./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --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 17:57:05,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:57:05,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:57:05,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:57:05,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:57:05,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:57:05,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:57:05,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:57:05,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:57:05,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:57:05,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:57:05,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:57:05,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:57:05,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:57:05,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:57:05,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:57:05,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:57:05,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:57:05,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:57:05,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:57:05,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:57:05,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:57:05,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:57:05,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:57:05,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:57:05,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:57:05,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:57:05,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:57:05,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:57:05,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:57:05,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:57:05,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:57:05,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:57:05,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:57:05,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:57:05,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:57:05,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:57:05,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:57:05,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:57:05,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:57:05,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:57:05,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:57:05,560 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:57:05,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:57:05,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:57:05,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:57:05,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:57:05,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:57:05,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:57:05,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:57:05,564 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:57:05,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:57:05,565 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:57:05,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:57:05,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:57:05,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:57:05,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:57:05,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:57:05,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:57:05,566 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:57:05,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:57:05,566 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:57:05,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:57:05,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:57:05,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:57:05,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:57:05,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:57:05,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:57:05,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:57:05,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:57:05,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:57:05,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:57:05,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:57:05,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:57:05,569 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:57:05,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:57:05,569 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:57:05,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:57:05,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:57:05,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:57:05,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:57:05,910 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:57:05,911 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:57:05,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-30 17:57:07,143 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:57:07,388 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:57:07,392 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-30 17:57:07,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2df3232c2/63fd73c8512842fe8d463b68708de60b/FLAGd7ddc6025 [2023-08-30 17:57:07,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2df3232c2/63fd73c8512842fe8d463b68708de60b [2023-08-30 17:57:07,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:57:07,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:57:07,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:57:07,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:57:07,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:57:07,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:57:07" (1/1) ... [2023-08-30 17:57:07,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b8ee68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:07, skipping insertion in model container [2023-08-30 17:57:07,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:57:07" (1/1) ... [2023-08-30 17:57:07,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:57:07,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:57:07,893 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_70-funloop_racefree.i[41323,41336] [2023-08-30 17:57:07,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:57:07,946 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:57:07,989 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_70-funloop_racefree.i[41323,41336] [2023-08-30 17:57:08,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:57:08,075 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:57:08,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08 WrapperNode [2023-08-30 17:57:08,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:57:08,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:57:08,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:57:08,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:57:08,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,146 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-08-30 17:57:08,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:57:08,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:57:08,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:57:08,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:57:08,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,196 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:57:08,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:57:08,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:57:08,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:57:08,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (1/1) ... [2023-08-30 17:57:08,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:57:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:08,242 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 17:57:08,266 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 17:57:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:57:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:57:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:57:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:57:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:57:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:57:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:57:08,281 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:57:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:57:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:57:08,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:57:08,283 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 17:57:08,477 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:57:08,479 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:57:08,680 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:57:08,688 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:57:08,688 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-30 17:57:08,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:57:08 BoogieIcfgContainer [2023-08-30 17:57:08,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:57:08,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:57:08,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:57:08,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:57:08,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:57:07" (1/3) ... [2023-08-30 17:57:08,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f2e7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:57:08, skipping insertion in model container [2023-08-30 17:57:08,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:08" (2/3) ... [2023-08-30 17:57:08,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f2e7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:57:08, skipping insertion in model container [2023-08-30 17:57:08,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:57:08" (3/3) ... [2023-08-30 17:57:08,699 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-30 17:57:08,706 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:57:08,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:57:08,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 17:57:08,715 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:57:08,827 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:57:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 192 transitions, 392 flow [2023-08-30 17:57:08,930 INFO L130 PetriNetUnfolder]: 49/273 cut-off events. [2023-08-30 17:57:08,931 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:57:08,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 49/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 975 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-30 17:57:08,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 192 transitions, 392 flow [2023-08-30 17:57:08,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 187 transitions, 379 flow [2023-08-30 17:57:08,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:08,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 187 transitions, 379 flow [2023-08-30 17:57:08,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 187 transitions, 379 flow [2023-08-30 17:57:08,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 187 transitions, 379 flow [2023-08-30 17:57:08,994 INFO L130 PetriNetUnfolder]: 48/268 cut-off events. [2023-08-30 17:57:08,995 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 48/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 917 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-30 17:57:09,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 12006 [2023-08-30 17:57:11,455 INFO L134 LiptonReduction]: Checked pairs total: 18220 [2023-08-30 17:57:11,456 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-30 17:57:11,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:57:11,473 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;@5fd31077, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:11,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 17:57:11,479 INFO L130 PetriNetUnfolder]: 9/29 cut-off events. [2023-08-30 17:57:11,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:11,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:11,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:11,480 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 17:57:11,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash -939429078, now seen corresponding path program 1 times [2023-08-30 17:57:11,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126490718] [2023-08-30 17:57:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:11,740 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 17:57:11,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:11,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126490718] [2023-08-30 17:57:11,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126490718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:11,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:57:11,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:57:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859755459] [2023-08-30 17:57:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:11,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:57:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:57:11,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:57:11,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-30 17:57:11,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:11,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:11,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-30 17:57:11,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:11,982 INFO L130 PetriNetUnfolder]: 380/772 cut-off events. [2023-08-30 17:57:11,982 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:11,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3513 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-08-30 17:57:11,988 INFO L137 encePairwiseOnDemand]: 316/342 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-30 17:57:11,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 185 flow [2023-08-30 17:57:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:57:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:57:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-30 17:57:12,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233918128654971 [2023-08-30 17:57:12,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-30 17:57:12,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-30 17:57:12,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:12,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-30 17:57:12,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,020 INFO L175 Difference]: Start difference. First operand has 46 places, 70 transitions, 145 flow. Second operand 3 states and 537 transitions. [2023-08-30 17:57:12,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 185 flow [2023-08-30 17:57:12,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 185 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:57:12,024 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 111 flow [2023-08-30 17:57:12,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-30 17:57:12,031 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-30 17:57:12,031 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 111 flow [2023-08-30 17:57:12,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:12,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:12,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:57:12,032 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 17:57:12,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1428636333, now seen corresponding path program 1 times [2023-08-30 17:57:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988243180] [2023-08-30 17:57:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:12,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:12,107 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 17:57:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988243180] [2023-08-30 17:57:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988243180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506912414] [2023-08-30 17:57:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:12,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:12,112 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 17:57:12,121 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 17:57:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 17:57:12,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:12,211 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 17:57:12,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 17:57:12,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506912414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:12,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 17:57:12,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 17:57:12,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54125389] [2023-08-30 17:57:12,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:12,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:57:12,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:57:12,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 17:57:12,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-30 17:57:12,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 111 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 17:57:12,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:12,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-30 17:57:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:12,431 INFO L130 PetriNetUnfolder]: 363/764 cut-off events. [2023-08-30 17:57:12,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 764 events. 363/764 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3863 event pairs, 0 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 1472. Up to 670 conditions per place. [2023-08-30 17:57:12,435 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 59 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 17:57:12,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 271 flow [2023-08-30 17:57:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:57:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:57:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-08-30 17:57:12,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-30 17:57:12,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-08-30 17:57:12,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-08-30 17:57:12,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:12,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-08-30 17:57:12,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,443 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 111 flow. Second operand 3 states and 532 transitions. [2023-08-30 17:57:12,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 271 flow [2023-08-30 17:57:12,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 267 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:57:12,446 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 115 flow [2023-08-30 17:57:12,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-30 17:57:12,447 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-30 17:57:12,447 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 115 flow [2023-08-30 17:57:12,448 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 17:57:12,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:12,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:12,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:57:12,653 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 17:57:12,654 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 17:57:12,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:12,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1309660468, now seen corresponding path program 1 times [2023-08-30 17:57:12,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:12,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039893929] [2023-08-30 17:57:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:12,730 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 17:57:12,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039893929] [2023-08-30 17:57:12,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039893929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402756204] [2023-08-30 17:57:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:12,733 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 17:57:12,738 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 17:57:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:57:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:12,832 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 17:57:12,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:57:12,855 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 17:57:12,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402756204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:57:12,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:57:12,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:57:12,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966943113] [2023-08-30 17:57:12,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:57:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:57:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:57:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:57:12,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-30 17:57:12,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 158.14285714285714) internal successors, (1107), 7 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:12,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:12,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-30 17:57:12,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:13,037 INFO L130 PetriNetUnfolder]: 380/759 cut-off events. [2023-08-30 17:57:13,037 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 17:57:13,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 759 events. 