18:11:33,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 149 transitions, 840 flow [2023-08-30 18:11:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 898 transitions. [2023-08-30 18:11:33,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591002044989775 [2023-08-30 18:11:33,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 898 transitions. [2023-08-30 18:11:33,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 898 transitions. [2023-08-30 18:11:33,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:33,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 898 transitions. [2023-08-30 18:11:33,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:33,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:33,239 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:33,239 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 363 flow. Second operand 4 states and 898 transitions. [2023-08-30 18:11:33,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 149 transitions, 840 flow [2023-08-30 18:11:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 767 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-08-30 18:11:33,254 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 399 flow [2023-08-30 18:11:33,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=399, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2023-08-30 18:11:33,255 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2023-08-30 18:11:33,255 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 399 flow [2023-08-30 18:11:33,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.4) internal successors, (997), 5 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:33,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:33,256 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 18:11:33,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:33,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash 641537200, now seen corresponding path program 1 times [2023-08-30 18:11:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579205044] [2023-08-30 18:11:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:33,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:36,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579205044] [2023-08-30 18:11:36,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579205044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487412020] [2023-08-30 18:11:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:36,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:36,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:36,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 18:11:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:11:36,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:36,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:11:36,915 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:11:36,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:11:36,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:11:36,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:11:37,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:11:37,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:11:37,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:11:37,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:11:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:11:37,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:11:37,262 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:11:37,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:11:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:11:37,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:37,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:11:37,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:11:37,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:11:37,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:11:37,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:12:02,008 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((v_ArrVal_458 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_77| Int)) (or (forall ((|v_t_funThread1of2ForFork0_~i~0#1_87| Int) (v_ArrVal_463 Int) (|~#a~0.offset| Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_458) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_87| 28) |~#a~0.offset|) v_ArrVal_463) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_77| 28) |~#a~0.offset|)) 0) (= |v_t_funThread2of2ForFork0_~i~0#1_77| |v_t_funThread1of2ForFork0_~i~0#1_87|))) (< |v_t_funThread2of2ForFork0_~i~0#1_77| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_77|)))) is different from false [2023-08-30 18:12:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:12:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487412020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:05,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 30 [2023-08-30 18:12:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457183140] [2023-08-30 18:12:05,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:05,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:12:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:12:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=701, Unknown=9, NotChecked=58, Total=992 [2023-08-30 18:12:06,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 489 [2023-08-30 18:12:06,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 399 flow. Second operand has 32 states, 32 states have (on average 143.875) internal successors, (4604), 32 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:06,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:06,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 489 [2023-08-30 18:12:06,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:09,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:12:10,693 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_77| Int) (v_ArrVal_464 (Array Int Int))) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_77| 28))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_77| 1) (not (= 0 (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_464) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_77|) (= (select .cse1 (+ .cse0 |c_~#a~0.offset|)) 0)))) (forall ((v_ArrVal_463 Int) (|v_t_funThread2of2ForFork0_~i~0#1_77| Int) (v_ArrVal_464 (Array Int Int))) (let ((.cse2 (* |v_t_funThread2of2ForFork0_~i~0#1_77| 28))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_77| 1) (not (= 0 (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_464) |c_~#a~0.base|) (+ .cse2 |c_~#a~0.offset| (- 24))))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_77|) (= (select (store .cse1 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) v_ArrVal_463) (+ .cse2 |c_~#a~0.offset|)) 0)))))) is different from false [2023-08-30 18:12:14,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:12:18,575 INFO L130 PetriNetUnfolder]: 8313/15102 cut-off events. [2023-08-30 18:12:18,576 INFO L131 PetriNetUnfolder]: For 8260/8292 co-relation queries the response was YES. [2023-08-30 18:12:18,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41446 conditions, 15102 events. 8313/15102 cut-off events. For 8260/8292 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 118303 event pairs, 1181 based on Foata normal form. 56/13835 useless extension candidates. Maximal degree in co-relation 40293. Up to 7651 conditions per place. [2023-08-30 18:12:18,663 INFO L137 encePairwiseOnDemand]: 458/489 looper letters, 308 selfloop transitions, 119 changer transitions 126/562 dead transitions. [2023-08-30 18:12:18,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 562 transitions, 3200 flow [2023-08-30 18:12:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 18:12:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 18:12:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5038 transitions. [2023-08-30 18:12:18,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32195807770961143 [2023-08-30 18:12:18,674 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5038 transitions. [2023-08-30 18:12:18,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5038 transitions. [2023-08-30 18:12:18,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:18,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5038 transitions. [2023-08-30 18:12:18,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 157.4375) internal successors, (5038), 32 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:18,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 489.0) internal successors, (16137), 33 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:18,708 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 489.0) internal successors, (16137), 33 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:18,708 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 399 flow. Second operand 32 states and 5038 transitions. [2023-08-30 18:12:18,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 562 transitions, 3200 flow [2023-08-30 18:12:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 562 transitions, 3199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:12:18,737 INFO L231 Difference]: Finished difference. Result has 139 places, 203 transitions, 1242 flow [2023-08-30 18:12:18,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1242, PETRI_PLACES=139, PETRI_TRANSITIONS=203} [2023-08-30 18:12:18,738 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 71 predicate places. [2023-08-30 18:12:18,739 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 203 transitions, 1242 flow [2023-08-30 18:12:18,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.875) internal successors, (4604), 32 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:18,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:18,740 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:18,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:18,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 18:12:18,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:18,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1241005934, now seen corresponding path program 2 times [2023-08-30 18:12:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618151939] [2023-08-30 18:12:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:18,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:12:19,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:19,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618151939] [2023-08-30 18:12:19,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618151939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:19,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959980591] [2023-08-30 18:12:19,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:12:19,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:19,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:12:19,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 18:12:19,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:12:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:12:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 18:12:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:19,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:12:19,620 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:12:19,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:12:19,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:12:19,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:12:19,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:12:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:12:19,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:12:19,797 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:12:19,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:12:19,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:12:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:12:19,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:19,962 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_548 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_548) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset| (- 24))) 0))) (forall ((v_ArrVal_548 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_79| Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_79| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_548) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0))))) is different from false [2023-08-30 18:12:19,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:12:19,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:12:19,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:12:19,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:12:20,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:12:20,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:12:20,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:12:20,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2023-08-30 18:12:32,079 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_545 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_79| Int) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_545) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_79| 28) |~#a~0.offset|)) 0)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-30 18:12:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:12:34,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959980591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:34,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:34,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 18:12:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032674730] [2023-08-30 18:12:34,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:12:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:12:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=254, Unknown=4, NotChecked=70, Total=420 [2023-08-30 18:12:34,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-08-30 18:12:34,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 203 transitions, 1242 flow. Second operand has 21 states, 21 states have (on average 151.33333333333334) internal successors, (3178), 21 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:34,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:34,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-08-30 18:12:34,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:39,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:12:41,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:12:44,850 INFO L130 PetriNetUnfolder]: 11214/20550 cut-off events. [2023-08-30 18:12:44,850 INFO L131 PetriNetUnfolder]: For 52318/52350 co-relation queries the response was YES. [2023-08-30 18:12:44,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77485 conditions, 20550 events. 11214/20550 cut-off events. For 52318/52350 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 171513 event pairs, 2518 based on Foata normal form. 56/18686 useless extension candidates. Maximal degree in co-relation 75775. Up to 10077 conditions per place. [2023-08-30 18:12:44,948 INFO L137 encePairwiseOnDemand]: 473/489 looper letters, 330 selfloop transitions, 98 changer transitions 115/552 dead transitions. [2023-08-30 18:12:44,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 552 transitions, 4247 flow [2023-08-30 18:12:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:12:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:12:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2612 transitions. [2023-08-30 18:12:44,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35610088616223584 [2023-08-30 18:12:44,952 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2612 transitions. [2023-08-30 18:12:44,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2612 transitions. [2023-08-30 18:12:44,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:44,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2612 transitions. [2023-08-30 18:12:44,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 174.13333333333333) internal successors, (2612), 15 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,963 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,964 INFO L175 Difference]: Start difference. First operand has 139 places, 203 transitions, 1242 flow. Second operand 15 states and 2612 transitions. [2023-08-30 18:12:44,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 552 transitions, 4247 flow [2023-08-30 18:12:45,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 552 transitions, 4221 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-08-30 18:12:45,308 INFO L231 Difference]: Finished difference. Result has 149 places, 241 transitions, 1763 flow [2023-08-30 18:12:45,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1763, PETRI_PLACES=149, PETRI_TRANSITIONS=241} [2023-08-30 18:12:45,309 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 81 predicate places. [2023-08-30 18:12:45,309 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 241 transitions, 1763 flow [2023-08-30 18:12:45,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 151.33333333333334) internal successors, (3178), 21 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:45,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:45,310 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:45,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 18:12:45,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:45,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1900505865, now seen corresponding path program 1 times [2023-08-30 18:12:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275397649] [2023-08-30 18:12:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:12:45,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:45,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275397649] [2023-08-30 18:12:45,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275397649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:45,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282758035] [2023-08-30 18:12:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:45,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:45,821 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:12:45,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 18:12:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:45,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:12:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:45,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:12:46,015 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:12:46,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:12:46,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:12:46,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:12:46,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:12:46,140 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:12:46,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:12:46,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:12:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:12:46,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:46,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:12:46,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-08-30 18:12:50,437 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_91| Int) (|~#a~0.offset| Int) (v_ArrVal_631 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_631) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_91| 28) |~#a~0.offset|)) 0)) is different from false [2023-08-30 18:12:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:12:50,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282758035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:50,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:50,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-30 18:12:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567732196] [2023-08-30 18:12:50,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:50,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:12:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:12:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=171, Unknown=3, NotChecked=28, Total=272 [2023-08-30 18:12:50,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-08-30 18:12:50,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 241 transitions, 1763 flow. Second operand has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:50,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:50,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-08-30 18:12:50,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:53,660 INFO L130 PetriNetUnfolder]: 13651/25160 cut-off events. [2023-08-30 18:12:53,660 INFO L131 PetriNetUnfolder]: For 83615/83645 co-relation queries the response was YES. [2023-08-30 18:12:53,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100714 conditions, 25160 events. 13651/25160 cut-off events. For 83615/83645 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 218706 event pairs, 3374 based on Foata normal form. 53/22926 useless extension candidates. Maximal degree in co-relation 98368. Up to 12933 conditions per place. [2023-08-30 18:12:53,823 INFO L137 encePairwiseOnDemand]: 469/489 looper letters, 356 selfloop transitions, 94 changer transitions 141/600 dead transitions. [2023-08-30 18:12:53,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 600 transitions, 5106 flow [2023-08-30 18:12:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:12:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:12:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2479 transitions. [2023-08-30 18:12:53,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362109260882267 [2023-08-30 18:12:53,828 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2479 transitions. [2023-08-30 18:12:53,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2479 transitions. [2023-08-30 18:12:53,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:53,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2479 transitions. [2023-08-30 18:12:53,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 177.07142857142858) internal successors, (2479), 14 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,838 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,838 INFO L175 Difference]: Start difference. First operand has 149 places, 241 transitions, 1763 flow. Second operand 14 states and 2479 transitions. [2023-08-30 18:12:53,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 600 transitions, 5106 flow [2023-08-30 18:12:54,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 600 transitions, 5098 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:54,629 INFO L231 Difference]: Finished difference. Result has 171 places, 277 transitions, 2435 flow [2023-08-30 18:12:54,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2435, PETRI_PLACES=171, PETRI_TRANSITIONS=277} [2023-08-30 18:12:54,629 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 103 predicate places. [2023-08-30 18:12:54,630 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 277 transitions, 2435 flow [2023-08-30 18:12:54,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:54,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:54,631 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:54,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:54,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 18:12:54,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:12:54,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1405618938, now seen corresponding path program 3 times [2023-08-30 18:12:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:54,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082497369] [2023-08-30 18:12:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:54,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:12:55,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082497369] [2023-08-30 18:12:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082497369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661628728] [2023-08-30 18:12:55,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:12:55,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:55,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:55,125 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:12:55,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 18:12:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:12:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:12:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 18:12:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:55,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:12:55,446 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-08-30 18:12:55,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-08-30 18:12:55,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:12:55,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:12:55,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:12:55,594 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:12:55,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:12:55,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:12:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:12:55,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:55,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:12:55,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-08-30 18:12:59,810 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_~i~0#1_83| Int) (v_ArrVal_716 (Array Int Int)) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_716) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_83| 28) |~#a~0.offset|)) 0)) is different from false [2023-08-30 18:12:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:12:59,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661628728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:59,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:59,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 18:12:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374758714] [2023-08-30 18:12:59,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:12:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:12:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=194, Unknown=3, NotChecked=30, Total=306 [2023-08-30 18:13:00,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-08-30 18:13:00,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 277 transitions, 2435 flow. Second operand has 18 states, 18 states have (on average 151.61111111111111) internal successors, (2729), 18 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:00,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:00,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-08-30 18:13:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:04,437 INFO L130 PetriNetUnfolder]: 14938/27779 cut-off events. [2023-08-30 18:13:04,437 INFO L131 PetriNetUnfolder]: For 138139/138199 co-relation queries the response was YES. [2023-08-30 18:13:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121460 conditions, 27779 events. 