380/759 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3354 event pairs, 306 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 1496. Up to 690 conditions per place. [2023-08-30 17:57:13,041 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 40 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-08-30 17:57:13,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 217 flow [2023-08-30 17:57:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:57:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:57:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-30 17:57:13,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2023-08-30 17:57:13,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-30 17:57:13,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-30 17:57:13,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:13,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-30 17:57:13,049 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 17:57:13,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:13,054 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:13,054 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 115 flow. Second operand 6 states and 984 transitions. [2023-08-30 17:57:13,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 217 flow [2023-08-30 17:57:13,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:57:13,058 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 147 flow [2023-08-30 17:57:13,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-30 17:57:13,059 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-30 17:57:13,059 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 147 flow [2023-08-30 17:57:13,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.14285714285714) internal successors, (1107), 7 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:13,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:13,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:13,067 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 17:57:13,266 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 17:57:13,267 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 17:57:13,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash -101648093, now seen corresponding path program 2 times [2023-08-30 17:57:13,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:13,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563042740] [2023-08-30 17:57:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:13,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:13,417 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 17:57:13,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563042740] [2023-08-30 17:57:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563042740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:13,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851784216] [2023-08-30 17:57:13,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 17:57:13,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:13,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:13,419 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 17:57:13,436 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 17:57:13,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 17:57:13,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:57:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 17:57:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:13,561 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 17:57:13,631 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 17:57:13,632 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 17:57:13,662 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 17:57:13,713 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 17:57:13,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 17:57:13,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851784216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:13,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 17:57:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 17:57:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825445260] [2023-08-30 17:57:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:57:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:57:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-30 17:57:13,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 342 [2023-08-30 17:57:13,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 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 17:57:13,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:13,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 342 [2023-08-30 17:57:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:14,076 INFO L130 PetriNetUnfolder]: 560/1141 cut-off events. [2023-08-30 17:57:14,076 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 17:57:14,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2286 conditions, 1141 events. 560/1141 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5652 event pairs, 65 based on Foata normal form. 0/955 useless extension candidates. Maximal degree in co-relation 2251. Up to 684 conditions per place. [2023-08-30 17:57:14,103 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 83 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2023-08-30 17:57:14,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 419 flow [2023-08-30 17:57:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:57:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:57:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 826 transitions. [2023-08-30 17:57:14,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830409356725146 [2023-08-30 17:57:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 826 transitions. [2023-08-30 17:57:14,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 826 transitions. [2023-08-30 17:57:14,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:14,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 826 transitions. [2023-08-30 17:57:14,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,113 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 147 flow. Second operand 5 states and 826 transitions. [2023-08-30 17:57:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 419 flow [2023-08-30 17:57:14,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 405 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 17:57:14,117 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 167 flow [2023-08-30 17:57:14,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-30 17:57:14,119 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-08-30 17:57:14,119 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 167 flow [2023-08-30 17:57:14,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.66666666666666) internal successors, (898), 6 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 17:57:14,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:14,120 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:14,139 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 17:57:14,325 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 17:57:14,326 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 17:57:14,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1331480674, now seen corresponding path program 1 times [2023-08-30 17:57:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097963376] [2023-08-30 17:57:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:14,370 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 17:57:14,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097963376] [2023-08-30 17:57:14,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097963376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014381949] [2023-08-30 17:57:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:14,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:14,372 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 17:57:14,396 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 17:57:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:57:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:14,487 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 17:57:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:57:14,537 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 17:57:14,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014381949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:57:14,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:57:14,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 17:57:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674967747] [2023-08-30 17:57:14,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:57:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 17:57:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 17:57:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 17:57:14,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 342 [2023-08-30 17:57:14,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 167 flow. Second operand has 14 states, 14 states have (on average 154.92857142857142) internal successors, (2169), 14 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:14,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 342 [2023-08-30 17:57:14,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:14,707 INFO L130 PetriNetUnfolder]: 67/201 cut-off events. [2023-08-30 17:57:14,708 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-08-30 17:57:14,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 201 events. 67/201 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 679 event pairs, 1 based on Foata normal form. 36/231 useless extension candidates. Maximal degree in co-relation 435. Up to 123 conditions per place. [2023-08-30 17:57:14,709 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 42 selfloop transitions, 13 changer transitions 2/60 dead transitions. [2023-08-30 17:57:14,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 318 flow [2023-08-30 17:57:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 17:57:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 17:57:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2202 transitions. [2023-08-30 17:57:14,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598997493734336 [2023-08-30 17:57:14,714 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2202 transitions. [2023-08-30 17:57:14,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2202 transitions. [2023-08-30 17:57:14,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:14,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2202 transitions. [2023-08-30 17:57:14,739 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 17:57:14,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,747 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,747 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 167 flow. Second operand 14 states and 2202 transitions. [2023-08-30 17:57:14,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 318 flow [2023-08-30 17:57:14,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 311 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:57:14,753 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 169 flow [2023-08-30 17:57:14,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-08-30 17:57:14,755 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-08-30 17:57:14,755 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 169 flow [2023-08-30 17:57:14,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.92857142857142) internal successors, (2169), 14 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:14,756 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] [2023-08-30 17:57:14,766 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 17:57:14,962 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 17:57:14,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:14,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash 76954535, now seen corresponding path program 1 times [2023-08-30 17:57:14,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:14,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664001048] [2023-08-30 17:57:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:15,457 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 17:57:15,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:15,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664001048] [2023-08-30 17:57:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664001048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870556439] [2023-08-30 17:57:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:15,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:15,459 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 17:57:15,477 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 17:57:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 17:57:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:15,584 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 17:57:15,644 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 17:57:15,645 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 17:57:15,665 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 17:57:15,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-08-30 17:57:15,801 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 17:57:15,850 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 17:57:15,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:57:24,113 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 17:57:24,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870556439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:57:24,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:57:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-30 17:57:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703402280] [2023-08-30 17:57:24,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:57:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 17:57:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 17:57:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2023-08-30 17:57:26,154 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 17:57:28,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 17:57:30,201 WARN L539 Checker$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 17:57:32,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 17:57:34,470 WARN L539 Checker$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 17:57:36,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 17:57:38,493 WARN L539 Checker$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 17:57:40,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 17:57:42,563 WARN L539 Checker$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 17:57:44,582 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 17:57:44,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 342 [2023-08-30 17:57:44,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 169 flow. Second operand has 22 states, 22 states have (on average 116.68181818181819) internal successors, (2567), 22 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:44,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:44,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 342 [2023-08-30 17:57:44,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:45,055 INFO L130 PetriNetUnfolder]: 59/182 cut-off events. [2023-08-30 17:57:45,055 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-08-30 17:57:45,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 182 events. 59/182 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 483 event pairs, 2 based on Foata normal form. 3/178 useless extension candidates. Maximal degree in co-relation 384. Up to 38 conditions per place. [2023-08-30 17:57:45,056 INFO L137 encePairwiseOnDemand]: 330/342 looper letters, 55 selfloop transitions, 22 changer transitions 3/83 dead transitions. [2023-08-30 17:57:45,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 445 flow [2023-08-30 17:57:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 17:57:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 17:57:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1667 transitions. [2023-08-30 17:57:45,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481620718462824 [2023-08-30 17:57:45,062 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1667 transitions. [2023-08-30 17:57:45,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1667 transitions. [2023-08-30 17:57:45,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:45,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1667 transitions. [2023-08-30 17:57:45,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 119.07142857142857) internal successors, (1667), 14 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:45,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:45,075 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:45,075 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 169 flow. Second operand 14 states and 1667 transitions. [2023-08-30 17:57:45,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 445 flow [2023-08-30 17:57:45,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 368 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-30 17:57:45,078 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 242 flow [2023-08-30 17:57:45,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=242, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-30 17:57:45,080 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-08-30 17:57:45,080 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 242 flow [2023-08-30 17:57:45,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 116.68181818181819) internal successors, (2567), 22 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:45,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:45,082 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:45,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 17:57:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:45,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:45,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash -103875666, now seen corresponding path program 1 times [2023-08-30 17:57:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:45,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884007117] [2023-08-30 17:57:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 17:57:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:46,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884007117] [2023-08-30 17:57:46,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884007117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:46,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983586485] [2023-08-30 17:57:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:46,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:46,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:46,689 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 17:57:46,693 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 17:57:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 17:57:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:46,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-30 17:57:46,878 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 17:57:46,879 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 17:57:46,907 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 17:57:47,038 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 24 treesize of output 17 [2023-08-30 17:57:47,084 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 21 treesize of output 23 [2023-08-30 17:57:47,145 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 17:57:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 17:57:47,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:58:11,294 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62| Int)) (= (select (select (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (store (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|) |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) |c_t_funThread1of1ForFork0_cache_entry_addref_#t~post38#1|))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62|) 0)) is different from false [2023-08-30 17:58:13,300 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62| Int)) (= (select (select (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse0 (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62|) 0)) is different from false [2023-08-30 17:58:13,309 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62| Int) (v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_312))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse1 (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62|) 0)) is different from false [2023-08-30 17:58:13,327 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62| Int) (v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (store (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|) |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ |c_t_funThread1of1ForFork0_cache_entry_addref_#t~post35#1| 1))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_312))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse1 (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse1 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62|) 0)) is different from false [2023-08-30 17:58:15,861 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62| Int) (|t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| Int) (v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse2 (select |c_#memory_int| |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (select .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|) 1)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_312))) (store .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base| (let ((.cse1 (select .cse0 |c_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.base|))) (store .cse1 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse1 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))))) |c_~#cache~0.base|) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62|) 0)) is different from false [2023-08-30 17:58:28,409 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62| Int) (v_ArrVal_309 (Array Int Int)) (|t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| Int) (v_ArrVal_312 (Array Int Int))) (= (select (let ((.cse0 (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_309))) (store .cse1 |c_~#cache~0.base| (let ((.cse2 (select .cse1 |c_~#cache~0.base|))) (store .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (select .cse2 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|) 1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_312) |c_~#cache~0.base|))) (store .cse0 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset| (+ (- 1) (select .cse0 |t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset|)))) |v_t_funThread1of1ForFork0_cache_entry_addref_~entry#1.offset_62|) 0)) is different from false [2023-08-30 17:58:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-30 17:58:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983586485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:58:29,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:58:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 29 [2023-08-30 17:58:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505741539] [2023-08-30 17:58:29,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:58:29,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 17:58:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:58:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 17:58:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=500, Unknown=25, NotChecked=306, Total=930 [2023-08-30 17:58:29,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 342 [2023-08-30 17:58:29,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 242 flow. Second operand has 31 states, 31 states have (on average 111.2258064516129) internal successors, (3448), 31 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:29,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:58:29,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 342 [2023-08-30 17:58:29,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:58:49,097 WARN L222 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 60 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 17:59:11,398 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 32 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 17:59:20,564 INFO L130 PetriNetUnfolder]: 107/359 cut-off events. [2023-08-30 17:59:20,565 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2023-08-30 17:59:20,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 359 events. 107/359 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1544 event pairs, 2 based on Foata normal form. 2/347 useless extension candidates. Maximal degree in co-relation 994. Up to 63 conditions per place. [2023-08-30 17:59:20,566 INFO L137 encePairwiseOnDemand]: 330/342 looper letters, 0 selfloop transitions, 0 changer transitions 168/168 dead transitions. [2023-08-30 17:59:20,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 168 transitions, 1055 flow [2023-08-30 17:59:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 17:59:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 17:59:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3614 transitions. [2023-08-30 17:59:20,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3302266081871345 [2023-08-30 17:59:20,579 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3614 transitions. [2023-08-30 17:59:20,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3614 transitions. [2023-08-30 17:59:20,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:59:20,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3614 transitions. [2023-08-30 17:59:20,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 112.9375) internal successors, (3614), 32 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:20,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 342.0) internal successors, (11286), 33 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:20,610 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 342.0) internal successors, (11286), 33 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:20,610 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 242 flow. Second operand 32 states and 3614 transitions. [2023-08-30 17:59:20,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 168 transitions, 1055 flow [2023-08-30 17:59:20,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 168 transitions, 1014 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 17:59:20,615 INFO L231 Difference]: Finished difference. Result has 88 places, 0 transitions, 0 flow [2023-08-30 17:59:20,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=0, PETRI_PLACES=88, PETRI_TRANSITIONS=0} [2023-08-30 17:59:20,617 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2023-08-30 17:59:20,617 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 0 transitions, 0 flow [2023-08-30 17:59:20,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 111.2258064516129) internal successors, (3448), 31 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:20,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 17:59:20,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 17:59:20,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 17:59:20,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 17:59:20,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:59:20,837 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-08-30 17:59:20,839 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 17:59:20,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 192 transitions, 392 flow [2023-08-30 17:59:20,869 INFO L130 PetriNetUnfolder]: 49/273 cut-off events. [2023-08-30 17:59:20,870 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:59:20,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 49/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 975 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-30 17:59:20,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 192 transitions, 392 flow [2023-08-30 17:59:20,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 187 transitions, 379 flow [2023-08-30 17:59:20,873 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:59:20,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 187 transitions, 379 flow [2023-08-30 17:59:20,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 187 transitions, 379 flow [2023-08-30 17:59:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 187 transitions, 379 flow [2023-08-30 17:59:20,891 INFO L130 PetriNetUnfolder]: 48/268 cut-off events. [2023-08-30 17:59:20,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:59:20,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 48/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 917 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-30 17:59:20,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 12006 [2023-08-30 17:59:37,476 INFO L134 LiptonReduction]: Checked pairs total: 18376 [2023-08-30 17:59:37,476 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-30 17:59:37,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:59:37,478 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;@5fd31077, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:59:37,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:59:37,481 INFO L130 PetriNetUnfolder]: 11/39 cut-off events. [2023-08-30 17:59:37,481 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:59:37,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:59:37,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-30 17:59:37,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:59:37,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:59:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 83790944, now seen corresponding path program 1 times [2023-08-30 17:59:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:59:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822411806] [2023-08-30 17:59:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:59:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:59:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:59:37,542 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 17:59:37,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:59:37,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822411806] [2023-08-30 17:59:37,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822411806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:59:37,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:59:37,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:59:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415592383] [2023-08-30 17:59:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:59:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:59:37,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:59:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:59:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:59:37,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-30 17:59:37,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:37,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:59:37,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-30 17:59:37,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:59:38,166 INFO L130 PetriNetUnfolder]: 380/772 cut-off events. [2023-08-30 17:59:38,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:59:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3486 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-08-30 17:59:38,168 INFO L137 encePairwiseOnDemand]: 316/342 looper letters, 24 selfloop transitions, 2 changer transitions 19/48 dead transitions. [2023-08-30 17:59:38,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 185 flow [2023-08-30 17:59:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:59:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:59:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-30 17:59:38,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233918128654971 [2023-08-30 17:59:38,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-30 17:59:38,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-30 17:59:38,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:59:38,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-30 17:59:38,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:38,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:38,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:38,186 INFO L175 Difference]: Start difference. First operand has 46 places, 70 transitions, 145 flow. Second operand 3 states and 537 transitions. [2023-08-30 17:59:38,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 185 flow [2023-08-30 17:59:38,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 185 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:59:38,187 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 73 flow [2023-08-30 17:59:38,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-08-30 17:59:38,188 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-30 17:59:38,189 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 73 flow [2023-08-30 17:59:38,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:38,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:59:38,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 17:59:38,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 17:59:38,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:59:38,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:59:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 765939218, now seen corresponding path program 1 times [2023-08-30 17:59:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:59:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839489459] [2023-08-30 17:59:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:59:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:59:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:59:38,311 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 17:59:38,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:59:38,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839489459] [2023-08-30 17:59:38,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839489459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:59:38,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567197604] [2023-08-30 17:59:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:59:38,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:59:38,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:59:38,313 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 17:59:38,315 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 17:59:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:59:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:59:38,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:59:38,463 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 17:59:38,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:59:38,573 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 17:59:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567197604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:59:38,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:59:38,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:59:38,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355067325] [2023-08-30 17:59:38,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:59:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:59:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:59:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:59:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:59:38,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-30 17:59:38,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:38,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:59:38,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-30 17:59:38,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:59:39,022 INFO L130 PetriNetUnfolder]: 60/146 cut-off events. [2023-08-30 17:59:39,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:59:39,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 146 events. 60/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 399 event pairs, 51 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 287. Up to 133 conditions per place. [2023-08-30 17:59:39,023 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-30 17:59:39,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 143 flow [2023-08-30 17:59:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:59:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:59:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 968 transitions. [2023-08-30 17:59:39,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-08-30 17:59:39,026 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 968 transitions. [2023-08-30 17:59:39,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 968 transitions. [2023-08-30 17:59:39,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:59:39,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 968 transitions. [2023-08-30 17:59:39,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:39,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:39,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:39,031 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 73 flow. Second operand 6 states and 968 transitions. [2023-08-30 17:59:39,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 143 flow [2023-08-30 17:59:39,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:59:39,032 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-08-30 17:59:39,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-30 17:59:39,033 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2023-08-30 17:59:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-08-30 17:59:39,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:39,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:59:39,034 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-30 17:59:39,042 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 17:59:39,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:59:39,243 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:59:39,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:59:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1241147616, now seen corresponding path program 2 times [2023-08-30 17:59:39,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:59:39,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143929706] [2023-08-30 17:59:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:59:39,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:59:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:59:39,514 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 17:59:39,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:59:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143929706] [2023-08-30 17:59:39,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143929706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:59:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94914041] [2023-08-30 17:59:39,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 17:59:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:59:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:59:39,516 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 17:59:39,519 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 17:59:39,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 17:59:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:59:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:59:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:59:39,687 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 17:59:39,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:59:40,018 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 17:59:40,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94914041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:59:40,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:59:40,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:59:40,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475920107] [2023-08-30 17:59:40,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:59:40,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:59:40,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:59:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:59:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:59:40,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-30 17:59:40,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:40,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:59:40,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-30 17:59:40,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:59:41,121 INFO L130 PetriNetUnfolder]: 60/152 cut-off events. [2023-08-30 17:59:41,121 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 17:59:41,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 152 events. 60/152 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 397 event pairs, 51 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 278. Up to 133 conditions per place. [2023-08-30 17:59:41,122 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 24 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-08-30 17:59:41,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 211 flow [2023-08-30 17:59:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 17:59:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 17:59:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1913 transitions. [2023-08-30 17:59:41,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466130604288499 [2023-08-30 17:59:41,127 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1913 transitions. [2023-08-30 17:59:41,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1913 transitions. [2023-08-30 17:59:41,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:59:41,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1913 transitions. [2023-08-30 17:59:41,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:41,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:41,137 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:41,137 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 1913 transitions. [2023-08-30 17:59:41,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 211 flow [2023-08-30 17:59:41,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 197 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 17:59:41,139 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-08-30 17:59:41,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-30 17:59:41,139 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-30 17:59:41,139 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-08-30 17:59:41,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:59:41,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:59:41,140 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 17:59:41,150 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 17:59:41,345 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,SelfDestructingSolverStorable9 [2023-08-30 17:59:41,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:59:41,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:59:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1169032288, now seen corresponding path program 3 times [2023-08-30 17:59:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:59:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836908411] [2023-08-30 17:59:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:59:41,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:59:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:59:41,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:59:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:59:41,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:59:41,395 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:59:41,395 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:59:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 17:59:41,396 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-30 17:59:41,397 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:59:41,397 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:59:41,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:59:41,424 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:59:41,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-08-30 17:59:41,477 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-08-30 17:59:41,478 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:59:41,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-08-30 17:59:41,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 263 transitions, 544 flow [2023-08-30 17:59:41,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 263 transitions, 544 flow [2023-08-30 17:59:41,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:59:41,483 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 263 transitions, 544 flow [2023-08-30 17:59:41,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 263 transitions, 544 flow [2023-08-30 17:59:41,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-08-30 17:59:41,517 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-08-30 17:59:41,517 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:59:41,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-08-30 17:59:41,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 35052 [2023-08-30 18:00:03,497 INFO L134 LiptonReduction]: Checked pairs total: 59174 [2023-08-30 18:00:03,497 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-30 18:00:03,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:00:03,498 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;@5fd31077, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:00:03,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:00:03,500 INFO L130 PetriNetUnfolder]: 6/25 cut-off events. [2023-08-30 18:00:03,500 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:00:03,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:00:03,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:00:03,501 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 18:00:03,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:00:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1148075152, now seen corresponding path program 1 times [2023-08-30 18:00:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:00:03,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968289543] [2023-08-30 18:00:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:00:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:03,574 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 18:00:03,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:00:03,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968289543] [2023-08-30 18:00:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968289543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:00:03,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:00:03,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:00:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938979054] [2023-08-30 18:00:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:00:03,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:00:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:00:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:00:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:00:03,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 468 [2023-08-30 18:00:03,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 105 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:03,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:00:03,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 468 [2023-08-30 18:00:03,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:00:05,748 INFO L130 PetriNetUnfolder]: 12109/18691 cut-off events. [2023-08-30 18:00:05,748 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-30 18:00:05,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35981 conditions, 18691 events. 12109/18691 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 120076 event pairs, 10328 based on Foata normal form. 3243/18283 useless extension candidates. Maximal degree in co-relation 12239. Up to 17187 conditions per place. [2023-08-30 18:00:05,890 INFO L137 encePairwiseOnDemand]: 435/468 looper letters, 60 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-30 18:00:05,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 294 flow [2023-08-30 18:00:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:00:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:00:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-08-30 18:00:05,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2023-08-30 18:00:05,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-08-30 18:00:05,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-08-30 18:00:05,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:00:05,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-08-30 18:00:05,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:05,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 468.0) internal successors, (1872), 4 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:05,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 468.0) internal successors, (1872), 4 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:05,900 INFO L175 Difference]: Start difference. First operand has 71 places, 105 transitions, 228 flow. Second operand 3 states and 732 transitions. [2023-08-30 18:00:05,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 294 flow [2023-08-30 18:00:05,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:00:05,905 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 180 flow [2023-08-30 18:00:05,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-30 18:00:05,906 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-30 18:00:05,906 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 180 flow [2023-08-30 18:00:05,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:05,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:00:05,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:00:05,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 18:00:05,907 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 18:00:05,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:00:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1342599331, now seen corresponding path program 1 times [2023-08-30 18:00:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:00:05,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909179237] [2023-08-30 18:00:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:00:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:06,025 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 18:00:06,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:00:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909179237] [2023-08-30 18:00:06,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909179237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:00:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645045643] [2023-08-30 18:00:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:06,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:00:06,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:00:06,027 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 18:00:06,028 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 18:00:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 18:00:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:00:06,154 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 18:00:06,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:00:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645045643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:00:06,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:00:06,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 18:00:06,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624102247] [2023-08-30 18:00:06,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:00:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:00:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:00:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:00:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:00:06,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 468 [2023-08-30 18:00:06,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:06,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:00:06,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 468 [2023-08-30 18:00:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:00:07,825 INFO L130 PetriNetUnfolder]: 11900/18501 cut-off events. [2023-08-30 18:00:07,825 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-30 18:00:07,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35800 conditions, 18501 events. 