14938/27779 cut-off events. For 138139/138199 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 246869 event pairs, 3820 based on Foata normal form. 56/25345 useless extension candidates. Maximal degree in co-relation 118961. Up to 15584 conditions per place. [2023-08-30 18:13:04,633 INFO L137 encePairwiseOnDemand]: 472/489 looper letters, 367 selfloop transitions, 102 changer transitions 127/605 dead transitions. [2023-08-30 18:13:04,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 605 transitions, 5992 flow [2023-08-30 18:13:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:13:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:13:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2273 transitions. [2023-08-30 18:13:04,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575585968224005 [2023-08-30 18:13:04,636 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2273 transitions. [2023-08-30 18:13:04,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2273 transitions. [2023-08-30 18:13:04,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:04,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2273 transitions. [2023-08-30 18:13:04,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 174.84615384615384) internal successors, (2273), 13 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,644 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,644 INFO L175 Difference]: Start difference. First operand has 171 places, 277 transitions, 2435 flow. Second operand 13 states and 2273 transitions. [2023-08-30 18:13:04,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 605 transitions, 5992 flow [2023-08-30 18:13:06,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 605 transitions, 5792 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 18:13:06,167 INFO L231 Difference]: Finished difference. Result has 182 places, 307 transitions, 2980 flow [2023-08-30 18:13:06,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2980, PETRI_PLACES=182, PETRI_TRANSITIONS=307} [2023-08-30 18:13:06,168 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2023-08-30 18:13:06,168 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 307 transitions, 2980 flow [2023-08-30 18:13:06,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.61111111111111) internal successors, (2729), 18 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:06,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:06,169 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:06,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:06,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:13:06,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1913033255, now seen corresponding path program 2 times [2023-08-30 18:13:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787162552] [2023-08-30 18:13:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:06,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:13:06,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:06,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787162552] [2023-08-30 18:13:06,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787162552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:06,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73179683] [2023-08-30 18:13:06,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:06,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:06,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:06,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:13:06,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 18:13:06,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:06,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:13:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:06,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:13:07,012 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-08-30 18:13:07,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-08-30 18:13:07,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:13:07,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:13:07,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:13:07,209 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:13:07,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:13:07,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:13:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:13:07,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:07,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:13:07,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-08-30 18:13:13,481 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_801 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_95| Int)) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_801) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_95| 28) |~#a~0.offset|)))) is different from false [2023-08-30 18:13:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:13:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73179683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:13,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 18:13:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29528739] [2023-08-30 18:13:13,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:13:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:13:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=192, Unknown=3, NotChecked=30, Total=306 [2023-08-30 18:13:13,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-08-30 18:13:13,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 307 transitions, 2980 flow. Second operand has 18 states, 18 states have (on average 151.61111111111111) internal successors, (2729), 18 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:13,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:13,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-08-30 18:13:13,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:23,246 INFO L130 PetriNetUnfolder]: 16549/31005 cut-off events. [2023-08-30 18:13:23,247 INFO L131 PetriNetUnfolder]: For 166163/166243 co-relation queries the response was YES. [2023-08-30 18:13:23,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136997 conditions, 31005 events. 16549/31005 cut-off events. For 166163/166243 co-relation queries the response was YES. Maximal size of possible extension queue 1263. Compared 283011 event pairs, 4100 based on Foata normal form. 63/28342 useless extension candidates. Maximal degree in co-relation 134783. Up to 16202 conditions per place. [2023-08-30 18:13:23,445 INFO L137 encePairwiseOnDemand]: 469/489 looper letters, 417 selfloop transitions, 113 changer transitions 112/651 dead transitions. [2023-08-30 18:13:23,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 651 transitions, 6523 flow [2023-08-30 18:13:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:13:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:13:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2792 transitions. [2023-08-30 18:13:23,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35685071574642124 [2023-08-30 18:13:23,449 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2792 transitions. [2023-08-30 18:13:23,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2792 transitions. [2023-08-30 18:13:23,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:23,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2792 transitions. [2023-08-30 18:13:23,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 174.5) internal successors, (2792), 16 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:23,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:23,457 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:23,457 INFO L175 Difference]: Start difference. First operand has 182 places, 307 transitions, 2980 flow. Second operand 16 states and 2792 transitions. [2023-08-30 18:13:23,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 651 transitions, 6523 flow [2023-08-30 18:13:24,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 651 transitions, 6359 flow, removed 47 selfloop flow, removed 2 redundant places. [2023-08-30 18:13:24,620 INFO L231 Difference]: Finished difference. Result has 202 places, 326 transitions, 3523 flow [2023-08-30 18:13:24,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3523, PETRI_PLACES=202, PETRI_TRANSITIONS=326} [2023-08-30 18:13:24,621 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 134 predicate places. [2023-08-30 18:13:24,621 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 326 transitions, 3523 flow [2023-08-30 18:13:24,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.61111111111111) internal successors, (2729), 18 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:24,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:24,622 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:24,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:24,822 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:13:24,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1333605401, now seen corresponding path program 3 times [2023-08-30 18:13:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:24,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993489101] [2023-08-30 18:13:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:13:25,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993489101] [2023-08-30 18:13:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993489101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758339508] [2023-08-30 18:13:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:13:25,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:25,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:13:25,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 18:13:25,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:13:25,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:13:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:25,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:13:25,650 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:13:25,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:13:25,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:13:25,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:13:25,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:13:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:25,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:13:25,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:13:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:13:25,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:13:25,869 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:13:25,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:13:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:13:25,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:26,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:13:26,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:13:26,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:13:26,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:13:26,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:13:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:13:40,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758339508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:40,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:40,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-08-30 18:13:40,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610612151] [2023-08-30 18:13:40,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:13:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:13:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=324, Unknown=6, NotChecked=0, Total=462 [2023-08-30 18:13:40,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 489 [2023-08-30 18:13:40,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 326 transitions, 3523 flow. Second operand has 22 states, 22 states have (on average 149.27272727272728) internal successors, (3284), 22 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:40,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:40,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 489 [2023-08-30 18:13:40,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:43,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:13:45,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:13:54,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:13:56,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 18:13:59,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 18:14:03,451 INFO L130 PetriNetUnfolder]: 17696/33267 cut-off events. [2023-08-30 18:14:03,451 INFO L131 PetriNetUnfolder]: For 195307/195431 co-relation queries the response was YES. [2023-08-30 18:14:03,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149362 conditions, 33267 events. 17696/33267 cut-off events. For 195307/195431 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 308780 event pairs, 3428 based on Foata normal form. 63/30393 useless extension candidates. Maximal degree in co-relation 147131. Up to 17195 conditions per place. [2023-08-30 18:14:03,734 INFO L137 encePairwiseOnDemand]: 461/489 looper letters, 447 selfloop transitions, 228 changer transitions 114/798 dead transitions. [2023-08-30 18:14:03,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 798 transitions, 8807 flow [2023-08-30 18:14:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 18:14:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 18:14:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3574 transitions. [2023-08-30 18:14:03,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3480377836206057 [2023-08-30 18:14:03,739 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3574 transitions. [2023-08-30 18:14:03,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3574 transitions. [2023-08-30 18:14:03,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:14:03,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3574 transitions. [2023-08-30 18:14:03,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 170.1904761904762) internal successors, (3574), 21 states have internal predecessors, (3574), 0 states have call successors, (0), 0 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 18:14:03,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 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 18:14:03,880 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 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 18:14:03,880 INFO L175 Difference]: Start difference. First operand has 202 places, 326 transitions, 3523 flow. Second operand 21 states and 3574 transitions. [2023-08-30 18:14:03,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 798 transitions, 8807 flow [2023-08-30 18:14:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 798 transitions, 8229 flow, removed 210 selfloop flow, removed 7 redundant places. [2023-08-30 18:14:05,888 INFO L231 Difference]: Finished difference. Result has 225 places, 433 transitions, 5281 flow [2023-08-30 18:14:05,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3167, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5281, PETRI_PLACES=225, PETRI_TRANSITIONS=433} [2023-08-30 18:14:05,888 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 157 predicate places. [2023-08-30 18:14:05,888 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 433 transitions, 5281 flow [2023-08-30 18:14:05,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 149.27272727272728) internal successors, (3284), 22 states have internal predecessors, (3284), 0 states have call successors, (0), 0 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 18:14:05,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:14:05,889 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:14:05,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 18:14:06,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:06,090 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:14:06,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:14:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1672823788, now seen corresponding path program 4 times [2023-08-30 18:14:06,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:14:06,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939558293] [2023-08-30 18:14:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:06,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:14:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:06,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:14:06,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939558293] [2023-08-30 18:14:06,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939558293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:14:06,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763145901] [2023-08-30 18:14:06,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:14:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:14:06,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:14:06,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 18:14:06,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:14:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:14:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:14:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:14:06,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:14:06,852 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:14:06,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:14:06,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:14:06,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:14:06,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:14:06,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:14:07,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:14:07,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:14:07,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:14:07,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 18:14:07,151 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:14:07,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:14:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:07,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:14:07,331 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_979 (Array Int Int)) (v_ArrVal_978 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_89| Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_978) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|)))) is different from false [2023-08-30 18:14:07,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:14:07,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:14:07,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:14:07,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:14:07,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:14:09,545 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (or (forall ((|v_t_funThread1of2ForFork0_~i~0#1_99| Int) (v_ArrVal_979 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread2of2ForFork0_~i~0#1_89| Int) (v_ArrVal_976 Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread1of2ForFork0_~i~0#1_99| 28) |~#a~0.offset|) v_ArrVal_976)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_89| Int)) (or (forall ((|v_t_funThread1of2ForFork0_~i~0#1_99| Int) (v_ArrVal_979 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_976 Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread1of2ForFork0_~i~0#1_99| 28) |~#a~0.offset|) v_ArrVal_976)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28) |~#a~0.offset|)) 0) (= |v_t_funThread2of2ForFork0_~i~0#1_89| |v_t_funThread1of2ForFork0_~i~0#1_99|))) (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|))))) is different from false [2023-08-30 18:14:11,678 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_89| Int) (v_ArrVal_972 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_99| Int) (v_ArrVal_979 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_976 Int)) (or (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_972))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_99| 28) |~#a~0.offset|) v_ArrVal_976))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28) |~#a~0.offset|)) 0) (= |v_t_funThread2of2ForFork0_~i~0#1_89| |v_t_funThread1of2ForFork0_~i~0#1_99|))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|))) (or (forall ((|v_t_funThread1of2ForFork0_~i~0#1_99| Int) (v_ArrVal_979 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread2of2ForFork0_~i~0#1_89| Int) (v_ArrVal_976 Int) (v_ArrVal_972 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_972))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_99| 28) |~#a~0.offset|) v_ArrVal_976))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)))) is different from false [2023-08-30 18:14:19,778 WARN L222 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:14:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-30 18:14:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763145901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:14:20,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:14:20,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2023-08-30 18:14:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232464225] [2023-08-30 18:14:20,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:14:20,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:14:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:14:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:14:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=312, Unknown=5, NotChecked=120, Total=552 [2023-08-30 18:14:20,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 489 [2023-08-30 18:14:20,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 433 transitions, 5281 flow. Second operand has 24 states, 24 states have (on average 149.125) internal successors, (3579), 24 states have internal predecessors, (3579), 0 states have call successors, (0), 0 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 18:14:20,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:14:20,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 489 [2023-08-30 18:14:20,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:14:22,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:14:24,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:14:26,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:14:27,362 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_979 (Array Int Int)) (v_ArrVal_978 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_89| Int) (v_ArrVal_976 Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) v_ArrVal_976)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_978) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|)))) (forall ((v_ArrVal_979 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_89| Int)) (let ((.cse1 (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_979) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse1)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|) (not (= (select (select |c_#pthreadsMutex| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse1 (- 24))) 0)))))) is different from false [2023-08-30 18:14:29,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:14:31,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:14:33,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:14:36,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:14:43,155 INFO L130 PetriNetUnfolder]: 18197/34516 cut-off events. [2023-08-30 18:14:43,155 INFO L131 PetriNetUnfolder]: For 248158/248350 co-relation queries the response was YES. [2023-08-30 18:14:43,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174038 conditions, 34516 events. 