11900/18501 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 120932 event pairs, 4928 based on Foata normal form. 0/14839 useless extension candidates. Maximal degree in co-relation 35787. Up to 17153 conditions per place. [2023-08-30 18:00:07,909 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 78 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 18:00:07,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 376 flow [2023-08-30 18:00:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:00:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:00:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-08-30 18:00:07,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121082621082621 [2023-08-30 18:00:07,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-08-30 18:00:07,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-08-30 18:00:07,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:00:07,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-08-30 18:00:07,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:07,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 468.0) internal successors, (1872), 4 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:07,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 468.0) internal successors, (1872), 4 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:07,915 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 180 flow. Second operand 3 states and 719 transitions. [2023-08-30 18:00:07,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 376 flow [2023-08-30 18:00:07,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 372 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:00:07,917 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 188 flow [2023-08-30 18:00:07,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-30 18:00:07,918 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-30 18:00:07,918 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 188 flow [2023-08-30 18:00:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:07,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:00:07,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:00:07,927 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 18:00:08,124 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 18:00:08,124 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 18:00:08,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:00:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1072851858, now seen corresponding path program 1 times [2023-08-30 18:00:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:00:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625221509] [2023-08-30 18:00:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:00:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:08,267 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 18:00:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:00:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625221509] [2023-08-30 18:00:08,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625221509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:00:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792919779] [2023-08-30 18:00:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:00:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:00:08,269 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 18:00:08,272 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 18:00:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:00:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:00:08,442 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 18:00:08,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:00:08,559 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 18:00:08,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792919779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:00:08,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:00:08,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:00:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086817265] [2023-08-30 18:00:08,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:00:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:00:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:00:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:00:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:00:08,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 468 [2023-08-30 18:00:08,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 214.14285714285714) internal successors, (1499), 7 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:08,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:00:08,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 468 [2023-08-30 18:00:08,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:00:10,674 INFO L130 PetriNetUnfolder]: 12152/18699 cut-off events. [2023-08-30 18:00:10,674 INFO L131 PetriNetUnfolder]: For 704/704 co-relation queries the response was YES. [2023-08-30 18:00:10,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36578 conditions, 18699 events. 12152/18699 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 119307 event pairs, 10328 based on Foata normal form. 3/15288 useless extension candidates. Maximal degree in co-relation 36550. Up to 17171 conditions per place. [2023-08-30 18:00:10,772 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 61 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-30 18:00:10,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 332 flow [2023-08-30 18:00:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:00:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:00:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1340 transitions. [2023-08-30 18:00:10,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772079772079772 [2023-08-30 18:00:10,775 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1340 transitions. [2023-08-30 18:00:10,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1340 transitions. [2023-08-30 18:00:10,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:00:10,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1340 transitions. [2023-08-30 18:00:10,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.33333333333334) internal successors, (1340), 6 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:10,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:10,781 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:10,781 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 188 flow. Second operand 6 states and 1340 transitions. [2023-08-30 18:00:10,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 332 flow [2023-08-30 18:00:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:00:10,784 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 222 flow [2023-08-30 18:00:10,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-30 18:00:10,785 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-08-30 18:00:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 222 flow [2023-08-30 18:00:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.14285714285714) internal successors, (1499), 7 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:00:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:00:10,793 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 18:00:10,991 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 18:00:10,992 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 18:00:10,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:00:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1705688097, now seen corresponding path program 2 times [2023-08-30 18:00:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:00:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658739669] [2023-08-30 18:00:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:00:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:11,347 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 18:00:11,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:00:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658739669] [2023-08-30 18:00:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658739669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:00:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995653326] [2023-08-30 18:00:11,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:00:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:00:11,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:00:11,349 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 18:00:11,350 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 18:00:11,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:00:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:00:11,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:00:11,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:00:11,465 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 18:00:11,753 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:00:11,753 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 18:00:11,891 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 18:00:12,228 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 18:00:12,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:00:12,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995653326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:00:12,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:00:12,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 18:00:12,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494750994] [2023-08-30 18:00:12,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:00:12,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:00:12,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:00:12,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:00:12,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:00:13,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 468 [2023-08-30 18:00:13,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:13,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:00:13,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 468 [2023-08-30 18:00:13,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:00:16,814 INFO L130 PetriNetUnfolder]: 16085/25502 cut-off events. [2023-08-30 18:00:16,814 INFO L131 PetriNetUnfolder]: For 1034/1034 co-relation queries the response was YES. [2023-08-30 18:00:16,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50009 conditions, 25502 events. 16085/25502 cut-off events. For 1034/1034 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 180587 event pairs, 2192 based on Foata normal form. 0/20776 useless extension candidates. Maximal degree in co-relation 49973. Up to 16963 conditions per place. [2023-08-30 18:00:16,976 INFO L137 encePairwiseOnDemand]: 460/468 looper letters, 168 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2023-08-30 18:00:16,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 196 transitions, 852 flow [2023-08-30 18:00:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:00:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:00:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-08-30 18:00:16,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946581196581197 [2023-08-30 18:00:16,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-08-30 18:00:16,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-08-30 18:00:16,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:00:16,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-08-30 18:00:16,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:16,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:16,985 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:16,985 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 222 flow. Second operand 6 states and 1389 transitions. [2023-08-30 18:00:16,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 196 transitions, 852 flow [2023-08-30 18:00:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 196 transitions, 838 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:00:16,989 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 295 flow [2023-08-30 18:00:16,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2023-08-30 18:00:16,989 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-08-30 18:00:16,990 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 295 flow [2023-08-30 18:00:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:16,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:00:16,990 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:00:17,000 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 18:00:17,200 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,SelfDestructingSolverStorable14 [2023-08-30 18:00:17,200 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 18:00:17,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:00:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1745022823, now seen corresponding path program 1 times [2023-08-30 18:00:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:00:17,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859174093] [2023-08-30 18:00:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:00:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:17,364 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 18:00:17,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:00:17,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859174093] [2023-08-30 18:00:17,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859174093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:00:17,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139609111] [2023-08-30 18:00:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:17,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:00:17,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:00:17,366 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 18:00:17,369 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 18:00:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:00:17,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:00:17,772 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 18:00:17,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:00:18,212 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 18:00:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139609111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:00:18,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:00:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-30 18:00:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369614012] [2023-08-30 18:00:18,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:00:18,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 18:00:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:00:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 18:00:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:00:18,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 468 [2023-08-30 18:00:18,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 295 flow. Second operand has 14 states, 14 states have (on average 210.92857142857142) internal successors, (2953), 14 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:18,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:00:18,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 468 [2023-08-30 18:00:18,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:00:21,791 INFO L130 PetriNetUnfolder]: 16228/25610 cut-off events. [2023-08-30 18:00:21,791 INFO L131 PetriNetUnfolder]: For 5101/5101 co-relation queries the response was YES. [2023-08-30 18:00:21,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55700 conditions, 25610 events. 16228/25610 cut-off events. For 5101/5101 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 182765 event pairs, 203 based on Foata normal form. 33/22407 useless extension candidates. Maximal degree in co-relation 55641. Up to 22706 conditions per place. [2023-08-30 18:00:21,947 INFO L137 encePairwiseOnDemand]: 463/468 looper letters, 127 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2023-08-30 18:00:21,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 769 flow [2023-08-30 18:00:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:00:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:00:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3056 transitions. [2023-08-30 18:00:21,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642246642246643 [2023-08-30 18:00:21,952 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3056 transitions. [2023-08-30 18:00:21,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3056 transitions. [2023-08-30 18:00:21,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:00:21,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3056 transitions. [2023-08-30 18:00:21,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 218.28571428571428) internal successors, (3056), 14 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:21,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 468.0) internal successors, (7020), 15 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:21,966 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 468.0) internal successors, (7020), 15 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:21,966 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 295 flow. Second operand 14 states and 3056 transitions. [2023-08-30 18:00:21,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 769 flow [2023-08-30 18:00:21,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 769 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:00:21,981 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 365 flow [2023-08-30 18:00:21,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=365, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2023-08-30 18:00:21,981 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2023-08-30 18:00:21,982 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 365 flow [2023-08-30 18:00:21,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 210.92857142857142) internal successors, (2953), 14 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:00:21,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:00:21,983 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:00:21,991 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 18:00:22,188 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,SelfDestructingSolverStorable15 [2023-08-30 18:00:22,188 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 18:00:22,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:00:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash -549860289, now seen corresponding path program 1 times [2023-08-30 18:00:22,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:00:22,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656850631] [2023-08-30 18:00:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:22,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:00:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:22,619 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 18:00:22,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:00:22,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656850631] [2023-08-30 18:00:22,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656850631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:00:22,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259088527] [2023-08-30 18:00:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:00:22,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:00:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:00:22,620 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 18:00:22,622 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 18:00:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:00:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 18:00:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:00:22,739 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 18:00:23,157 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:00:23,158 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 18:00:23,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:00:23,419 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 18:00:23,688 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 18:00:23,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:00:32,540 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 18:00:32,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259088527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:00:32,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:00:32,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 18:00:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606877373] [2023-08-30 18:00:32,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:00:32,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:00:32,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:00:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:00:32,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=92, Unknown=5, NotChecked=0, Total=132 [2023-08-30 18:00:34,628 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 18:00:36,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:00:38,969 WARN L539 Checker$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 18:00:41,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:00:43,105 WARN L539 Checker$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 18:00:45,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:00:47,219 WARN L539 Checker$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 18:00:49,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:00:51,269 WARN L539 Checker$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 18:00:53,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:00:55,464 WARN L539 Checker$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 18:00:57,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:00:59,624 WARN L539 Checker$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 18:01:01,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:01:03,789 WARN L539 Checker$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 18:01:05,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:01:08,083 WARN L539 Checker$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 18:01:10,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:01:12,234 WARN L539 Checker$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 18:01:14,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:01:16,341 WARN L539 Checker$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 18:01:18,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:01:20,607 WARN L539 Checker$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 18:01:22,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:01:24,745 WARN L539 Checker$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 18:01:24,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 468 [2023-08-30 18:01:24,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 365 flow. Second operand has 12 states, 12 states have (on average 176.91666666666666) internal successors, (2123), 12 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:24,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:01:24,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 468 [2023-08-30 18:01:24,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:01:30,687 INFO L130 PetriNetUnfolder]: 19924/30991 cut-off events. [2023-08-30 18:01:30,687 INFO L131 PetriNetUnfolder]: For 8472/8472 co-relation queries the response was YES. [2023-08-30 18:01:30,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68352 conditions, 30991 events. 19924/30991 cut-off events. For 8472/8472 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 217158 event pairs, 2587 based on Foata normal form. 0/27064 useless extension candidates. Maximal degree in co-relation 68279. Up to 17863 conditions per place. [2023-08-30 18:01:30,828 INFO L137 encePairwiseOnDemand]: 456/468 looper letters, 211 selfloop transitions, 27 changer transitions 0/251 dead transitions. [2023-08-30 18:01:30,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 251 transitions, 1260 flow [2023-08-30 18:01:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:01:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:01:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1436 transitions. [2023-08-30 18:01:30,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43833943833943834 [2023-08-30 18:01:30,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1436 transitions. [2023-08-30 18:01:30,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1436 transitions. [2023-08-30 18:01:30,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:01:30,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1436 transitions. [2023-08-30 18:01:30,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.14285714285714) internal successors, (1436), 7 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:30,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 468.0) internal successors, (3744), 8 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:30,837 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 468.0) internal successors, (3744), 8 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:30,837 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 365 flow. Second operand 7 states and 1436 transitions. [2023-08-30 18:01:30,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 251 transitions, 1260 flow [2023-08-30 18:01:30,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 251 transitions, 1183 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-30 18:01:30,863 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 479 flow [2023-08-30 18:01:30,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2023-08-30 18:01:30,864 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2023-08-30 18:01:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 479 flow [2023-08-30 18:01:30,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.91666666666666) internal successors, (2123), 12 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:30,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:01:30,865 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:01:30,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 18:01:31,073 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,SelfDestructingSolverStorable16 [2023-08-30 18:01:31,073 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:01:31,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:01:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash -790249823, now seen corresponding path program 1 times [2023-08-30 18:01:31,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:01:31,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691380862] [2023-08-30 18:01:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:31,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:01:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:31,268 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 18:01:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:01:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691380862] [2023-08-30 18:01:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691380862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:01:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623816563] [2023-08-30 18:01:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:31,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:01:31,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:01:31,273 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 18:01:31,277 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 18:01:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:31,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 18:01:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:01:31,502 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 18:01:31,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:01:31,711 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 18:01:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623816563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:01:31,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:01:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 18:01:31,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949333626] [2023-08-30 18:01:31,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:01:31,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:01:31,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:01:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:01:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:01:31,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 468 [2023-08-30 18:01:31,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 479 flow. Second operand has 9 states, 9 states have (on average 214.88888888888889) internal successors, (1934), 9 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:31,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:01:31,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 468 [2023-08-30 18:01:31,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:01:33,076 INFO L130 PetriNetUnfolder]: 2611/4625 cut-off events. [2023-08-30 18:01:33,076 INFO L131 PetriNetUnfolder]: For 3190/3190 co-relation queries the response was YES. [2023-08-30 18:01:33,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12837 conditions, 4625 events. 2611/4625 cut-off events. For 3190/3190 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 28817 event pairs, 121 based on Foata normal form. 477/4914 useless extension candidates. Maximal degree in co-relation 12348. Up to 2960 conditions per place. [2023-08-30 18:01:33,102 INFO L137 encePairwiseOnDemand]: 465/468 looper letters, 122 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2023-08-30 18:01:33,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 758 flow [2023-08-30 18:01:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:01:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:01:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1153 transitions. [2023-08-30 18:01:33,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49273504273504276 [2023-08-30 18:01:33,104 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1153 transitions. [2023-08-30 18:01:33,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1153 transitions. [2023-08-30 18:01:33,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:01:33,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1153 transitions. [2023-08-30 18:01:33,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 230.6) internal successors, (1153), 5 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:33,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 468.0) internal successors, (2808), 6 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:33,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 468.0) internal successors, (2808), 6 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:33,108 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 479 flow. Second operand 5 states and 1153 transitions. [2023-08-30 18:01:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 758 flow [2023-08-30 18:01:33,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 134 transitions, 720 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-30 18:01:33,118 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 253 flow [2023-08-30 18:01:33,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=5, PETRI_FLOW=253, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-08-30 18:01:33,119 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2023-08-30 18:01:33,119 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 253 flow [2023-08-30 18:01:33,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 214.88888888888889) internal successors, (1934), 9 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:33,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:01:33,120 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] [2023-08-30 18:01:33,129 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 18:01:33,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:01:33,326 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 18:01:33,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:01:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash -523981247, now seen corresponding path program 1 times [2023-08-30 18:01:33,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:01:33,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573209040] [2023-08-30 18:01:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:33,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:01:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:33,837 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 18:01:33,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:01:33,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573209040] [2023-08-30 18:01:33,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573209040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:01:33,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:01:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:01:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106305624] [2023-08-30 18:01:33,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:01:33,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:01:33,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:01:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:01:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:01:34,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 468 [2023-08-30 18:01:34,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:34,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:01:34,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 468 [2023-08-30 18:01:34,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:01:36,385 INFO L130 PetriNetUnfolder]: 3799/6450 cut-off events. [2023-08-30 18:01:36,385 INFO L131 PetriNetUnfolder]: For 5067/5067 co-relation queries the response was YES. [2023-08-30 18:01:36,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17050 conditions, 6450 events. 3799/6450 cut-off events. For 5067/5067 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 40786 event pairs, 1266 based on Foata normal form. 276/6417 useless extension candidates. Maximal degree in co-relation 7798. Up to 3375 conditions per place. [2023-08-30 18:01:36,407 INFO L137 encePairwiseOnDemand]: 452/468 looper letters, 99 selfloop transitions, 21 changer transitions 0/127 dead transitions. [2023-08-30 18:01:36,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 703 flow [2023-08-30 18:01:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:01:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:01:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-08-30 18:01:36,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2023-08-30 18:01:36,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-08-30 18:01:36,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-08-30 18:01:36,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:01:36,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-08-30 18:01:36,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:36,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 468.0) internal successors, (2808), 6 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:36,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 468.0) internal successors, (2808), 6 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:36,412 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 253 flow. Second operand 5 states and 1050 transitions. [2023-08-30 18:01:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 703 flow [2023-08-30 18:01:36,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 694 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:01:36,417 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 369 flow [2023-08-30 18:01:36,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2023-08-30 18:01:36,418 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2023-08-30 18:01:36,418 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 369 flow [2023-08-30 18:01:36,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:36,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:01:36,419 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] [2023-08-30 18:01:36,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 18:01:36,419 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 18:01:36,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:01:36,419 INFO L85 PathProgramCache]: Analyzing trace with hash -134903671, now seen corresponding path program 1 times [2023-08-30 18:01:36,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:01:36,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163811489] [2023-08-30 18:01:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:36,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:01:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:37,561 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 18:01:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:01:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163811489] [2023-08-30 18:01:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163811489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:01:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716918298] [2023-08-30 18:01:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:37,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:01:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:01:37,562 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 18:01:37,564 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 18:01:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 18:01:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:01:38,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:01:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:01:38,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:01:38,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716918298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:01:38,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:01:38,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 18:01:38,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982128530] [2023-08-30 18:01:38,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:01:38,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:01:38,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:01:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:01:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:01:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 468 [2023-08-30 18:01:39,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 369 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:39,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:01:39,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 468 [2023-08-30 18:01:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:01:41,486 INFO L130 PetriNetUnfolder]: 7173/12419 cut-off events. [2023-08-30 18:01:41,487 INFO L131 PetriNetUnfolder]: For 9890/9938 co-relation queries the response was YES. [2023-08-30 18:01:41,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37493 conditions, 12419 events. 7173/12419 cut-off events. For 9890/9938 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 92141 event pairs, 2819 based on Foata normal form. 143/11835 useless extension candidates. Maximal degree in co-relation 27670. Up to 5601 conditions per place. [2023-08-30 18:01:41,577 INFO L137 encePairwiseOnDemand]: 454/468 looper letters, 169 selfloop transitions, 18 changer transitions 0/196 dead transitions. [2023-08-30 18:01:41,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 196 transitions, 1273 flow [2023-08-30 18:01:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:01:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:01:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-08-30 18:01:41,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457977207977208 [2023-08-30 18:01:41,579 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-08-30 18:01:41,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-08-30 18:01:41,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:01:41,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-08-30 18:01:41,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:41,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:41,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:41,582 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 369 flow. Second operand 6 states and 1286 transitions. [2023-08-30 18:01:41,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 196 transitions, 1273 flow [2023-08-30 18:01:41,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 196 transitions, 1272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:01:41,590 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 542 flow [2023-08-30 18:01:41,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=542, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2023-08-30 18:01:41,591 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-08-30 18:01:41,591 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 542 flow [2023-08-30 18:01:41,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:41,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:01:41,591 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] [2023-08-30 18:01:41,596 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 18:01:41,791 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 18:01:41,792 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 18:01:41,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:01:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1885500053, now seen corresponding path program 2 times [2023-08-30 18:01:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:01:41,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276989946] [2023-08-30 18:01:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:41,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:01:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:43,658 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 18:01:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:01:43,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276989946] [2023-08-30 18:01:43,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276989946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:01:43,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573230828] [2023-08-30 18:01:43,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:01:43,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:01:43,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:01:43,660 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 18:01:43,662 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 18:01:43,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:01:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:01:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 18:01:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:01:44,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:01:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:01:44,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:01:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:01:45,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:01:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573230828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:01:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:01:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 18:01:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150224559] [2023-08-30 18:01:45,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:01:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:01:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:01:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:01:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:01:47,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 468 [2023-08-30 18:01:47,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:47,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:01:47,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 468 [2023-08-30 18:01:47,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:01:50,515 INFO L130 PetriNetUnfolder]: 11433/19993 cut-off events. [2023-08-30 18:01:50,516 INFO L131 PetriNetUnfolder]: For 23980/24088 co-relation queries the response was YES. [2023-08-30 18:01:50,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66132 conditions, 19993 events. 