18197/34516 cut-off events. For 248158/248350 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 325823 event pairs, 3356 based on Foata normal form. 53/31527 useless extension candidates. Maximal degree in co-relation 171797. Up to 19762 conditions per place. [2023-08-30 18:14:43,521 INFO L137 encePairwiseOnDemand]: 462/489 looper letters, 487 selfloop transitions, 210 changer transitions 151/857 dead transitions. [2023-08-30 18:14:43,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 857 transitions, 10411 flow [2023-08-30 18:14:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:14:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:14:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3705 transitions. [2023-08-30 18:14:43,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34439486893474625 [2023-08-30 18:14:43,527 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3705 transitions. [2023-08-30 18:14:43,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3705 transitions. [2023-08-30 18:14:43,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:14:43,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3705 transitions. [2023-08-30 18:14:43,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 168.4090909090909) internal successors, (3705), 22 states have internal predecessors, (3705), 0 states have call successors, (0), 0 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 18:14:43,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:14:43,540 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:14:43,540 INFO L175 Difference]: Start difference. First operand has 225 places, 433 transitions, 5281 flow. Second operand 22 states and 3705 transitions. [2023-08-30 18:14:43,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 857 transitions, 10411 flow [2023-08-30 18:14:47,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 857 transitions, 9852 flow, removed 219 selfloop flow, removed 6 redundant places. [2023-08-30 18:14:47,405 INFO L231 Difference]: Finished difference. Result has 248 places, 478 transitions, 5929 flow [2023-08-30 18:14:47,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5929, PETRI_PLACES=248, PETRI_TRANSITIONS=478} [2023-08-30 18:14:47,405 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 180 predicate places. [2023-08-30 18:14:47,405 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 478 transitions, 5929 flow [2023-08-30 18:14:47,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 149.125) internal successors, (3579), 24 states have internal predecessors, (3579), 0 states have call successors, (0), 0 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 18:14:47,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:14:47,406 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:14:47,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 18:14:47,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:47,609 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:14:47,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:14:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash -433034171, now seen corresponding path program 1 times [2023-08-30 18:14:47,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:14:47,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767220024] [2023-08-30 18:14:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:47,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:14:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:47,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:14:47,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767220024] [2023-08-30 18:14:47,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767220024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:14:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794805393] [2023-08-30 18:14:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:47,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:47,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:14:47,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:14:47,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 18:14:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 18:14:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:14:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:47,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:14:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:47,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794805393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:14:47,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:14:47,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 18:14:47,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516732567] [2023-08-30 18:14:47,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:14:47,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:14:47,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:14:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:14:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:14:47,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 489 [2023-08-30 18:14:47,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 478 transitions, 5929 flow. Second operand has 9 states, 9 states have (on average 218.33333333333334) internal successors, (1965), 9 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:14:47,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:14:47,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 489 [2023-08-30 18:14:47,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:14:49,134 INFO L130 PetriNetUnfolder]: 2704/5620 cut-off events. [2023-08-30 18:14:49,134 INFO L131 PetriNetUnfolder]: For 61401/61425 co-relation queries the response was YES. [2023-08-30 18:14:49,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32664 conditions, 5620 events. 2704/5620 cut-off events. For 61401/61425 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 45749 event pairs, 280 based on Foata normal form. 783/6063 useless extension candidates. Maximal degree in co-relation 32589. Up to 3862 conditions per place. [2023-08-30 18:14:49,161 INFO L137 encePairwiseOnDemand]: 486/489 looper letters, 237 selfloop transitions, 6 changer transitions 260/510 dead transitions. [2023-08-30 18:14:49,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 510 transitions, 7162 flow [2023-08-30 18:14:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:14:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:14:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1163 transitions. [2023-08-30 18:14:49,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756646216768916 [2023-08-30 18:14:49,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1163 transitions. [2023-08-30 18:14:49,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1163 transitions. [2023-08-30 18:14:49,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:14:49,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1163 transitions. [2023-08-30 18:14:49,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.6) internal successors, (1163), 5 states have internal predecessors, (1163), 0 states have call successors, (0), 0 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 18:14:49,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:14:49,167 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:14:49,168 INFO L175 Difference]: Start difference. First operand has 248 places, 478 transitions, 5929 flow. Second operand 5 states and 1163 transitions. [2023-08-30 18:14:49,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 510 transitions, 7162 flow [2023-08-30 18:14:49,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 510 transitions, 6475 flow, removed 226 selfloop flow, removed 28 redundant places. [2023-08-30 18:14:49,478 INFO L231 Difference]: Finished difference. Result has 186 places, 153 transitions, 1497 flow [2023-08-30 18:14:49,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1497, PETRI_PLACES=186, PETRI_TRANSITIONS=153} [2023-08-30 18:14:49,479 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 118 predicate places. [2023-08-30 18:14:49,479 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 153 transitions, 1497 flow [2023-08-30 18:14:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 218.33333333333334) internal successors, (1965), 9 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:14:49,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:14:49,480 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:14:49,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 18:14:49,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:49,680 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:14:49,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:14:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1283263030, now seen corresponding path program 5 times [2023-08-30 18:14:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:14:49,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773978405] [2023-08-30 18:14:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:49,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:14:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:14:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773978405] [2023-08-30 18:14:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773978405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:14:50,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120695097] [2023-08-30 18:14:50,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:14:50,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:50,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:14:50,131 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:14:50,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 18:14:50,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 18:14:50,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:14:50,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:14:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:14:50,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:14:50,524 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:14:50,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:14:50,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:14:50,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:14:50,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:14:50,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:14:50,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:14:50,678 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:14:50,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:14:50,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:14:50,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 18:14:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:14:50,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:14:51,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:14:51,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:14:51,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:14:51,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:14:51,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:14:51,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:14:51,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:14:51,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:14:51,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:14:51,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:15:15,623 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_ULTIMATE.start_main_~#t_ids~0#1.base|)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_92| Int) (v_ArrVal_1141 (Array Int Int))) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_92|) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_103| Int) (|~#a~0.offset| Int) (v_ArrVal_1146 Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1141) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_103| 28) |~#a~0.offset|) v_ArrVal_1146) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_92| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_103| |v_t_funThread2of2ForFork0_~i~0#1_92|))) (< |v_t_funThread2of2ForFork0_~i~0#1_92| 1)))) is different from false [2023-08-30 18:15:25,113 WARN L222 SmtUtils]: Spent 9.44s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:15:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-30 18:15:25,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120695097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:25,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:25,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-08-30 18:15:25,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922073647] [2023-08-30 18:15:25,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:25,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:15:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:25,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:15:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=357, Unknown=10, NotChecked=40, Total=506 [2023-08-30 18:15:25,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 489 [2023-08-30 18:15:25,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 153 transitions, 1497 flow. Second operand has 23 states, 23 states have (on average 149.3913043478261) internal successors, (3436), 23 states have internal predecessors, (3436), 0 states have call successors, (0), 0 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 18:15:25,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:25,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 489 [2023-08-30 18:15:25,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:29,558 INFO L130 PetriNetUnfolder]: 1556/3291 cut-off events. [2023-08-30 18:15:29,558 INFO L131 PetriNetUnfolder]: For 23445/23469 co-relation queries the response was YES. [2023-08-30 18:15:29,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16674 conditions, 3291 events. 1556/3291 cut-off events. For 23445/23469 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25277 event pairs, 187 based on Foata normal form. 10/2980 useless extension candidates. Maximal degree in co-relation 16616. Up to 1300 conditions per place. [2023-08-30 18:15:29,574 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 156 selfloop transitions, 23 changer transitions 111/296 dead transitions. [2023-08-30 18:15:29,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 296 transitions, 3281 flow [2023-08-30 18:15:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:15:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:15:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2650 transitions. [2023-08-30 18:15:29,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187778178756165 [2023-08-30 18:15:29,578 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2650 transitions. [2023-08-30 18:15:29,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2650 transitions. [2023-08-30 18:15:29,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:29,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2650 transitions. [2023-08-30 18:15:29,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 155.88235294117646) internal successors, (2650), 17 states have internal predecessors, (2650), 0 states have call successors, (0), 0 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 18:15:29,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:29,587 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:29,587 INFO L175 Difference]: Start difference. First operand has 186 places, 153 transitions, 1497 flow. Second operand 17 states and 2650 transitions. [2023-08-30 18:15:29,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 296 transitions, 3281 flow [2023-08-30 18:15:29,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 296 transitions, 2940 flow, removed 54 selfloop flow, removed 30 redundant places. [2023-08-30 18:15:29,663 INFO L231 Difference]: Finished difference. Result has 164 places, 135 transitions, 1161 flow [2023-08-30 18:15:29,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1161, PETRI_PLACES=164, PETRI_TRANSITIONS=135} [2023-08-30 18:15:29,664 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-08-30 18:15:29,664 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 135 transitions, 1161 flow [2023-08-30 18:15:29,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 149.3913043478261) internal successors, (3436), 23 states have internal predecessors, (3436), 0 states have call successors, (0), 0 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 18:15:29,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:29,665 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:29,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:29,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:29,865 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:15:29,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1967049427, now seen corresponding path program 4 times [2023-08-30 18:15:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091092660] [2023-08-30 18:15:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:29,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:15:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:30,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091092660] [2023-08-30 18:15:30,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091092660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:30,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167287798] [2023-08-30 18:15:30,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:15:30,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:30,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:30,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 18:15:30,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:15:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:15:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:15:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:30,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:15:30,359 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:15:30,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:15:30,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:15:30,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:15:30,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:15:30,454 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:15:30,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:15:30,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:15:30,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 18:15:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:15:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:30,618 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1238 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1238) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|)) 0)) is different from false [2023-08-30 18:15:30,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:15:30,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:15:30,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-08-30 18:15:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 2 not checked. [2023-08-30 18:15:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167287798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:30,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-30 18:15:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697017487] [2023-08-30 18:15:30,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:30,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:15:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:15:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=149, Unknown=1, NotChecked=26, Total=240 [2023-08-30 18:15:31,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-08-30 18:15:31,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 135 transitions, 1161 flow. Second operand has 16 states, 16 states have (on average 152.75) internal successors, (2444), 16 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:31,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:31,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-08-30 18:15:31,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:31,796 INFO L130 PetriNetUnfolder]: 1026/2238 cut-off events. [2023-08-30 18:15:31,796 INFO L131 PetriNetUnfolder]: For 10383/10401 co-relation queries the response was YES. [2023-08-30 18:15:31,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10545 conditions, 2238 events. 1026/2238 cut-off events. For 10383/10401 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15992 event pairs, 194 based on Foata normal form. 4/2019 useless extension candidates. Maximal degree in co-relation 10497. Up to 1347 conditions per place. [2023-08-30 18:15:31,807 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 126 selfloop transitions, 8 changer transitions 47/187 dead transitions. [2023-08-30 18:15:31,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 1827 flow [2023-08-30 18:15:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:15:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:15:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2023-08-30 18:15:31,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32810724835264715 [2023-08-30 18:15:31,809 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2023-08-30 18:15:31,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2023-08-30 18:15:31,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:31,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2023-08-30 18:15:31,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 18:15:31,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:31,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:31,815 INFO L175 Difference]: Start difference. First operand has 164 places, 135 transitions, 1161 flow. Second operand 9 states and 1444 transitions. [2023-08-30 18:15:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 1827 flow [2023-08-30 18:15:31,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 187 transitions, 1718 flow, removed 31 selfloop flow, removed 19 redundant places. [2023-08-30 18:15:31,852 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 995 flow [2023-08-30 18:15:31,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2023-08-30 18:15:31,852 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 76 predicate places. [2023-08-30 18:15:31,853 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 995 flow [2023-08-30 18:15:31,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 152.75) internal successors, (2444), 16 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:31,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:31,853 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:31,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:32,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 18:15:32,059 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:15:32,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash -128099310, now seen corresponding path program 6 times [2023-08-30 18:15:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:32,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471254570] [2023-08-30 18:15:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:15:32,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:32,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471254570] [2023-08-30 18:15:32,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471254570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:32,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019175852] [2023-08-30 18:15:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:15:32,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:32,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:32,461 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:32,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 18:15:32,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 18:15:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:15:32,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:15:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:32,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:15:32,808 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:15:32,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:15:32,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:15:32,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:15:32,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:15:32,902 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:15:32,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:15:32,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:15:33,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 18:15:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:15:33,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:33,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:15:33,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:15:33,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-08-30 18:15:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:15:33,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019175852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:33,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 18:15:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639565703] [2023-08-30 18:15:33,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:33,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:15:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:33,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:15:33,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:15:34,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 489 [2023-08-30 18:15:34,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 995 flow. Second operand has 15 states, 15 states have (on average 190.53333333333333) internal successors, (2858), 15 states have internal predecessors, (2858), 0 states have call successors, (0), 0 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 18:15:34,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:34,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 489 [2023-08-30 18:15:34,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:34,706 INFO L130 PetriNetUnfolder]: 785/1784 cut-off events. [2023-08-30 18:15:34,706 INFO L131 PetriNetUnfolder]: For 6896/6920 co-relation queries the response was YES. [2023-08-30 18:15:34,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8121 conditions, 1784 events. 