11433/19993 cut-off events. For 23980/24088 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 159561 event pairs, 5224 based on Foata normal form. 167/18925 useless extension candidates. Maximal degree in co-relation 31888. Up to 11644 conditions per place. [2023-08-30 18:01:50,648 INFO L137 encePairwiseOnDemand]: 460/468 looper letters, 197 selfloop transitions, 19 changer transitions 0/225 dead transitions. [2023-08-30 18:01:50,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 225 transitions, 1669 flow [2023-08-30 18:01:50,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:01:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:01:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-08-30 18:01:50,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457977207977208 [2023-08-30 18:01:50,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-08-30 18:01:50,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-08-30 18:01:50,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:01:50,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-08-30 18:01:50,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:50,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:50,655 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:50,655 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 542 flow. Second operand 6 states and 1286 transitions. [2023-08-30 18:01:50,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 225 transitions, 1669 flow [2023-08-30 18:01:50,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 225 transitions, 1659 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:01:50,671 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 728 flow [2023-08-30 18:01:50,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=728, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-30 18:01:50,671 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2023-08-30 18:01:50,671 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 728 flow [2023-08-30 18:01:50,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:50,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:01:50,672 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] [2023-08-30 18:01:50,677 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 18:01:50,872 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 18:01:50,873 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 18:01:50,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:01:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 903980159, now seen corresponding path program 1 times [2023-08-30 18:01:50,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:01:50,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905691944] [2023-08-30 18:01:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:50,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:01:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:52,254 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 18:01:52,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:01:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905691944] [2023-08-30 18:01:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905691944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:01:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277075647] [2023-08-30 18:01:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:52,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:01:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:01:52,257 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 18:01:52,260 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 18:01:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 18:01:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:01:53,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:01:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:01:53,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:01:53,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:01:53,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:01:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:01:53,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:01:53,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277075647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:01:53,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:01:53,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-08-30 18:01:53,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782730129] [2023-08-30 18:01:53,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:01:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:01:53,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:01:53,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:01:53,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:01:55,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 468 [2023-08-30 18:01:55,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 728 flow. Second operand has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:55,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:01:55,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 468 [2023-08-30 18:01:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:01:57,907 INFO L130 PetriNetUnfolder]: 11989/21006 cut-off events. [2023-08-30 18:01:57,907 INFO L131 PetriNetUnfolder]: For 32658/32826 co-relation queries the response was YES. [2023-08-30 18:01:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73174 conditions, 21006 events. 11989/21006 cut-off events. For 32658/32826 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 170655 event pairs, 5161 based on Foata normal form. 42/19771 useless extension candidates. Maximal degree in co-relation 48263. Up to 11097 conditions per place. [2023-08-30 18:01:58,081 INFO L137 encePairwiseOnDemand]: 461/468 looper letters, 203 selfloop transitions, 22 changer transitions 0/234 dead transitions. [2023-08-30 18:01:58,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 234 transitions, 1885 flow [2023-08-30 18:01:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:01:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:01:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-08-30 18:01:58,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457977207977208 [2023-08-30 18:01:58,084 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-08-30 18:01:58,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-08-30 18:01:58,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:01:58,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-08-30 18:01:58,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:58,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:58,089 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:58,089 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 728 flow. Second operand 6 states and 1286 transitions. [2023-08-30 18:01:58,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 234 transitions, 1885 flow [2023-08-30 18:01:58,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 234 transitions, 1884 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:01:58,110 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 874 flow [2023-08-30 18:01:58,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2023-08-30 18:01:58,110 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 29 predicate places. [2023-08-30 18:01:58,110 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 874 flow [2023-08-30 18:01:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:01:58,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:01:58,111 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] [2023-08-30 18:01:58,116 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 18:01:58,311 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 18:01:58,311 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 18:01:58,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:01:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1021980515, now seen corresponding path program 3 times [2023-08-30 18:01:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:01:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183255914] [2023-08-30 18:01:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:01:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:01:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:01:59,933 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 18:01:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:01:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183255914] [2023-08-30 18:01:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183255914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:01:59,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592184325] [2023-08-30 18:01:59,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:01:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:01:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:01:59,941 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 18:01:59,944 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 18:02:00,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:02:00,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:02:00,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 18:02:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:02:01,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:02:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:02:01,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:02:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:02:01,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:02:01,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592184325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:02:01,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:02:01,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 18:02:01,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624338582] [2023-08-30 18:02:01,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:02:01,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:02:01,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:02:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:02:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:02:03,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 468 [2023-08-30 18:02:03,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:03,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:02:03,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 468 [2023-08-30 18:02:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:02:06,590 INFO L130 PetriNetUnfolder]: 12057/21190 cut-off events. [2023-08-30 18:02:06,591 INFO L131 PetriNetUnfolder]: For 42038/42218 co-relation queries the response was YES. [2023-08-30 18:02:06,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75965 conditions, 21190 events. 12057/21190 cut-off events. For 42038/42218 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 171642 event pairs, 6171 based on Foata normal form. 107/19995 useless extension candidates. Maximal degree in co-relation 47669. Up to 12543 conditions per place. [2023-08-30 18:02:06,721 INFO L137 encePairwiseOnDemand]: 461/468 looper letters, 196 selfloop transitions, 19 changer transitions 0/224 dead transitions. [2023-08-30 18:02:06,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 224 transitions, 1892 flow [2023-08-30 18:02:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:02:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:02:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-30 18:02:06,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4569088319088319 [2023-08-30 18:02:06,724 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-30 18:02:06,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-30 18:02:06,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:02:06,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-30 18:02:06,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:06,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:06,728 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:06,728 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 874 flow. Second operand 6 states and 1283 transitions. [2023-08-30 18:02:06,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 224 transitions, 1892 flow [2023-08-30 18:02:06,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 1876 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 18:02:06,743 INFO L231 Difference]: Finished difference. Result has 106 places, 127 transitions, 1001 flow [2023-08-30 18:02:06,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1001, PETRI_PLACES=106, PETRI_TRANSITIONS=127} [2023-08-30 18:02:06,743 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 35 predicate places. [2023-08-30 18:02:06,743 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 127 transitions, 1001 flow [2023-08-30 18:02:06,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:06,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:02:06,744 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] [2023-08-30 18:02:06,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 18:02:06,944 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 18:02:06,944 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 18:02:06,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:02:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash 563907559, now seen corresponding path program 2 times [2023-08-30 18:02:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:02:06,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497943574] [2023-08-30 18:02:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:02:06,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:02:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:02:08,097 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 18:02:08,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:02:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497943574] [2023-08-30 18:02:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497943574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:02:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988942004] [2023-08-30 18:02:08,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:02:08,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:02:08,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:02:08,099 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 18:02:08,101 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 18:02:08,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:02:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:02:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 18:02:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:02:08,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:02:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:02:08,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:02:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988942004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:02:08,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:02:08,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 18:02:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932867409] [2023-08-30 18:02:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:02:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:02:08,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:02:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:02:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:02:09,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 468 [2023-08-30 18:02:09,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 127 transitions, 1001 flow. Second operand has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:09,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:02:09,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 468 [2023-08-30 18:02:09,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:02:12,832 INFO L130 PetriNetUnfolder]: 11761/20653 cut-off events. [2023-08-30 18:02:12,832 INFO L131 PetriNetUnfolder]: For 44621/44780 co-relation queries the response was YES. [2023-08-30 18:02:12,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75405 conditions, 20653 events. 11761/20653 cut-off events. For 44621/44780 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 168841 event pairs, 5169 based on Foata normal form. 69/19495 useless extension candidates. Maximal degree in co-relation 48591. Up to 11208 conditions per place. [2023-08-30 18:02:12,965 INFO L137 encePairwiseOnDemand]: 455/468 looper letters, 226 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2023-08-30 18:02:12,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 284 transitions, 2460 flow [2023-08-30 18:02:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:02:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:02:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1530 transitions. [2023-08-30 18:02:12,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2023-08-30 18:02:12,967 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1530 transitions. [2023-08-30 18:02:12,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1530 transitions. [2023-08-30 18:02:12,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:02:12,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1530 transitions. [2023-08-30 18:02:12,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 218.57142857142858) internal successors, (1530), 7 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:12,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 468.0) internal successors, (3744), 8 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:12,970 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 468.0) internal successors, (3744), 8 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:12,970 INFO L175 Difference]: Start difference. First operand has 106 places, 127 transitions, 1001 flow. Second operand 7 states and 1530 transitions. [2023-08-30 18:02:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 284 transitions, 2460 flow [2023-08-30 18:02:12,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 284 transitions, 2439 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 18:02:12,998 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1373 flow [2023-08-30 18:02:12,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1373, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2023-08-30 18:02:12,999 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2023-08-30 18:02:12,999 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1373 flow [2023-08-30 18:02:13,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:13,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:02:13,000 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] [2023-08-30 18:02:13,006 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 18:02:13,205 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 18:02:13,205 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:02:13,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:02:13,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2030775521, now seen corresponding path program 3 times [2023-08-30 18:02:13,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:02:13,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674614049] [2023-08-30 18:02:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:02:13,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:02:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:02:14,951 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 18:02:14,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:02:14,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674614049] [2023-08-30 18:02:14,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674614049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:02:14,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514530580] [2023-08-30 18:02:14,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:02:14,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:02:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:02:14,953 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 18:02:14,955 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 18:02:15,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:02:15,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:02:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 18:02:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:02:15,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:02:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:02:16,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:02:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:02:16,376 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 16 treesize of output 18 [2023-08-30 18:02:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:02:16,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:02:16,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514530580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:02:16,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:02:16,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-30 18:02:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167072767] [2023-08-30 18:02:16,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:02:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:02:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:02:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:02:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:02:17,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 468 [2023-08-30 18:02:17,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1373 flow. Second operand has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:17,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:02:17,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 468 [2023-08-30 18:02:17,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:02:20,579 INFO L130 PetriNetUnfolder]: 11137/19644 cut-off events. [2023-08-30 18:02:20,579 INFO L131 PetriNetUnfolder]: For 48436/48573 co-relation queries the response was YES. [2023-08-30 18:02:20,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72547 conditions, 19644 events. 11137/19644 cut-off events. For 48436/48573 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 158070 event pairs, 6535 based on Foata normal form. 40/18500 useless extension candidates. Maximal degree in co-relation 39853. Up to 11031 conditions per place. [2023-08-30 18:02:20,780 INFO L137 encePairwiseOnDemand]: 461/468 looper letters, 189 selfloop transitions, 17 changer transitions 0/215 dead transitions. [2023-08-30 18:02:20,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 215 transitions, 1987 flow [2023-08-30 18:02:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:02:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:02:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-30 18:02:20,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4569088319088319 [2023-08-30 18:02:20,782 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-30 18:02:20,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-30 18:02:20,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:02:20,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-30 18:02:20,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:20,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:20,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 468.0) internal successors, (3276), 7 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:20,787 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1373 flow. Second operand 6 states and 1283 transitions. [2023-08-30 18:02:20,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 215 transitions, 1987 flow [2023-08-30 18:02:20,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 215 transitions, 1910 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-30 18:02:20,840 INFO L231 Difference]: Finished difference. Result has 115 places, 130 transitions, 1100 flow [2023-08-30 18:02:20,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1100, PETRI_PLACES=115, PETRI_TRANSITIONS=130} [2023-08-30 18:02:20,841 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 44 predicate places. [2023-08-30 18:02:20,841 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 130 transitions, 1100 flow [2023-08-30 18:02:20,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:20,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:02:20,841 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] [2023-08-30 18:02:20,847 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 18:02:21,041 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 18:02:21,042 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 18:02:21,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:02:21,042 INFO L85 PathProgramCache]: Analyzing trace with hash -58103076, now seen corresponding path program 1 times [2023-08-30 18:02:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:02:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683700570] [2023-08-30 18:02:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:02:21,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:02:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:02:22,222 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 18:02:22,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:02:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683700570] [2023-08-30 18:02:22,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683700570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:02:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904452091] [2023-08-30 18:02:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:02:22,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:02:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:02:22,224 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 18:02:22,226 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 18:02:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:02:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 18:02:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:02:22,385 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 18:02:22,828 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:02:22,828 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 18:02:22,963 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 18:02:23,539 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 18 treesize of output 13 [2023-08-30 18:02:23,929 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 21 treesize of output 16 [2023-08-30 18:02:33,031 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 18:02:33,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:02:43,383 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67| Int)) (or (= (select (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) 28 |c_~#cache~0.offset|)))) is different from false [2023-08-30 18:02:45,473 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67| Int) (v_ArrVal_1258 Int)) (or (= 0 (select (select (store |c_#memory_int| |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.base| (store (select |c_#memory_int| |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.base|) |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset| v_ArrVal_1258)) |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67|)) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) 28 |c_~#cache~0.offset|)))) is different from false [2023-08-30 18:02:56,027 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67| Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_68| Int) (v_ArrVal_1255 (Array Int Int)) (v_ArrVal_1258 Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1255) |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_68| v_ArrVal_1258) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_67| (+ |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_68| 28)))) is different from false [2023-08-30 18:02:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2023-08-30 18:02:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904452091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:02:56,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:02:56,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-30 18:02:56,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503775400] [2023-08-30 18:02:56,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:02:56,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:02:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:02:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:02:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=247, Unknown=16, NotChecked=108, Total=462 [2023-08-30 18:02:57,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 468 [2023-08-30 18:02:57,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 130 transitions, 1100 flow. Second operand has 22 states, 22 states have (on average 170.36363636363637) internal successors, (3748), 22 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:02:57,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:02:57,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 468 [2023-08-30 18:02:57,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:02:59,288 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 18:03:01,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:03,366 WARN L539 Checker$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 18:03:11,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:13,562 WARN L539 Checker$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 18:03:15,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:17,611 WARN L539 Checker$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 18:03:19,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:25,806 WARN L539 Checker$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 18:03:27,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:29,826 WARN L539 Checker$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 18:03:31,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:33,863 WARN L539 Checker$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 18:03:35,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:37,923 WARN L539 Checker$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 18:03:39,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:41,942 WARN L539 Checker$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 18:03:43,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:45,982 WARN L539 Checker$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 18:03:47,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:50,003 WARN L539 Checker$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 18:03:52,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:03:54,049 WARN L539 Checker$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 18:04:00,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:04,459 WARN L539 Checker$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 18:04:06,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:08,531 WARN L539 Checker$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 18:04:10,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:12,828 WARN L539 Checker$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 18:04:15,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:17,403 WARN L539 Checker$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 18:04:19,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:23,678 WARN L539 Checker$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 18:04:25,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:30,198 WARN L539 Checker$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 18:04:32,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:34,359 WARN L539 Checker$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 18:04:36,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:04:38,575 WARN L539 Checker$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 18:04:40,937 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 18:04:45,936 INFO L130 PetriNetUnfolder]: 18503/32016 cut-off events. [2023-08-30 18:04:45,936 INFO L131 PetriNetUnfolder]: For 71367/71433 co-relation queries the response was YES. [2023-08-30 18:04:46,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118603 conditions, 32016 events. 18503/32016 cut-off events. For 71367/71433 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 270973 event pairs, 3365 based on Foata normal form. 156/30495 useless extension candidates. Maximal degree in co-relation 53418. Up to 15600 conditions per place. [2023-08-30 18:04:46,185 INFO L137 encePairwiseOnDemand]: 458/468 looper letters, 357 selfloop transitions, 48 changer transitions 0/413 dead transitions. [2023-08-30 18:04:46,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 413 transitions, 4186 flow [2023-08-30 18:04:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:04:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:04:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1877 transitions. [2023-08-30 18:04:46,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010683760683761 [2023-08-30 18:04:46,188 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1877 transitions. [2023-08-30 18:04:46,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1877 transitions. [2023-08-30 18:04:46,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:04:46,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1877 transitions. [2023-08-30 18:04:46,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 187.7) internal successors, (1877), 10 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:04:46,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 468.0) internal successors, (5148), 11 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:04:46,194 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 468.0) internal successors, (5148), 11 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:04:46,194 INFO L175 Difference]: Start difference. First operand has 115 places, 130 transitions, 1100 flow. Second operand 10 states and 1877 transitions. [2023-08-30 18:04:46,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 413 transitions, 4186 flow [2023-08-30 18:04:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 413 transitions, 4121 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:04:46,257 INFO L231 Difference]: Finished difference. Result has 127 places, 169 transitions, 1606 flow [2023-08-30 18:04:46,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1606, PETRI_PLACES=127, PETRI_TRANSITIONS=169} [2023-08-30 18:04:46,258 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2023-08-30 18:04:46,258 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 169 transitions, 1606 flow [2023-08-30 18:04:46,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.36363636363637) internal successors, (3748), 22 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:04:46,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:04:46,259 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:04:46,269 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 18:04:46,464 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 18:04:46,465 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 18:04:46,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:04:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2111283578, now seen corresponding path program 1 times [2023-08-30 18:04:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:04:46,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190248825] [2023-08-30 18:04:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:04:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:04:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:04:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:04:47,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:04:47,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190248825] [2023-08-30 18:04:47,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190248825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:04:47,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073701100] [2023-08-30 18:04:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:04:47,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:04:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:04:47,761 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 18:04:47,763 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 18:04:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:04:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 18:04:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:04:47,924 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 18:04:48,416 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:04:48,417 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 18:04:48,612 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 18:04:49,244 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 18 treesize of output 13 [2023-08-30 18:04:49,672 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 21 treesize of output 16 [2023-08-30 18:04:49,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:04:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:04:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:05:07,377 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| Int)) (or (= (select (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) 28 |c_~#cache~0.offset|)))) is different from false [2023-08-30 18:05:09,443 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| Int) (v_ArrVal_1360 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1360) |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) 28 |c_~#cache~0.offset|)))) is different from false [2023-08-30 18:05:11,513 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1358 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| Int) (v_ArrVal_1360 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.base| (store (select |c_#memory_int| |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.base|) |c_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset| v_ArrVal_1358)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1360) |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) 28 |c_~#cache~0.offset|)))) is different from false [2023-08-30 18:05:11,802 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_72| Int) (v_ArrVal_1358 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| Int) (v_ArrVal_1360 (Array Int Int))) (or (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| (+ |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_72| 28)) (= (select (select (store (store |c_#memory_int| |c_~#cache~0.base| (store (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_72| v_ArrVal_1358)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1360) |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71|) 0))) is different from false [2023-08-30 18:05:11,958 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array Int Int)) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_72| Int) (v_ArrVal_1358 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| Int) (v_ArrVal_1360 (Array Int Int))) (or (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71| (+ |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_72| 28)) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1355))) (store .cse0 |c_~#cache~0.base| (store (select .cse0 |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_72| v_ArrVal_1358))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1360) |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_71|) 0))) is different from false [2023-08-30 18:05:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 3 not checked. [2023-08-30 18:05:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073701100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:05:12,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:05:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-08-30 18:05:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314176065] [2023-08-30 18:05:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:05:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:05:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:05:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:05:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=231, Unknown=12, NotChecked=180, Total=506 [2023-08-30 18:05:12,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 468 [2023-08-30 18:05:12,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 169 transitions, 1606 flow. Second operand has 23 states, 23 states have (on average 170.52173913043478) internal successors, (3922), 23 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:05:12,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:05:12,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 468 [2023-08-30 18:05:12,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:05:14,920 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 18:05:16,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:19,009 WARN L539 Checker$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 18:05:25,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:29,284 WARN L539 Checker$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 18:05:31,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:33,322 WARN L539 Checker$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 18:05:39,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:41,526 WARN L539 Checker$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 18:05:43,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:45,546 WARN L539 Checker$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 18:05:47,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:49,584 WARN L539 Checker$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 18:05:51,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:53,676 WARN L539 Checker$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 18:05:55,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:05:57,695 WARN L539 Checker$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 18:05:59,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:01,735 WARN L539 Checker$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 18:06:03,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:05,757 WARN L539 Checker$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 18:06:07,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:09,818 WARN L539 Checker$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 18:06:20,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:22,405 WARN L539 Checker$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 18:06:24,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:26,486 WARN L539 Checker$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 18:06:28,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:30,752 WARN L539 Checker$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 18:06:33,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:35,255 WARN L539 Checker$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 18:06:37,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:41,540 WARN L539 Checker$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 18:06:43,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:48,212 WARN L539 Checker$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 18:06:50,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:52,378 WARN L539 Checker$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 18:06:54,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:06:56,563 WARN L539 Checker$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 18:06:58,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:07:05,240 INFO L130 PetriNetUnfolder]: 23328/40389 cut-off events. [2023-08-30 18:07:05,241 INFO L131 PetriNetUnfolder]: For 151971/152070 co-relation queries the response was YES. [2023-08-30 18:07:05,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171945 conditions, 40389 events. 23328/40389 cut-off events. For 151971/152070 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 349237 event pairs, 4279 based on Foata normal form. 180/38458 useless extension candidates. Maximal degree in co-relation 81339. Up to 14732 conditions per place. [2023-08-30 18:07:05,623 INFO L137 encePairwiseOnDemand]: 444/468 looper letters, 376 selfloop transitions, 89 changer transitions 0/473 dead transitions. [2023-08-30 18:07:05,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 473 transitions, 5083 flow [2023-08-30 18:07:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:07:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:07:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2023-08-30 18:07:05,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013209013209013 [2023-08-30 18:07:05,625 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2023-08-30 18:07:05,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2023-08-30 18:07:05,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:07:05,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2023-08-30 18:07:05,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:05,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 468.0) internal successors, (5616), 12 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:05,632 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 468.0) internal successors, (5616), 12 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:05,632 INFO L175 Difference]: Start difference. First operand has 127 places, 169 transitions, 1606 flow. Second operand 11 states and 2066 transitions. [2023-08-30 18:07:05,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 473 transitions, 5083 flow [2023-08-30 18:07:05,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 473 transitions, 5043 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 18:07:05,784 INFO L231 Difference]: Finished difference. Result has 140 places, 217 transitions, 2431 flow [2023-08-30 18:07:05,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2431, PETRI_PLACES=140, PETRI_TRANSITIONS=217} [2023-08-30 18:07:05,785 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 69 predicate places. [2023-08-30 18:07:05,785 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 217 transitions, 2431 flow [2023-08-30 18:07:05,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 170.52173913043478) internal successors, (3922), 23 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:05,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:07:05,785 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:07:05,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 18:07:05,986 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 18:07:05,986 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 18:07:05,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:07:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1266861319, now seen corresponding path program 1 times [2023-08-30 18:07:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:07:05,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165163601] [2023-08-30 18:07:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:07:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:07:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:07:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:07:06,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:07:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165163601] [2023-08-30 18:07:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165163601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:07:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602535698] [2023-08-30 18:07:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:07:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:07:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:07:06,975 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 18:07:06,979 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 18:07:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:07:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:07:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:07:07,141 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 18:07:07,551 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:07:07,551 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 18:07:07,679 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 18:07:07,833 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 18:07:08,370 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 24 treesize of output 17 [2023-08-30 18:07:08,755 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 18:07:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:07:09,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:07:15,757 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1457 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1457) |c_~#cache~0.base|))) is different from false [2023-08-30 18:07:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 1 not checked. [2023-08-30 18:07:16,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602535698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:07:16,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:07:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-30 18:07:16,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230862774] [2023-08-30 18:07:16,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:07:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:07:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:07:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:07:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=342, Unknown=2, NotChecked=38, Total=462 [2023-08-30 18:07:17,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 468 [2023-08-30 18:07:17,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 217 transitions, 2431 flow. Second operand has 22 states, 22 states have (on average 167.0909090909091) internal successors, (3676), 22 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:17,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:07:17,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 468 [2023-08-30 18:07:17,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:07:30,980 INFO L130 PetriNetUnfolder]: 26556/46317 cut-off events. [2023-08-30 18:07:30,980 INFO L131 PetriNetUnfolder]: For 233234/233358 co-relation queries the response was YES. [2023-08-30 18:07:31,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223613 conditions, 46317 events. 