785/1784 cut-off events. For 6896/6920 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12508 event pairs, 194 based on Foata normal form. 11/1633 useless extension candidates. Maximal degree in co-relation 8078. Up to 1072 conditions per place. [2023-08-30 18:15:34,713 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 113 selfloop transitions, 7 changer transitions 45/172 dead transitions. [2023-08-30 18:15:34,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 172 transitions, 1637 flow [2023-08-30 18:15:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:15:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:15:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1775 transitions. [2023-08-30 18:15:34,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033174278573052 [2023-08-30 18:15:34,716 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1775 transitions. [2023-08-30 18:15:34,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1775 transitions. [2023-08-30 18:15:34,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:34,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1775 transitions. [2023-08-30 18:15:34,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.22222222222223) internal successors, (1775), 9 states have internal predecessors, (1775), 0 states have call successors, (0), 0 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 18:15:34,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:34,721 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:15:34,722 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 995 flow. Second operand 9 states and 1775 transitions. [2023-08-30 18:15:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 172 transitions, 1637 flow [2023-08-30 18:15:34,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 172 transitions, 1579 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-08-30 18:15:34,747 INFO L231 Difference]: Finished difference. Result has 135 places, 118 transitions, 876 flow [2023-08-30 18:15:34,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=135, PETRI_TRANSITIONS=118} [2023-08-30 18:15:34,747 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 67 predicate places. [2023-08-30 18:15:34,748 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 118 transitions, 876 flow [2023-08-30 18:15:34,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 190.53333333333333) internal successors, (2858), 15 states have internal predecessors, (2858), 0 states have call successors, (0), 0 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 18:15:34,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:34,748 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:34,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:34,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 18:15:34,954 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:15:34,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1319320733, now seen corresponding path program 5 times [2023-08-30 18:15:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297211839] [2023-08-30 18:15:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:15:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 18:15:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:15:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297211839] [2023-08-30 18:15:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297211839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:15:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54585256] [2023-08-30 18:15:37,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:15:37,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:15:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:37,401 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:15:37,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 18:15:37,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 18:15:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:15:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:15:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:15:37,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:15:37,823 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:15:37,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:15:37,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:15:37,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:15:37,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:15:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:15:37,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:15:38,056 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:15:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:15:38,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:15:38,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 18:15:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:15:38,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:15:38,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:15:38,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 80 [2023-08-30 18:15:38,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:15:38,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 121 [2023-08-30 18:15:38,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 77 [2023-08-30 18:15:38,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 70 [2023-08-30 18:15:38,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 63 [2023-08-30 18:15:46,669 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1413 (Array Int Int)) (v_prenex_3 Int) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1413) |c_~#a~0.base|) (+ (* 28 v_prenex_3) |~#a~0.offset|)) 0)) (not (= |c_~#a~0.base| |c_ULTIMATE.start_main_~#t_ids~0#1.base|)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-30 18:15:57,436 WARN L222 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 30 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:15:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-30 18:15:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54585256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:15:57,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:15:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 8] total 30 [2023-08-30 18:15:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664815044] [2023-08-30 18:15:57,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:15:57,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:15:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:15:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:15:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=4, NotChecked=58, Total=992 [2023-08-30 18:15:57,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 489 [2023-08-30 18:15:57,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 118 transitions, 876 flow. Second operand has 32 states, 32 states have (on average 143.96875) internal successors, (4607), 32 states have internal predecessors, (4607), 0 states have call successors, (0), 0 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 18:15:57,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:15:57,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 489 [2023-08-30 18:15:57,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:15:59,605 INFO L130 PetriNetUnfolder]: 766/1740 cut-off events. [2023-08-30 18:15:59,606 INFO L131 PetriNetUnfolder]: For 6151/6157 co-relation queries the response was YES. [2023-08-30 18:15:59,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7576 conditions, 1740 events. 766/1740 cut-off events. For 6151/6157 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12106 event pairs, 200 based on Foata normal form. 12/1590 useless extension candidates. Maximal degree in co-relation 7537. Up to 627 conditions per place. [2023-08-30 18:15:59,612 INFO L137 encePairwiseOnDemand]: 473/489 looper letters, 82 selfloop transitions, 20 changer transitions 102/210 dead transitions. [2023-08-30 18:15:59,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 210 transitions, 1835 flow [2023-08-30 18:15:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:15:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:15:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3692 transitions. [2023-08-30 18:15:59,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020040899795501 [2023-08-30 18:15:59,616 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3692 transitions. [2023-08-30 18:15:59,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3692 transitions. [2023-08-30 18:15:59,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:15:59,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3692 transitions. [2023-08-30 18:15:59,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 147.68) internal successors, (3692), 25 states have internal predecessors, (3692), 0 states have call successors, (0), 0 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 18:15:59,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 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 18:15:59,662 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 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 18:15:59,662 INFO L175 Difference]: Start difference. First operand has 135 places, 118 transitions, 876 flow. Second operand 25 states and 3692 transitions. [2023-08-30 18:15:59,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 210 transitions, 1835 flow [2023-08-30 18:15:59,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 210 transitions, 1793 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 18:15:59,681 INFO L231 Difference]: Finished difference. Result has 150 places, 98 transitions, 754 flow [2023-08-30 18:15:59,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=754, PETRI_PLACES=150, PETRI_TRANSITIONS=98} [2023-08-30 18:15:59,681 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 82 predicate places. [2023-08-30 18:15:59,682 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 98 transitions, 754 flow [2023-08-30 18:15:59,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.96875) internal successors, (4607), 32 states have internal predecessors, (4607), 0 states have call successors, (0), 0 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 18:15:59,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:15:59,683 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:15:59,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 18:15:59,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 18:15:59,890 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:15:59,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:15:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1859887449, now seen corresponding path program 6 times [2023-08-30 18:15:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:15:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56563167] [2023-08-30 18:15:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:15:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:15:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:16:00,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56563167] [2023-08-30 18:16:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56563167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:16:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979998209] [2023-08-30 18:16:00,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:16:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:00,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:16:00,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 18:16:00,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 18:16:00,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 18:16:00,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:00,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:16:00,864 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:16:00,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:16:00,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:16:00,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:16:00,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:16:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:16:00,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:16:00,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:16:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:16:01,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:16:01,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 18:16:01,095 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:16:01,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:16:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:16:01,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:01,183 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1511 (Array Int Int)) (v_ArrVal_1510 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1510) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1511) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0)))) is different from false [2023-08-30 18:16:01,191 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1508 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1511 (Array Int Int)) (v_ArrVal_1510 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1510) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)) v_ArrVal_1508)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1511) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0)))) is different from false [2023-08-30 18:16:01,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:16:01,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:16:01,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:16:01,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:16:01,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:16:03,256 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1508 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1511 (Array Int Int)) (|~#a~0.offset| Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1508)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1511) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_111| |v_t_funThread2of2ForFork0_~i~0#1_100|))) (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1508 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1511 (Array Int Int)) (|~#a~0.offset| Int)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1508)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1511) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0))))) is different from false [2023-08-30 18:16:04,215 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1504 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1508 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1511 (Array Int Int)) (|~#a~0.offset| Int)) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1504))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1508))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1511) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) (forall ((v_ArrVal_1504 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1508 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1511 (Array Int Int)) (|~#a~0.offset| Int)) (or (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1504))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1508))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1511) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_111| |v_t_funThread2of2ForFork0_~i~0#1_100|)))) is different from false [2023-08-30 18:16:12,314 WARN L222 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:16:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-08-30 18:16:12,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979998209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:12,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:16:12,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2023-08-30 18:16:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862225015] [2023-08-30 18:16:12,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:12,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:16:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:16:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=242, Unknown=5, NotChecked=148, Total=506 [2023-08-30 18:16:13,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:15,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:15,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-08-30 18:16:15,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 98 transitions, 754 flow. Second operand has 23 states, 23 states have (on average 151.30434782608697) internal successors, (3480), 23 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:16:15,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:15,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-08-30 18:16:15,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:38,241 WARN L222 SmtUtils]: Spent 22.29s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:16:40,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:42,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:44,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:46,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 18:16:48,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 18:16:50,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 18:16:52,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:54,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:56,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:16:56,730 INFO L130 PetriNetUnfolder]: 357/858 cut-off events. [2023-08-30 18:16:56,730 INFO L131 PetriNetUnfolder]: For 3612/3618 co-relation queries the response was YES. [2023-08-30 18:16:56,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 858 events. 357/858 cut-off events. For 3612/3618 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5023 event pairs, 128 based on Foata normal form. 1/806 useless extension candidates. Maximal degree in co-relation 4081. Up to 604 conditions per place. [2023-08-30 18:16:56,734 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 97 selfloop transitions, 11 changer transitions 11/125 dead transitions. [2023-08-30 18:16:56,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 125 transitions, 1178 flow [2023-08-30 18:16:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:16:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:16:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1407 transitions. [2023-08-30 18:16:56,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31970006816632585 [2023-08-30 18:16:56,736 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1407 transitions. [2023-08-30 18:16:56,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1407 transitions. [2023-08-30 18:16:56,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:56,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1407 transitions. [2023-08-30 18:16:56,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 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 18:16:56,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:16:56,739 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:16:56,739 INFO L175 Difference]: Start difference. First operand has 150 places, 98 transitions, 754 flow. Second operand 9 states and 1407 transitions. [2023-08-30 18:16:56,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 125 transitions, 1178 flow [2023-08-30 18:16:56,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 125 transitions, 1064 flow, removed 39 selfloop flow, removed 27 redundant places. [2023-08-30 18:16:56,748 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 716 flow [2023-08-30 18:16:56,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=716, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2023-08-30 18:16:56,749 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 49 predicate places. [2023-08-30 18:16:56,749 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 716 flow [2023-08-30 18:16:56,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 151.30434782608697) internal successors, (3480), 23 states have internal predecessors, (3480), 0 states have call successors, (0), 0 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 18:16:56,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:56,750 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:56,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 18:16:56,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:56,956 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:16:56,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1820711057, now seen corresponding path program 1 times [2023-08-30 18:16:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:56,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525374867] [2023-08-30 18:16:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:56,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:16:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525374867] [2023-08-30 18:16:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525374867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:16:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414010920] [2023-08-30 18:16:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:57,314 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:16:57,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 18:16:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:16:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:57,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:16:57,553 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:16:57,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:16:57,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:16:57,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:16:57,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-30 18:16:57,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 18:16:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:16:57,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:17:20,475 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1604 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_102| Int) (|~#a~0.offset| Int) (|t_funThread1of2ForFork0_~i~0#1| Int)) (or (= (select (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1604) |c_~#a~0.base|)) (.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_102| 28) |~#a~0.offset|)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_102| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_102|))) is different from false [2023-08-30 18:17:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:17:20,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414010920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:17:20,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:17:20,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-08-30 18:17:20,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121345960] [2023-08-30 18:17:20,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:17:20,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:17:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:17:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=321, Unknown=12, NotChecked=38, Total=462 [2023-08-30 18:17:20,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-08-30 18:17:20,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 716 flow. Second operand has 22 states, 22 states have (on average 170.6818181818182) internal successors, (3755), 22 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:20,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:20,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-08-30 18:17:20,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:24,358 INFO L130 PetriNetUnfolder]: 377/934 cut-off events. [2023-08-30 18:17:24,358 INFO L131 PetriNetUnfolder]: For 3035/3041 co-relation queries the response was YES. [2023-08-30 18:17:24,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 934 events. 377/934 cut-off events. For 3035/3041 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5722 event pairs, 129 based on Foata normal form. 9/883 useless extension candidates. Maximal degree in co-relation 4184. Up to 580 conditions per place. [2023-08-30 18:17:24,362 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 106 selfloop transitions, 21 changer transitions 9/143 dead transitions. [2023-08-30 18:17:24,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 143 transitions, 1313 flow [2023-08-30 18:17:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:17:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:17:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2096 transitions. [2023-08-30 18:17:24,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35719154737559644 [2023-08-30 18:17:24,364 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2096 transitions. [2023-08-30 18:17:24,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2096 transitions. [2023-08-30 18:17:24,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:24,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2096 transitions. [2023-08-30 18:17:24,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 174.66666666666666) internal successors, (2096), 12 states have internal predecessors, (2096), 0 states have call successors, (0), 0 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 18:17:24,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:24,369 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:24,369 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 716 flow. Second operand 12 states and 2096 transitions. [2023-08-30 18:17:24,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 143 transitions, 1313 flow [2023-08-30 18:17:24,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 143 transitions, 1289 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 18:17:24,376 INFO L231 Difference]: Finished difference. Result has 126 places, 108 transitions, 829 flow [2023-08-30 18:17:24,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=829, PETRI_PLACES=126, PETRI_TRANSITIONS=108} [2023-08-30 18:17:24,376 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 58 predicate places. [2023-08-30 18:17:24,377 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 108 transitions, 829 flow [2023-08-30 18:17:24,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.6818181818182) internal successors, (3755), 22 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:24,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:24,378 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:24,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 18:17:24,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 18:17:24,581 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:17:24,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash -226772141, now seen corresponding path program 2 times [2023-08-30 18:17:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425433887] [2023-08-30 18:17:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:17:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:17:24,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:24,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425433887] [2023-08-30 18:17:24,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425433887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:17:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536152330] [2023-08-30 18:17:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:17:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:24,898 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:24,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 18:17:25,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:17:25,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:17:25,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:17:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:17:25,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:17:25,098 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:17:25,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:17:25,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:17:25,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-30 18:17:25,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 18:17:25,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:17:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:17:25,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:17:39,305 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1705 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1705) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-30 18:17:45,995 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1705 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|))) (store .cse0 .cse1 (+ (- 1) (select .cse0 .cse1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1705) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-30 18:17:46,005 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1705 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) |c_t_funThread1of2ForFork0_#t~post37#1|)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1705) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-08-30 18:17:46,010 WARN L839 $PredicateComparison]: unable to prove that (forall ((|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_1705 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1705) |c_~#a~0.base|) (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|)) 0)) is different from false [2023-08-30 18:17:48,046 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1700 (Array Int Int)) (|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_1705 (Array Int Int))) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1700))) (store .cse0 |c_~#a~0.base| (let ((.cse1 (select .cse0 |c_~#a~0.base|)) (.cse2 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse1 .cse2 (select .cse1 .cse2))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1705) |c_~#a~0.base|) (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|)) 0)) is different from false [2023-08-30 18:17:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-30 18:17:48,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536152330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:17:48,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:17:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 20 [2023-08-30 18:17:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374706503] [2023-08-30 18:17:48,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:17:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:17:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:17:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:17:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=191, Unknown=24, NotChecked=170, Total=462 [2023-08-30 18:17:48,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-08-30 18:17:48,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 108 transitions, 829 flow. Second operand has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:48,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:17:48,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-08-30 18:17:48,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:17:54,765 INFO L130 PetriNetUnfolder]: 441/1157 cut-off events. [2023-08-30 18:17:54,766 INFO L131 PetriNetUnfolder]: For 4126/4132 co-relation queries the response was YES. [2023-08-30 18:17:54,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5437 conditions, 1157 events. 441/1157 cut-off events. For 4126/4132 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7921 event pairs, 145 based on Foata normal form. 9/1092 useless extension candidates. Maximal degree in co-relation 5402. Up to 430 conditions per place. [2023-08-30 18:17:54,770 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 84 selfloop transitions, 6 changer transitions 91/188 dead transitions. [2023-08-30 18:17:54,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 188 transitions, 1906 flow [2023-08-30 18:17:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:17:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:17:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1767 transitions. [2023-08-30 18:17:54,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36134969325153377 [2023-08-30 18:17:54,772 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1767 transitions. [2023-08-30 18:17:54,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1767 transitions. [2023-08-30 18:17:54,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:17:54,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1767 transitions. [2023-08-30 18:17:54,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 176.7) internal successors, (1767), 10 states have internal predecessors, (1767), 0 states have call successors, (0), 0 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 18:17:54,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:54,776 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:54,776 INFO L175 Difference]: Start difference. First operand has 126 places, 108 transitions, 829 flow. Second operand 10 states and 1767 transitions. [2023-08-30 18:17:54,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 188 transitions, 1906 flow [2023-08-30 18:17:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 188 transitions, 1807 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-08-30 18:17:54,785 INFO L231 Difference]: Finished difference. Result has 134 places, 95 transitions, 718 flow [2023-08-30 18:17:54,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=718, PETRI_PLACES=134, PETRI_TRANSITIONS=95} [2023-08-30 18:17:54,786 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 66 predicate places. [2023-08-30 18:17:54,786 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 95 transitions, 718 flow [2023-08-30 18:17:54,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:17:54,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:17:54,787 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:17:54,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 18:17:54,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:54,993 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:17:54,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:17:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash 441461738, now seen corresponding path program 1 times [2023-08-30 18:17:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:17:54,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399740814] [2023-08-30 18:17:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:17:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:17:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:17:55,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:17:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399740814] [2023-08-30 18:17:55,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399740814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:17:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483153208] [2023-08-30 18:17:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:17:55,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:17:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:17:55,711 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:17:55,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 18:17:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:17:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:17:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:17:55,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:17:55,914 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:17:55,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:17:55,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:17:55,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:17:56,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-30 18:17:56,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 18:17:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:17:56,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:18:34,468 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1798 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_117| Int) (|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int)) (or (= (select (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1798) |c_~#a~0.base|)) (.cse1 (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_117| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_117|) (< |v_t_funThread1of2ForFork0_~i~0#1_117| 1))) is different from false [2023-08-30 18:18:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:18:34,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483153208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:18:34,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:18:34,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 24 [2023-08-30 18:18:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274989002] [2023-08-30 18:18:34,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:18:34,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:18:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:18:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=460, Unknown=18, NotChecked=46, Total=650 [2023-08-30 18:18:34,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 489 [2023-08-30 18:18:34,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 95 transitions, 718 flow. Second operand has 26 states, 26 states have (on average 147.34615384615384) internal successors, (3831), 26 states have internal predecessors, (3831), 0 states have call successors, (0), 0 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 18:18:34,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:34,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 489 [2023-08-30 18:18:34,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:18:48,005 INFO L130 PetriNetUnfolder]: 174/533 cut-off events. [2023-08-30 18:18:48,005 INFO L131 PetriNetUnfolder]: For 1876/1882 co-relation queries the response was YES. [2023-08-30 18:18:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 533 events. 174/533 cut-off events. For 1876/1882 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3014 event pairs, 52 based on Foata normal form. 9/509 useless extension candidates. Maximal degree in co-relation 2373. Up to 260 conditions per place. [2023-08-30 18:18:48,007 INFO L137 encePairwiseOnDemand]: 469/489 looper letters, 91 selfloop transitions, 30 changer transitions 18/145 dead transitions. [2023-08-30 18:18:48,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 145 transitions, 1402 flow [2023-08-30 18:18:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 18:18:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 18:18:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2855 transitions. [2023-08-30 18:18:48,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30728662146162955 [2023-08-30 18:18:48,010 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2855 transitions. [2023-08-30 18:18:48,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2855 transitions. [2023-08-30 18:18:48,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:18:48,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2855 transitions. [2023-08-30 18:18:48,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 150.26315789473685) internal successors, (2855), 19 states have internal predecessors, (2855), 0 states have call successors, (0), 0 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 18:18:48,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 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 18:18:48,017 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 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 18:18:48,018 INFO L175 Difference]: Start difference. First operand has 134 places, 95 transitions, 718 flow. Second operand 19 states and 2855 transitions. [2023-08-30 18:18:48,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 145 transitions, 1402 flow [2023-08-30 18:18:48,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 145 transitions, 1331 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-08-30 18:18:48,024 INFO L231 Difference]: Finished difference. Result has 140 places, 107 transitions, 865 flow [2023-08-30 18:18:48,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=865, PETRI_PLACES=140, PETRI_TRANSITIONS=107} [2023-08-30 18:18:48,024 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 72 predicate places. [2023-08-30 18:18:48,025 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 107 transitions, 865 flow [2023-08-30 18:18:48,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 147.34615384615384) internal successors, (3831), 26 states have internal predecessors, (3831), 0 states have call successors, (0), 0 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 18:18:48,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:18:48,025 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:18:48,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 18:18:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 18:18:48,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:18:48,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:18:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash 519649285, now seen corresponding path program 3 times [2023-08-30 18:18:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:18:48,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039188347] [2023-08-30 18:18:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:18:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:18:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:18:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:18:48,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:18:48,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039188347] [2023-08-30 18:18:48,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039188347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:18:48,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732956476] [2023-08-30 18:18:48,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:18:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:18:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:18:48,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:18:48,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 18:18:48,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:18:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:18:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:18:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:18:48,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:18:48,815 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:18:48,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:18:48,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:18:48,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-08-30 18:18:48,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-30 18:18:48,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 18:18:49,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:18:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:18:49,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:18:49,070 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1904 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1904) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28))) 0)) is different from false [2023-08-30 18:18:49,371 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_~i~0#1_108| Int) (v_ArrVal_1904 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|))) (store .cse0 .cse1 (+ (- 1) (select .cse0 .cse1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1904) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_108| 28) |c_~#a~0.offset|)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_108| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_108|))) is different from false [2023-08-30 18:18:49,396 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_~i~0#1_108| Int) (v_ArrVal_1904 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) |c_t_funThread1of2ForFork0_#t~post37#1|)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1904) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_108| 28) |c_~#a~0.offset|)) 0) (< |v_t_funThread2of2ForFork0_~i~0#1_108| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_108|))) is different from false [2023-08-30 18:18:50,398 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1899 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_108| Int) (v_ArrVal_1904 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_108| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_108|) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1899))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) |c_t_funThread1of2ForFork0_#t~post37#1|))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1904) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_108| 28) |c_~#a~0.offset|)) 0))) is different from false [2023-08-30 18:18:52,428 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1899 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread2of2ForFork0_~i~0#1_108| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_1904 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_108| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_108|) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1899))) (store .cse0 |c_~#a~0.base| (let ((.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store (select .cse0 |c_~#a~0.base|) .cse1 (select (select |c_#memory_int| |c_~#a~0.base|) .cse1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1904) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_108| 28) |~#a~0.offset|)) 0))) is different from false [2023-08-30 18:18:54,499 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1899 (Array Int Int)) (v_ArrVal_1898 (Array Int Int)) (|~#a~0.offset| Int) (|v_t_funThread2of2ForFork0_~i~0#1_108| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_1904 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_108| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_108|) (= 0 (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1899))) (store .cse0 |c_~#a~0.base| (let ((.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store (select .cse0 |c_~#a~0.base|) .cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1898) |c_~#a~0.base|) .cse1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1904) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_108| 28) |~#a~0.offset|))))) is different from false [2023-08-30 18:18:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 6 not checked. [2023-08-30 18:18:54,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732956476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:18:54,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:18:54,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 22 [2023-08-30 18:18:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93962288] [2023-08-30 18:18:54,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:18:54,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:18:54,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:18:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:18:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=242, Unknown=10, NotChecked=222, Total=552 [2023-08-30 18:18:54,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-08-30 18:18:54,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 107 transitions, 865 flow. Second operand has 24 states, 24 states have (on average 170.75) internal successors, (4098), 24 states have internal predecessors, (4098), 0 states have call successors, (0), 0 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 18:18:54,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:18:54,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-08-30 18:18:54,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:02,876 WARN L222 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 43 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:19:03,363 INFO L130 PetriNetUnfolder]: 150/495 cut-off events. [2023-08-30 18:19:03,363 INFO L131 PetriNetUnfolder]: For 1710/1710 co-relation queries the response was YES. [2023-08-30 18:19:03,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 495 events. 