26556/46317 cut-off events. For 233234/233358 co-relation queries the response was YES. Maximal size of possible extension queue 1822. Compared 410605 event pairs, 5156 based on Foata normal form. 145/44045 useless extension candidates. Maximal degree in co-relation 190134. Up to 26387 conditions per place. [2023-08-30 18:07:31,506 INFO L137 encePairwiseOnDemand]: 453/468 looper letters, 484 selfloop transitions, 104 changer transitions 0/596 dead transitions. [2023-08-30 18:07:31,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 596 transitions, 7503 flow [2023-08-30 18:07:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:07:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:07:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2704 transitions. [2023-08-30 18:07:31,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2023-08-30 18:07:31,510 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2704 transitions. [2023-08-30 18:07:31,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2704 transitions. [2023-08-30 18:07:31,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:07:31,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2704 transitions. [2023-08-30 18:07:31,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.26666666666668) internal successors, (2704), 15 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:31,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 468.0) internal successors, (7488), 16 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:31,520 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 468.0) internal successors, (7488), 16 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:31,520 INFO L175 Difference]: Start difference. First operand has 140 places, 217 transitions, 2431 flow. Second operand 15 states and 2704 transitions. [2023-08-30 18:07:31,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 596 transitions, 7503 flow [2023-08-30 18:07:32,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 596 transitions, 7413 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-30 18:07:32,225 INFO L231 Difference]: Finished difference. Result has 158 places, 299 transitions, 3730 flow [2023-08-30 18:07:32,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3730, PETRI_PLACES=158, PETRI_TRANSITIONS=299} [2023-08-30 18:07:32,225 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 87 predicate places. [2023-08-30 18:07:32,225 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 299 transitions, 3730 flow [2023-08-30 18:07:32,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 167.0909090909091) internal successors, (3676), 22 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:32,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:07:32,226 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:07:32,232 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 18:07:32,426 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 18:07:32,427 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 18:07:32,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:07:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -37407129, now seen corresponding path program 1 times [2023-08-30 18:07:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:07:32,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044366888] [2023-08-30 18:07:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:07:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:07:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:07:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:07:34,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:07:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044366888] [2023-08-30 18:07:34,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044366888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:07:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481542633] [2023-08-30 18:07:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:07:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:07:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:07:34,010 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 18:07:34,012 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 18:07:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:07:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 18:07:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:07:34,176 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 18:07:34,658 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:07:34,658 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 18:07:34,843 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 18:07:35,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 18:07:36,809 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 18 treesize of output 13 [2023-08-30 18:07:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:07:37,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:07:40,113 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| Int) (v_ArrVal_1559 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| Int)) (or (= (select (store (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| v_ArrVal_1559) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75|) 0) (< (+ |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61|)))) is different from false [2023-08-30 18:07:42,152 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| Int) (v_ArrVal_1559 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| Int)) (or (= (select (store (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| v_ArrVal_1559) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61|)))) is different from false [2023-08-30 18:07:44,190 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| Int) (v_ArrVal_1559 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| Int)) (or (= (select (store (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| v_ArrVal_1559) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| 28)))) is different from false [2023-08-30 18:07:46,389 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| Int) (v_ArrVal_1559 Int)) (or (= (select (store (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| v_ArrVal_1559) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75|) 0) (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| 28)))) is different from false [2023-08-30 18:07:54,599 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1558 (Array Int Int)) (|v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| Int) (v_ArrVal_1559 Int) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| Int)) (or (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75| (+ |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| 28)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1558) |c_~#cache~0.base|) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_61| v_ArrVal_1559) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_75|) 0))) is different from false [2023-08-30 18:07:55,281 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 18:07:55,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481542633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:07:55,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:07:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2023-08-30 18:07:55,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542323823] [2023-08-30 18:07:55,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:07:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:07:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:07:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:07:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=454, Unknown=8, NotChecked=240, Total=812 [2023-08-30 18:07:55,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 468 [2023-08-30 18:07:55,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 299 transitions, 3730 flow. Second operand has 29 states, 29 states have (on average 160.51724137931035) internal successors, (4655), 29 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:07:55,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:07:55,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 468 [2023-08-30 18:07:55,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:08:00,259 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 18:08:08,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:12,771 WARN L539 Checker$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 18:08:14,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:16,970 WARN L539 Checker$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 18:08:19,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:21,131 WARN L539 Checker$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 18:08:23,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:25,289 WARN L539 Checker$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 18:08:27,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:29,368 WARN L539 Checker$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 18:08:31,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:46,378 WARN L539 Checker$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 18:08:48,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:51,029 WARN L539 Checker$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 18:08:53,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:08:55,760 WARN L539 Checker$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 18:08:57,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:09:00,415 WARN L539 Checker$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 18:09:03,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 18:09:05,143 WARN L539 Checker$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 18:09:08,546 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 18:09:18,751 INFO L130 PetriNetUnfolder]: 30352/52709 cut-off events. [2023-08-30 18:09:18,752 INFO L131 PetriNetUnfolder]: For 345168/345436 co-relation queries the response was YES. [2023-08-30 18:09:19,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276070 conditions, 52709 events. 30352/52709 cut-off events. For 345168/345436 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 470658 event pairs, 6354 based on Foata normal form. 105/49966 useless extension candidates. Maximal degree in co-relation 270627. Up to 32788 conditions per place. [2023-08-30 18:09:19,921 INFO L137 encePairwiseOnDemand]: 453/468 looper letters, 600 selfloop transitions, 143 changer transitions 0/751 dead transitions. [2023-08-30 18:09:19,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 751 transitions, 9845 flow [2023-08-30 18:09:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:09:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:09:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3507 transitions. [2023-08-30 18:09:19,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3746794871794872 [2023-08-30 18:09:19,924 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3507 transitions. [2023-08-30 18:09:19,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3507 transitions. [2023-08-30 18:09:19,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:09:19,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3507 transitions. [2023-08-30 18:09:19,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.35) internal successors, (3507), 20 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:09:19,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 468.0) internal successors, (9828), 21 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:09:19,936 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 468.0) internal successors, (9828), 21 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:09:19,936 INFO L175 Difference]: Start difference. First operand has 158 places, 299 transitions, 3730 flow. Second operand 20 states and 3507 transitions. [2023-08-30 18:09:19,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 751 transitions, 9845 flow [2023-08-30 18:09:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 751 transitions, 9506 flow, removed 142 selfloop flow, removed 3 redundant places. [2023-08-30 18:09:21,919 INFO L231 Difference]: Finished difference. Result has 186 places, 402 transitions, 5627 flow [2023-08-30 18:09:21,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5627, PETRI_PLACES=186, PETRI_TRANSITIONS=402} [2023-08-30 18:09:21,920 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 115 predicate places. [2023-08-30 18:09:21,920 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 402 transitions, 5627 flow [2023-08-30 18:09:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.51724137931035) internal successors, (4655), 29 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:09:21,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:09:21,921 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:09:21,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 18:09:22,125 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 18:09:22,125 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 18:09:22,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:09:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 488003301, now seen corresponding path program 1 times [2023-08-30 18:09:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:09:22,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890781900] [2023-08-30 18:09:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:09:22,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:09:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:09:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:09:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:09:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890781900] [2023-08-30 18:09:23,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890781900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:09:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651366763] [2023-08-30 18:09:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:09:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:09:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:09:23,825 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 18:09:23,826 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 18:09:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:09:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 18:09:23,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:09:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:09:26,535 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 18 [2023-08-30 18:09:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:09:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:09:30,423 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_78| Int) (v_ArrVal_1656 Int)) (or (< |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_78| (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) 28 |c_~#cache~0.offset|)) (= (select (store (select |c_#memory_int| |c_~#cache~0.base|) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_78| v_ArrVal_1656) |c_~#cache~0.offset|) 0))) is different from false [2023-08-30 18:09:30,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:09:30,501 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 19 treesize of output 23 [2023-08-30 18:09:30,538 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 6 treesize of output 4 [2023-08-30 18:09:30,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:09:30,605 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 28 treesize of output 32 [2023-08-30 18:09:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:09:31,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651366763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:09:31,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:09:31,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-30 18:09:31,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990786902] [2023-08-30 18:09:31,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:09:31,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 18:09:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:09:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 18:09:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=597, Unknown=1, NotChecked=50, Total=756 [2023-08-30 18:09:32,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 468 [2023-08-30 18:09:32,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 402 transitions, 5627 flow. Second operand has 28 states, 28 states have (on average 160.5) internal successors, (4494), 28 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:09:32,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:09:32,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 468 [2023-08-30 18:09:32,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:10:18,607 INFO L130 PetriNetUnfolder]: 42484/73260 cut-off events. [2023-08-30 18:10:18,607 INFO L131 PetriNetUnfolder]: For 570068/570485 co-relation queries the response was YES. [2023-08-30 18:10:19,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402161 conditions, 73260 events. 42484/73260 cut-off events. For 570068/570485 co-relation queries the response was YES. Maximal size of possible extension queue 2361. Compared 665592 event pairs, 7083 based on Foata normal form. 285/69694 useless extension candidates. Maximal degree in co-relation 393414. Up to 26458 conditions per place. [2023-08-30 18:10:19,725 INFO L137 encePairwiseOnDemand]: 451/468 looper letters, 1126 selfloop transitions, 472 changer transitions 3/1609 dead transitions. [2023-08-30 18:10:19,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1609 transitions, 21530 flow [2023-08-30 18:10:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-30 18:10:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-30 18:10:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 9464 transitions. [2023-08-30 18:10:19,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36767676767676766 [2023-08-30 18:10:19,734 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 9464 transitions. [2023-08-30 18:10:19,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 9464 transitions. [2023-08-30 18:10:19,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:10:19,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 9464 transitions. [2023-08-30 18:10:19,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 172.07272727272726) internal successors, (9464), 55 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:10:19,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 468.0) internal successors, (26208), 56 states have internal predecessors, (26208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:10:19,768 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 468.0) internal successors, (26208), 56 states have internal predecessors, (26208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:10:19,769 INFO L175 Difference]: Start difference. First operand has 186 places, 402 transitions, 5627 flow. Second operand 55 states and 9464 transitions. [2023-08-30 18:10:19,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1609 transitions, 21530 flow [2023-08-30 18:10:23,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1609 transitions, 20996 flow, removed 216 selfloop flow, removed 4 redundant places. [2023-08-30 18:10:23,513 INFO L231 Difference]: Finished difference. Result has 264 places, 766 transitions, 12232 flow [2023-08-30 18:10:23,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=468, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=12232, PETRI_PLACES=264, PETRI_TRANSITIONS=766} [2023-08-30 18:10:23,514 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 193 predicate places. [2023-08-30 18:10:23,515 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 766 transitions, 12232 flow [2023-08-30 18:10:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.5) internal successors, (4494), 28 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:10:23,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:10:23,516 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:10:23,525 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 18:10:23,725 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 18:10:23,726 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 18:10:23,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:10:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1872595673, now seen corresponding path program 2 times [2023-08-30 18:10:23,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:10:23,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642378540] [2023-08-30 18:10:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:10:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:10:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:10:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 18:10:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:10:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642378540] [2023-08-30 18:10:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642378540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:10:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548856808] [2023-08-30 18:10:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:10:25,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:10:25,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:10:25,171 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 18:10:25,173 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 18:10:25,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:10:25,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:10:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:10:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:10:25,366 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 18:10:25,843 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:10:25,843 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 18:10:26,021 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 18:10:26,179 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 18:10:26,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:10:26,930 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:10:26,931 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 19 treesize of output 11 [2023-08-30 18:10:27,343 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 18 treesize of output 13 [2023-08-30 18:10:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:10:27,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:10:28,199 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 15 treesize of output 13 [2023-08-30 18:10:28,223 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 12 treesize of output 8 [2023-08-30 18:10:40,722 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1753 (Array Int Int)) (|v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_80| Int) (|v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_64| Int) (v_ArrVal_1757 Int)) (or (= |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_64| |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_80|) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1753) |c_~#cache~0.base|) |v_t_funThread2of2ForFork0_cache_entry_addref_~entry#1.offset_64| v_ArrVal_1757) |v_t_funThread1of2ForFork0_cache_entry_addref_~entry#1.offset_80|) 0))) is different from false [2023-08-30 18:10:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 1 not checked. [2023-08-30 18:10:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548856808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:10:41,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:10:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 20 [2023-08-30 18:10:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118300707] [2023-08-30 18:10:41,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:10:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:10:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:10:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:10:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=340, Unknown=5, NotChecked=38, Total=462 [2023-08-30 18:10:42,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 468 [2023-08-30 18:10:42,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 766 transitions, 12232 flow. Second operand has 22 states, 22 states have (on average 141.3181818181818) internal successors, (3109), 22 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:10:42,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:10:42,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 468 [2023-08-30 18:10:42,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15