150/495 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2815 event pairs, 40 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 2255. Up to 155 conditions per place. [2023-08-30 18:19:03,365 INFO L137 encePairwiseOnDemand]: 475/489 looper letters, 56 selfloop transitions, 7 changer transitions 77/144 dead transitions. [2023-08-30 18:19:03,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 144 transitions, 1448 flow [2023-08-30 18:19:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:19:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:19:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2267 transitions. [2023-08-30 18:19:03,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566147553877615 [2023-08-30 18:19:03,368 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2267 transitions. [2023-08-30 18:19:03,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2267 transitions. [2023-08-30 18:19:03,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:03,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2267 transitions. [2023-08-30 18:19:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 174.3846153846154) internal successors, (2267), 13 states have internal predecessors, (2267), 0 states have call successors, (0), 0 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 18:19:03,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:03,375 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:03,375 INFO L175 Difference]: Start difference. First operand has 140 places, 107 transitions, 865 flow. Second operand 13 states and 2267 transitions. [2023-08-30 18:19:03,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 144 transitions, 1448 flow [2023-08-30 18:19:03,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 144 transitions, 1326 flow, removed 38 selfloop flow, removed 15 redundant places. [2023-08-30 18:19:03,383 INFO L231 Difference]: Finished difference. Result has 138 places, 65 transitions, 437 flow [2023-08-30 18:19:03,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=437, PETRI_PLACES=138, PETRI_TRANSITIONS=65} [2023-08-30 18:19:03,384 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2023-08-30 18:19:03,384 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 65 transitions, 437 flow [2023-08-30 18:19:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 170.75) internal successors, (4098), 24 states have internal predecessors, (4098), 0 states have call successors, (0), 0 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 18:19:03,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:03,385 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:19:03,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:03,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:03,592 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:19:03,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1755911576, now seen corresponding path program 2 times [2023-08-30 18:19:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:03,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321555829] [2023-08-30 18:19:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-08-30 18:19:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321555829] [2023-08-30 18:19:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321555829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568458686] [2023-08-30 18:19:03,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:19:03,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:03,929 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:03,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 18:19:04,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:19:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:19:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 18:19:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:04,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:19:04,192 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:19:04,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:19:04,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:19:04,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:19:04,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-08-30 18:19:04,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-08-30 18:19:04,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:19:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-30 18:19:04,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:19:04,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568458686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:19:04,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:19:04,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-08-30 18:19:04,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673981783] [2023-08-30 18:19:04,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:19:04,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:19:04,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:19:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:19:04,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 489 [2023-08-30 18:19:04,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 65 transitions, 437 flow. Second operand has 8 states, 8 states have (on average 202.75) internal successors, (1622), 8 states have internal predecessors, (1622), 0 states have call successors, (0), 0 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 18:19:04,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:04,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 489 [2023-08-30 18:19:04,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:04,690 INFO L130 PetriNetUnfolder]: 50/175 cut-off events. [2023-08-30 18:19:04,690 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-08-30 18:19:04,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 175 events. 50/175 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 599 event pairs, 10 based on Foata normal form. 3/178 useless extension candidates. Maximal degree in co-relation 782. Up to 76 conditions per place. [2023-08-30 18:19:04,691 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-30 18:19:04,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 72 transitions, 640 flow [2023-08-30 18:19:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:19:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:19:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1634 transitions. [2023-08-30 18:19:04,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176891615541922 [2023-08-30 18:19:04,693 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1634 transitions. [2023-08-30 18:19:04,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1634 transitions. [2023-08-30 18:19:04,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:04,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1634 transitions. [2023-08-30 18:19:04,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 204.25) internal successors, (1634), 8 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 18:19:04,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 489.0) internal successors, (4401), 9 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:04,697 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 489.0) internal successors, (4401), 9 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:04,698 INFO L175 Difference]: Start difference. First operand has 138 places, 65 transitions, 437 flow. Second operand 8 states and 1634 transitions. [2023-08-30 18:19:04,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 72 transitions, 640 flow [2023-08-30 18:19:04,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 72 transitions, 571 flow, removed 16 selfloop flow, removed 18 redundant places. [2023-08-30 18:19:04,701 INFO L231 Difference]: Finished difference. Result has 91 places, 0 transitions, 0 flow [2023-08-30 18:19:04,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=91, PETRI_TRANSITIONS=0} [2023-08-30 18:19:04,701 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 23 predicate places. [2023-08-30 18:19:04,702 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 0 transitions, 0 flow [2023-08-30 18:19:04,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 202.75) internal successors, (1622), 8 states have internal predecessors, (1622), 0 states have call successors, (0), 0 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 18:19:04,702 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 18:19:04,702 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 18:19:04,702 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 18:19:04,703 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 18:19:04,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:04,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:04,908 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 18:19:04,909 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 18:19:04,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-08-30 18:19:04,936 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-08-30 18:19:04,936 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 18:19:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-08-30 18:19:04,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-08-30 18:19:04,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-08-30 18:19:04,940 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:19:04,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-08-30 18:19:04,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-08-30 18:19:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-08-30 18:19:04,973 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-08-30 18:19:04,974 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 18:19:04,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-08-30 18:19:04,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-08-30 18:19:08,103 INFO L134 LiptonReduction]: Checked pairs total: 56798 [2023-08-30 18:19:08,103 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-30 18:19:08,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:19:08,105 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;@5d5fe3d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:19:08,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:19:08,110 INFO L130 PetriNetUnfolder]: 35/107 cut-off events. [2023-08-30 18:19:08,110 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:19:08,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:08,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 18:19:08,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:19:08,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash 825656438, now seen corresponding path program 1 times [2023-08-30 18:19:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159990897] [2023-08-30 18:19:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:08,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159990897] [2023-08-30 18:19:08,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159990897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:19:08,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:19:08,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:19:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230809703] [2023-08-30 18:19:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:19:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:19:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:19:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:19:08,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 480 [2023-08-30 18:19:08,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 18:19:08,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:08,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 480 [2023-08-30 18:19:08,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:08,811 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-08-30 18:19:08,812 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 18:19:08,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 16533 events. 10559/16533 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 109398 event pairs, 9818 based on Foata normal form. 2499/16469 useless extension candidates. Maximal degree in co-relation 13984. Up to 15431 conditions per place. [2023-08-30 18:19:08,845 INFO L137 encePairwiseOnDemand]: 446/480 looper letters, 38 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-08-30 18:19:08,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-08-30 18:19:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:19:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:19:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 738 transitions. [2023-08-30 18:19:08,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2023-08-30 18:19:08,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 738 transitions. [2023-08-30 18:19:08,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 738 transitions. [2023-08-30 18:19:08,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:08,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 738 transitions. [2023-08-30 18:19:08,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 18:19:08,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:08,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:08,849 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 738 transitions. [2023-08-30 18:19:08,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-08-30 18:19:08,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:19:08,851 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-08-30 18:19:08,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-08-30 18:19:08,851 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-30 18:19:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-08-30 18:19:08,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 18:19:08,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:08,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 18:19:08,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 18:19:08,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:19:08,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 92065484, now seen corresponding path program 1 times [2023-08-30 18:19:08,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:08,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453317718] [2023-08-30 18:19:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:08,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453317718] [2023-08-30 18:19:08,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453317718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338170495] [2023-08-30 18:19:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:08,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:08,881 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:08,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 18:19:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:19:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:09,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:19:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338170495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:19:09,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:19:09,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:19:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953433321] [2023-08-30 18:19:09,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:19:09,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:19:09,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:19:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:19:09,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 480 [2023-08-30 18:19:09,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 216.71428571428572) internal successors, (1517), 7 states have internal predecessors, (1517), 0 states have call successors, (0), 0 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 18:19:09,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:09,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 480 [2023-08-30 18:19:09,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:09,211 INFO L130 PetriNetUnfolder]: 1958/3219 cut-off events. [2023-08-30 18:19:09,211 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 18:19:09,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 3219 events. 1958/3219 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17555 event pairs, 1837 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 6287. Up to 2999 conditions per place. [2023-08-30 18:19:09,219 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 38 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-30 18:19:09,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 214 flow [2023-08-30 18:19:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:19:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:19:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1336 transitions. [2023-08-30 18:19:09,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2023-08-30 18:19:09,221 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1336 transitions. [2023-08-30 18:19:09,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1336 transitions. [2023-08-30 18:19:09,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:09,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1336 transitions. [2023-08-30 18:19:09,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.66666666666666) internal successors, (1336), 6 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 18:19:09,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:09,224 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:09,224 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1336 transitions. [2023-08-30 18:19:09,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 214 flow [2023-08-30 18:19:09,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 208 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 18:19:09,225 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-08-30 18:19:09,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-30 18:19:09,225 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-08-30 18:19:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-08-30 18:19:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.71428571428572) internal successors, (1517), 7 states have internal predecessors, (1517), 0 states have call successors, (0), 0 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 18:19:09,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:09,225 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 18:19:09,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:09,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:09,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:19:09,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash 899770870, now seen corresponding path program 2 times [2023-08-30 18:19:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:09,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651288687] [2023-08-30 18:19:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:09,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:09,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:09,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651288687] [2023-08-30 18:19:09,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651288687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:09,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428696297] [2023-08-30 18:19:09,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:19:09,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:09,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:09,474 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 18:19:09,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:19:09,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:19:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:19:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:09,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:19:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 18:19:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428696297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:19:09,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:19:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 18:19:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358427648] [2023-08-30 18:19:09,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:19:09,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:19:09,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:19:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:19:09,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 480 [2023-08-30 18:19:09,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 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 18:19:09,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:09,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 480 [2023-08-30 18:19:09,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:09,939 INFO L130 PetriNetUnfolder]: 1958/3225 cut-off events. [2023-08-30 18:19:09,939 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 18:19:09,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 3225 events. 1958/3225 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17556 event pairs, 1837 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 6272. Up to 2999 conditions per place. [2023-08-30 18:19:09,947 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-08-30 18:19:09,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 280 flow [2023-08-30 18:19:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:19:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:19:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2635 transitions. [2023-08-30 18:19:09,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574652777777778 [2023-08-30 18:19:09,949 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2635 transitions. [2023-08-30 18:19:09,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2635 transitions. [2023-08-30 18:19:09,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:09,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2635 transitions. [2023-08-30 18:19:09,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.58333333333334) internal successors, (2635), 12 states have internal predecessors, (2635), 0 states have call successors, (0), 0 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 18:19:09,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:09,954 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:09,954 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2635 transitions. [2023-08-30 18:19:09,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 280 flow [2023-08-30 18:19:09,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 266 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:19:09,955 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-08-30 18:19:09,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-08-30 18:19:09,955 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-30 18:19:09,955 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-08-30 18:19:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 0 states have call successors, (0), 0 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 18:19:09,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:09,956 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 18:19:09,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:10,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 18:19:10,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:19:10,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1112545846, now seen corresponding path program 3 times [2023-08-30 18:19:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:10,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846094823] [2023-08-30 18:19:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:10,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:19:10,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:19:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:19:10,194 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:19:10,195 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:19:10,195 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:19:10,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 18:19:10,195 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-30 18:19:10,196 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:19:10,196 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:19:10,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 18:19:10,220 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:19:10,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-08-30 18:19:10,286 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-08-30 18:19:10,286 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-30 18:19:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-08-30 18:19:10,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-08-30 18:19:10,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-08-30 18:19:10,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:19:10,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-08-30 18:19:10,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-08-30 18:19:10,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-08-30 18:19:10,362 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-08-30 18:19:10,362 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-30 18:19:10,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-08-30 18:19:10,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-08-30 18:19:14,138 INFO L134 LiptonReduction]: Checked pairs total: 111258 [2023-08-30 18:19:14,138 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-08-30 18:19:14,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:19:14,140 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@5d5fe3d7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:19:14,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 18:19:14,141 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2023-08-30 18:19:14,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:19:14,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:14,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 18:19:14,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:19:14,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2000365025, now seen corresponding path program 1 times [2023-08-30 18:19:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:14,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009213348] [2023-08-30 18:19:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:14,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:14,158 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 18:19:14,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:14,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009213348] [2023-08-30 18:19:14,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009213348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:19:14,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:19:14,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:19:14,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820183500] [2023-08-30 18:19:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:19:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:19:14,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:19:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:19:14,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 619 [2023-08-30 18:19:14,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 18:19:14,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:14,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 619 [2023-08-30 18:19:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:30,150 INFO L130 PetriNetUnfolder]: 199178/283337 cut-off events. [2023-08-30 18:19:30,151 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-08-30 18:19:30,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544756 conditions, 283337 events. 199178/283337 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7636. Compared 2268124 event pairs, 188343 based on Foata normal form. 51888/290822 useless extension candidates. Maximal degree in co-relation 50656. Up to 259483 conditions per place. [2023-08-30 18:19:31,474 INFO L137 encePairwiseOnDemand]: 574/619 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-30 18:19:31,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-08-30 18:19:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:19:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:19:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 936 transitions. [2023-08-30 18:19:31,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040387722132472 [2023-08-30 18:19:31,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 936 transitions. [2023-08-30 18:19:31,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 936 transitions. [2023-08-30 18:19:31,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:31,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 936 transitions. [2023-08-30 18:19:31,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 18:19:31,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:31,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:31,478 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 936 transitions. [2023-08-30 18:19:31,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-08-30 18:19:31,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:19:31,480 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-08-30 18:19:31,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-08-30 18:19:31,481 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-30 18:19:31,481 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-08-30 18:19:31,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 18:19:31,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:31,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:19:31,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 18:19:31,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:19:31,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1341187382, now seen corresponding path program 1 times [2023-08-30 18:19:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:31,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140509471] [2023-08-30 18:19:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:31,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:19:31,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:31,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140509471] [2023-08-30 18:19:31,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140509471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:31,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869796661] [2023-08-30 18:19:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:31,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:31,506 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:31,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 18:19:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 18:19:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:19:31,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:19:31,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869796661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:19:31,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:19:31,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 18:19:31,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440901457] [2023-08-30 18:19:31,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:19:31,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:19:31,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:31,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:19:31,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:19:31,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 619 [2023-08-30 18:19:31,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 18:19:31,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:31,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 619 [2023-08-30 18:19:31,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:19:47,516 INFO L130 PetriNetUnfolder]: 199267/282260 cut-off events. [2023-08-30 18:19:47,517 INFO L131 PetriNetUnfolder]: For 3088/3088 co-relation queries the response was YES. [2023-08-30 18:19:47,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543726 conditions, 282260 events. 199267/282260 cut-off events. For 3088/3088 co-relation queries the response was YES. Maximal size of possible extension queue 7587. Compared 2239090 event pairs, 123187 based on Foata normal form. 0/237982 useless extension candidates. Maximal degree in co-relation 543712. Up to 259453 conditions per place. [2023-08-30 18:19:48,722 INFO L137 encePairwiseOnDemand]: 616/619 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-30 18:19:48,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-08-30 18:19:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:19:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:19:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 909 transitions. [2023-08-30 18:19:48,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894991922455573 [2023-08-30 18:19:48,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 909 transitions. [2023-08-30 18:19:48,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 909 transitions. [2023-08-30 18:19:48,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:19:48,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 909 transitions. [2023-08-30 18:19:48,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.0) internal successors, (909), 3 states have internal predecessors, (909), 0 states have call successors, (0), 0 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 18:19:48,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:48,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:19:48,727 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 909 transitions. [2023-08-30 18:19:48,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-08-30 18:19:48,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:19:48,730 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-08-30 18:19:48,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-08-30 18:19:48,730 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-30 18:19:48,731 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-08-30 18:19:48,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 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 18:19:48,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:19:48,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:19:48,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 18:19:48,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 18:19:48,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:19:48,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:19:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash -545458772, now seen corresponding path program 1 times [2023-08-30 18:19:48,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:19:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677470553] [2023-08-30 18:19:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:19:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:19:48,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:19:48,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677470553] [2023-08-30 18:19:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677470553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:19:48,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565258935] [2023-08-30 18:19:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:19:48,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:19:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:19:48,968 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:19:48,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 18:19:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:19:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:19:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:19:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:19:49,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:19:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:19:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565258935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:19:49,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:19:49,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:19:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554511341] [2023-08-30 18:19:49,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:19:49,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:19:49,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:19:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:19:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:19:49,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 619 [2023-08-30 18:19:49,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 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 18:19:49,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:19:49,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 619 [2023-08-30 18:19:49,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:20:05,953 INFO L130 PetriNetUnfolder]: 200915/283582 cut-off events. [2023-08-30 18:20:05,953 INFO L131 PetriNetUnfolder]: For 10256/10256 co-relation queries the response was YES. [2023-08-30 18:20:06,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7575. Compared 2229107 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-08-30 18:20:07,243 INFO L137 encePairwiseOnDemand]: 616/619 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-30 18:20:07,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-08-30 18:20:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:20:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:20:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1715 transitions. [2023-08-30 18:20:07,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176628971459344 [2023-08-30 18:20:07,245 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1715 transitions. [2023-08-30 18:20:07,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1715 transitions. [2023-08-30 18:20:07,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:20:07,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1715 transitions. [2023-08-30 18:20:07,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.8333333333333) internal successors, (1715), 6 states have internal predecessors, (1715), 0 states have call successors, (0), 0 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 18:20:07,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:20:07,248 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:20:07,248 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1715 transitions. [2023-08-30 18:20:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-08-30 18:20:07,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:20:07,255 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-08-30 18:20:07,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-08-30 18:20:07,256 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-08-30 18:20:07,256 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-08-30 18:20:07,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 0 states have call successors, (0), 0 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 18:20:07,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:20:07,257 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:20:07,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 18:20:07,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 18:20:07,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:20:07,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:20:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1815114261, now seen corresponding path program 2 times [2023-08-30 18:20:07,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:20:07,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152308625] [2023-08-30 18:20:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:20:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:20:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:20:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:20:07,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:20:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152308625] [2023-08-30 18:20:07,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152308625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:20:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597807399] [2023-08-30 18:20:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:20:07,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:20:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:20:07,525 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:20:07,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 18:20:07,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:20:07,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:20:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 18:20:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:20:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:20:07,710 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:20:07,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:20:07,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:20:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:20:07,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:20:07,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597807399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:20:07,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:20:07,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 18:20:07,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923281668] [2023-08-30 18:20:07,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:20:07,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:20:07,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:20:07,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:20:07,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:20:07,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 619 [2023-08-30 18:20:07,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 263.3333333333333) internal successors, (1580), 6 states have internal predecessors, (1580), 0 states have call successors, (0), 0 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 18:20:07,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:20:07,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 619 [2023-08-30 18:20:07,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:20:25,722 INFO L130 PetriNetUnfolder]: 204571/291493 cut-off events. [2023-08-30 18:20:25,722 INFO L131 PetriNetUnfolder]: For 10820/10820 co-relation queries the response was YES. [2023-08-30 18:20:26,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571332 conditions, 291493 events. 204571/291493 cut-off events. For 10820/10820 co-relation queries the response was YES. Maximal size of possible extension queue 8470. Compared 2365972 event pairs, 44899 based on Foata normal form. 0/254598 useless extension candidates. Maximal degree in co-relation 571295. Up to 234044 conditions per place. [2023-08-30 18:20:27,664 INFO L137 encePairwiseOnDemand]: 607/619 looper letters, 184 selfloop transitions, 18 changer transitions 0/221 dead transitions. [2023-08-30 18:20:27,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 221 transitions, 971 flow [2023-08-30 18:20:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:20:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:20:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1779 transitions. [2023-08-30 18:20:27,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789983844911147 [2023-08-30 18:20:27,667 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1779 transitions. [2023-08-30 18:20:27,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1779 transitions. [2023-08-30 18:20:27,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:20:27,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1779 transitions. [2023-08-30 18:20:27,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 296.5) internal successors, (1779), 6 states have internal predecessors, (1779), 0 states have call successors, (0), 0 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 18:20:27,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:20:27,671 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:20:27,671 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1779 transitions. [2023-08-30 18:20:27,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 221 transitions, 971 flow [2023-08-30 18:20:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 221 transitions, 957 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:20:27,683 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2023-08-30 18:20:27,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-08-30 18:20:27,684 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2023-08-30 18:20:27,684 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2023-08-30 18:20:27,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 263.3333333333333) internal successors, (1580), 6 states have internal predecessors, (1580), 0 states have call successors, (0), 0 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 18:20:27,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:20:27,685 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:20:27,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 18:20:27,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-30 18:20:27,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:20:27,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:20:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1368982061, now seen corresponding path program 1 times [2023-08-30 18:20:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:20:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389344191] [2023-08-30 18:20:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:20:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:20:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:20:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:20:27,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:20:27,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389344191] [2023-08-30 18:20:27,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389344191] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:20:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489791240] [2023-08-30 18:20:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:20:27,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:20:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:20:27,969 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:20:27,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 18:20:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:20:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:20:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:20:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:20:28,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:20:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:20:28,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489791240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:20:28,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:20:28,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 18:20:28,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721293681] [2023-08-30 18:20:28,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:20:28,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:20:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:20:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:20:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:20:28,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 619 [2023-08-30 18:20:28,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 14 states, 14 states have (on average 272.07142857142856) internal successors, (3809), 14 states have internal predecessors, (3809), 0 states have call successors, (0), 0 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 18:20:28,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:20:28,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 619 [2023-08-30 18:20:28,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:20:48,680 INFO L130 PetriNetUnfolder]: 205511/290481 cut-off events. [2023-08-30 18:20:48,680 INFO L131 PetriNetUnfolder]: For 116346/116346 co-relation queries the response was YES. [2023-08-30 18:20:49,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649417 conditions, 290481 events. 205511/290481 cut-off events. For 116346/116346 co-relation queries the response was YES. Maximal size of possible extension queue 8509. Compared 2325489 event pairs, 62524 based on Foata normal form. 21/271113 useless extension candidates. Maximal degree in co-relation 649357. Up to 272345 conditions per place. [2023-08-30 18:20:50,463 INFO L137 encePairwiseOnDemand]: 614/619 looper letters, 131 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2023-08-30 18:20:50,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 164 transitions, 837 flow [2023-08-30 18:20:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:20:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:20:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3912 transitions. [2023-08-30 18:20:50,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45141933994922684 [2023-08-30 18:20:50,466 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3912 transitions. [2023-08-30 18:20:50,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3912 transitions. [2023-08-30 18:20:50,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:20:50,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3912 transitions. [2023-08-30 18:20:50,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 279.42857142857144) internal successors, (3912), 14 states have internal predecessors, (3912), 0 states have call successors, (0), 0 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 18:20:50,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 619.0) internal successors, (9285), 15 states have internal predecessors, (9285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:20:50,473 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 619.0) internal successors, (9285), 15 states have internal predecessors, (9285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:20:50,473 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 14 states and 3912 transitions. [2023-08-30 18:20:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 164 transitions, 837 flow [2023-08-30 18:20:50,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 164 transitions, 837 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:20:50,983 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 451 flow [2023-08-30 18:20:50,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=451, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2023-08-30 18:20:50,984 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 34 predicate places. [2023-08-30 18:20:50,984 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 451 flow [2023-08-30 18:20:50,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 272.07142857142856) internal successors, (3809), 14 states have internal predecessors, (3809), 0 states have call successors, (0), 0 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 18:20:50,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:20:50,985 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:20:50,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 18:20:51,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:20:51,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:20:51,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:20:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash 200015773, now seen corresponding path program 1 times [2023-08-30 18:20:51,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:20:51,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642888664] [2023-08-30 18:20:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:20:51,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:20:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:20:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:20:51,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:20:51,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642888664] [2023-08-30 18:20:51,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642888664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:20:51,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:20:51,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:20:51,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270577867] [2023-08-30 18:20:51,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:20:51,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:20:51,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:20:51,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:20:51,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:20:51,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 619 [2023-08-30 18:20:51,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 250.4) internal successors, (1252), 5 states have internal predecessors, (1252), 0 states have call successors, (0), 0 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 18:20:51,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:20:51,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 619 [2023-08-30 18:20:51,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:21:02,763 INFO L130 PetriNetUnfolder]: 101596/162200 cut-off events. [2023-08-30 18:21:02,763 INFO L131 PetriNetUnfolder]: For 62124/62124 co-relation queries the response was YES. [2023-08-30 18:21:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367574 conditions, 162200 events. 101596/162200 cut-off events. For 62124/62124 co-relation queries the response was YES. Maximal size of possible extension queue 4498. Compared 1457250 event pairs, 40755 based on Foata normal form. 27565/174173 useless extension candidates. Maximal degree in co-relation 367500. Up to 84913 conditions per place. [2023-08-30 18:21:03,612 INFO L137 encePairwiseOnDemand]: 591/619 looper letters, 150 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2023-08-30 18:21:03,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 193 transitions, 1086 flow [2023-08-30 18:21:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:21:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:21:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1132 transitions. [2023-08-30 18:21:03,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45718901453957994 [2023-08-30 18:21:03,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1132 transitions. [2023-08-30 18:21:03,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1132 transitions. [2023-08-30 18:21:03,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:21:03,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1132 transitions. [2023-08-30 18:21:03,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 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 18:21:03,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 619.0) internal successors, (3095), 5 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:21:03,615 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 619.0) internal successors, (3095), 5 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:21:03,616 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 451 flow. Second operand 4 states and 1132 transitions. [2023-08-30 18:21:03,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 193 transitions, 1086 flow [2023-08-30 18:21:03,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 193 transitions, 1013 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-08-30 18:21:03,787 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 524 flow [2023-08-30 18:21:03,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2023-08-30 18:21:03,787 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 28 predicate places. [2023-08-30 18:21:03,787 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 524 flow [2023-08-30 18:21:03,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.4) internal successors, (1252), 5 states have internal predecessors, (1252), 0 states have call successors, (0), 0 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 18:21:03,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:21:03,788 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:21:03,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-30 18:21:03,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:21:03,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:21:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1155192965, now seen corresponding path program 1 times [2023-08-30 18:21:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:21:03,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593521671] [2023-08-30 18:21:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:21:03,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:21:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:21:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:21:04,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:21:04,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593521671] [2023-08-30 18:21:04,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593521671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:21:04,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830971721] [2023-08-30 18:21:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:21:04,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:21:04,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:21:04,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:21:04,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 18:21:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:21:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:21:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:21:04,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:21:04,251 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:21:04,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:21:04,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:21:04,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:21:04,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:21:04,346 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:21:04,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:21:04,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:21:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:21:04,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:21:04,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-08-30 18:21:04,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-08-30 18:21:08,054 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int)) (|v_t_funThread1of3ForFork0_~i~0#1_87| Int) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2347) |c_~#a~0.base|) (+ (* |v_t_funThread1of3ForFork0_~i~0#1_87| 28) |~#a~0.offset|)) 0)) is different from false [2023-08-30 18:21:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:21:08,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830971721] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:21:08,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:21:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-30 18:21:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616081886] [2023-08-30 18:21:08,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:21:08,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:21:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:21:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:21:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=172, Unknown=2, NotChecked=28, Total=272 [2023-08-30 18:21:08,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 619 [2023-08-30 18:21:08,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 524 flow. Second operand has 17 states, 17 states have (on average 196.64705882352942) internal successors, (3343), 17 states have internal predecessors, (3343), 0 states have call successors, (0), 0 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 18:21:08,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:21:08,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 619 [2023-08-30 18:21:08,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:21:29,386 INFO L130 PetriNetUnfolder]: 183777/285699 cut-off events. [2023-08-30 18:21:29,387 INFO L131 PetriNetUnfolder]: For 161877/162340 co-relation queries the response was YES. [2023-08-30 18:21:30,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781086 conditions, 285699 events. 183777/285699 cut-off events. For 161877/162340 co-relation queries the response was YES. Maximal size of possible extension queue 6835. Compared 2602463 event pairs, 32550 based on Foata normal form. 546/258129 useless extension candidates. Maximal degree in co-relation 736789. Up to 139454 conditions per place. [2023-08-30 18:21:30,935 INFO L137 encePairwiseOnDemand]: 595/619 looper letters, 548 selfloop transitions, 101 changer transitions 12/672 dead transitions. [2023-08-30 18:21:30,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 672 transitions, 3896 flow [2023-08-30 18:21:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:21:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:21:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3270 transitions. [2023-08-30 18:21:30,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377336718209093 [2023-08-30 18:21:30,938 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3270 transitions. [2023-08-30 18:21:30,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3270 transitions. [2023-08-30 18:21:30,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:21:30,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3270 transitions. [2023-08-30 18:21:30,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 233.57142857142858) internal successors, (3270), 14 states have internal predecessors, (3270), 0 states have call successors, (0), 0 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 18:21:30,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 619.0) internal successors, (9285), 15 states have internal predecessors, (9285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:21:30,945 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 619.0) internal successors, (9285), 15 states have internal predecessors, (9285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:21:30,945 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 524 flow. Second operand 14 states and 3270 transitions. [2023-08-30 18:21:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 672 transitions, 3896 flow [2023-08-30 18:21:34,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 672 transitions, 3895 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:21:34,498 INFO L231 Difference]: Finished difference. Result has 137 places, 215 transitions, 1330 flow [2023-08-30 18:21:34,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1330, PETRI_PLACES=137, PETRI_TRANSITIONS=215} [2023-08-30 18:21:34,499 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 49 predicate places. [2023-08-30 18:21:34,499 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 215 transitions, 1330 flow [2023-08-30 18:21:34,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 196.64705882352942) internal successors, (3343), 17 states have internal predecessors, (3343), 0 states have call successors, (0), 0 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 18:21:34,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:21:34,500 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:21:34,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 18:21:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 18:21:34,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:21:34,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:21:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2111600955, now seen corresponding path program 2 times [2023-08-30 18:21:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:21:34,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39689478] [2023-08-30 18:21:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:21:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:21:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:21:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:21:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:21:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39689478] [2023-08-30 18:21:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39689478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:21:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860222669] [2023-08-30 18:21:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:21:34,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:21:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:21:34,969 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:21:34,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 18:21:35,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:21:35,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:21:35,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 18:21:35,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:21:35,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:21:35,285 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:21:35,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:21:35,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:21:35,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:21:35,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:21:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:21:35,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:21:35,453 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:21:35,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:21:35,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:21:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:21:35,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:21:35,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:21:35,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:21:35,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:21:35,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:21:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:21:35,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:21:35,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:21:35,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2023-08-30 18:21:41,529 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread1of3ForFork0_~i~0#1_89| Int) (v_ArrVal_2432 (Array Int Int)) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2432) |c_~#a~0.base|) (+ (* |v_t_funThread1of3ForFork0_~i~0#1_89| 28) |~#a~0.offset|)) 0))) is different from false [2023-08-30 18:21:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:21:44,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860222669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:21:44,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:21:44,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 18:21:44,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431501321] [2023-08-30 18:21:44,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:21:44,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:21:44,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:21:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:21:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=287, Unknown=2, NotChecked=36, Total=420 [2023-08-30 18:21:44,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 619 [2023-08-30 18:21:44,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 215 transitions, 1330 flow. Second operand has 21 states, 21 states have (on average 195.33333333333334) internal successors, (4102), 21 states have internal predecessors, (4102), 0 states have call successors, (0), 0 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 18:21:44,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:21:44,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 619 [2023-08-30 18:21:44,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:21:47,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 18:22:30,452 INFO L130 PetriNetUnfolder]: 263812/409674 cut-off events. [2023-08-30 18:22:30,452 INFO L131 PetriNetUnfolder]: For 886690/887512 co-relation queries the response was YES. [2023-08-30 18:22:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1414619 conditions, 409674 events. 263812/409674 cut-off events. For 886690/887512 co-relation queries the response was YES. Maximal size of possible extension queue 10455. Compared 3884572 event pairs, 43375 based on Foata normal form. 806/370321 useless extension candidates. Maximal degree in co-relation 1348183. Up to 170355 conditions per place. [2023-08-30 18:22:33,215 INFO L137 encePairwiseOnDemand]: 587/619 looper letters, 750 selfloop transitions, 274 changer transitions 66/1101 dead transitions. [2023-08-30 18:22:33,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1101 transitions, 8517 flow [2023-08-30 18:22:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:22:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:22:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4652 transitions. [2023-08-30 18:22:33,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37576736672051697 [2023-08-30 18:22:33,219 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4652 transitions. [2023-08-30 18:22:33,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4652 transitions. [2023-08-30 18:22:33,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:22:33,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4652 transitions. [2023-08-30 18:22:33,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 232.6) internal successors, (4652), 20 states have internal predecessors, (4652), 0 states have call successors, (0), 0 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 18:22:33,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 619.0) internal successors, (12999), 21 states have internal predecessors, (12999), 0 states have call successors, (0), 0 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 18:22:33,229 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 619.0) internal successors, (12999), 21 states have internal predecessors, (12999), 0 states have call successors, (0), 0 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 18:22:33,229 INFO L175 Difference]: Start difference. First operand has 137 places, 215 transitions, 1330 flow. Second operand 20 states and 4652 transitions. [2023-08-30 18:22:33,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1101 transitions, 8517 flow [2023-08-30 18:23:22,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 1101 transitions, 8517 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:23:22,825 INFO L231 Difference]: Finished difference. Result has 173 places, 451 transitions, 4565 flow [2023-08-30 18:23:22,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4565, PETRI_PLACES=173, PETRI_TRANSITIONS=451} [2023-08-30 18:23:22,826 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 85 predicate places. [2023-08-30 18:23:22,826 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 451 transitions, 4565 flow [2023-08-30 18:23:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 195.33333333333334) internal successors, (4102), 21 states have internal predecessors, (4102), 0 states have call successors, (0), 0 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 18:23:22,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:23:22,827 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:23:22,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 18:23:23,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:23:23,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:23:23,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:23:23,033 INFO L85 PathProgramCache]: Analyzing trace with hash 46727167, now seen corresponding path program 1 times [2023-08-30 18:23:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:23:23,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954064564] [2023-08-30 18:23:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:23:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:23:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:23:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:23:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:23:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954064564] [2023-08-30 18:23:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954064564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:23:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245496730] [2023-08-30 18:23:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:23:23,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:23:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:23:23,314 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:23:23,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 18:23:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:23:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 18:23:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:23:23,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 18:23:23,623 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:23:23,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 18:23:23,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:23:23,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:23:23,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-30 18:23:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:23:23,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 18:23:23,801 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:23:23,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-08-30 18:23:23,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 18:23:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:23:23,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:23:24,031 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_t_funThread1of3ForFork0_~i~0#1| 1) (<= 10 |c_t_funThread1of3ForFork0_~i~0#1|) (forall ((v_ArrVal_2521 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_2521) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread1of3ForFork0_~i~0#1| 28) (- 24))) 0)))) (forall ((|v_t_funThread2of3ForFork0_~i~0#1_87| Int) (v_ArrVal_2521 (Array Int Int))) (let ((.cse0 (* 28 |v_t_funThread2of3ForFork0_~i~0#1_87|))) (or (< |v_t_funThread2of3ForFork0_~i~0#1_87| 1) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (<= 10 |v_t_funThread2of3ForFork0_~i~0#1_87|) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_2521) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)))))) is different from false [2023-08-30 18:23:24,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:23:24,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:23:24,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:23:24,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-08-30 18:23:24,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-08-30 18:23:24,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:23:24,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 18:23:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2023-08-30 18:23:42,198 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of3ForFork0_~i~0#1_87| Int) (|~#a~0.offset| Int) (v_ArrVal_2518 (Array Int Int))) (or (< |v_t_funThread2of3ForFork0_~i~0#1_87| 1) (<= 10 |v_t_funThread2of3ForFork0_~i~0#1_87|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2518) |c_~#a~0.base|) (+ |~#a~0.offset| (* 28 |v_t_funThread2of3ForFork0_~i~0#1_87|))) 0)))) is different from false [2023-08-30 18:23:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-30 18:23:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245496730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:23:45,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:23:45,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 18:23:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645564228] [2023-08-30 18:23:45,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:23:45,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:23:45,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:23:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:23:45,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=258, Unknown=7, NotChecked=70, Total=420 [2023-08-30 18:23:45,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 619 [2023-08-30 18:23:45,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 451 transitions, 4565 flow. Second operand has 21 states, 21 states have (on average 195.33333333333334) internal successors, (4102), 21 states have internal predecessors, (4102), 0 states have call successors, (0), 0 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 18:23:45,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:23:45,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 619 [2023-08-30 18:23:45,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15