./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/pthread/stack_longest-2.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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:02:09,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:02:09,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:02:09,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:02:09,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:02:09,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:02:09,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:02:09,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:02:09,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:02:09,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:02:09,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:02:09,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:02:09,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:02:09,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:02:09,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:02:09,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:02:09,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:02:09,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:02:09,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:02:09,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:02:09,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:02:09,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:02:09,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:02:09,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:02:09,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:02:09,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:02:09,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:02:09,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:02:09,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:02:09,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:02:09,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:02:09,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:02:09,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:02:09,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:02:09,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:02:09,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:02:09,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:02:09,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:02:09,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:02:09,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:02:09,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:02:09,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:02:09,548 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:02:09,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:02:09,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:02:09,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:02:09,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:02:09,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:02:09,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:02:09,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:02:09,555 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:02:09,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:02:09,556 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:02:09,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:02:09,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:02:09,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:02:09,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:02:09,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:02:09,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:02:09,557 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:02:09,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:02:09,558 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:02:09,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:02:09,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:02:09,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:02:09,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:02:09,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:02:09,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:02:09,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:02:09,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:02:09,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:02:09,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:02:09,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:02:09,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:02:09,561 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:02:09,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:02:09,561 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:02:09,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:02:09,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:02:09,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:02:09,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:02:09,923 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:02:09,924 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:02:09,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-09-01 09:02:11,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:02:11,326 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:02:11,327 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-09-01 09:02:11,348 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6acd4ba/bf68591e215f41ab9506352178d55c71/FLAGb57a04963 [2023-09-01 09:02:11,361 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6acd4ba/bf68591e215f41ab9506352178d55c71 [2023-09-01 09:02:11,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:02:11,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:02:11,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:02:11,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:02:11,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:02:11,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:02:11" (1/1) ... [2023-09-01 09:02:11,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a84634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:11, skipping insertion in model container [2023-09-01 09:02:11,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:02:11" (1/1) ... [2023-09-01 09:02:11,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:02:11,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:02:11,860 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-09-01 09:02:11,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:02:11,936 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:02:11,975 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-09-01 09:02:12,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:02:12,061 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:02:12,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12 WrapperNode [2023-09-01 09:02:12,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:02:12,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:02:12,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:02:12,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:02:12,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,132 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-09-01 09:02:12,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:02:12,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:02:12,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:02:12,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:02:12,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:02:12,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:02:12,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:02:12,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:02:12,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (1/1) ... [2023-09-01 09:02:12,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:02:12,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:12,232 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) [2023-09-01 09:02:12,253 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 [2023-09-01 09:02:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 09:02:12,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 09:02:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 09:02:12,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 09:02:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:02:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:02:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:02:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:02:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 09:02:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:02:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:02:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:02:12,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:02:12,275 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:02:12,471 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:02:12,472 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:02:12,686 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:02:12,694 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:02:12,694 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 09:02:12,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:02:12 BoogieIcfgContainer [2023-09-01 09:02:12,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:02:12,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:02:12,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:02:12,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:02:12,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:02:11" (1/3) ... [2023-09-01 09:02:12,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c73b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:02:12, skipping insertion in model container [2023-09-01 09:02:12,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:12" (2/3) ... [2023-09-01 09:02:12,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c73b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:02:12, skipping insertion in model container [2023-09-01 09:02:12,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:02:12" (3/3) ... [2023-09-01 09:02:12,704 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-09-01 09:02:12,720 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:02:12,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:02:12,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 09:02:12,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:02:12,871 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 09:02:12,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 318 flow [2023-09-01 09:02:12,999 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2023-09-01 09:02:13,000 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:02:13,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 10/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 348 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-09-01 09:02:13,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 151 transitions, 318 flow [2023-09-01 09:02:13,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 140 transitions, 289 flow [2023-09-01 09:02:13,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:02:13,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 140 transitions, 289 flow [2023-09-01 09:02:13,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 140 transitions, 289 flow [2023-09-01 09:02:13,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 289 flow [2023-09-01 09:02:13,085 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-09-01 09:02:13,085 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 09:02:13,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 140 events. 10/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-09-01 09:02:13,090 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-09-01 09:02:16,366 INFO L134 LiptonReduction]: Checked pairs total: 8978 [2023-09-01 09:02:16,367 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-09-01 09:02:16,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:02:16,386 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;@6f12a5ab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:02:16,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-09-01 09:02:16,390 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2023-09-01 09:02:16,391 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 09:02:16,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:16,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 09:02:16,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:16,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash 920078475, now seen corresponding path program 1 times [2023-09-01 09:02:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:16,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433398634] [2023-09-01 09:02:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:16,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433398634] [2023-09-01 09:02:16,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433398634] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:16,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:16,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:02:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094118463] [2023-09-01 09:02:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:16,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:16,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:16,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 282 [2023-09-01 09:02:16,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:16,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:16,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 282 [2023-09-01 09:02:16,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:16,969 INFO L130 PetriNetUnfolder]: 539/918 cut-off events. [2023-09-01 09:02:16,970 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-09-01 09:02:16,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3466 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2023-09-01 09:02:16,981 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-09-01 09:02:16,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2023-09-01 09:02:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-09-01 09:02:17,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-09-01 09:02:17,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-09-01 09:02:17,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-09-01 09:02:17,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:17,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-09-01 09:02:17,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,022 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 450 transitions. [2023-09-01 09:02:17,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2023-09-01 09:02:17,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 09:02:17,029 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-09-01 09:02:17,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-09-01 09:02:17,034 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-09-01 09:02:17,034 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-09-01 09:02:17,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:17,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:17,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:02:17,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:17,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:17,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1451273937, now seen corresponding path program 1 times [2023-09-01 09:02:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141058825] [2023-09-01 09:02:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:17,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:17,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141058825] [2023-09-01 09:02:17,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141058825] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:17,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:17,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:02:17,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289378200] [2023-09-01 09:02:17,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:17,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:17,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:17,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 282 [2023-09-01 09:02:17,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:17,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 282 [2023-09-01 09:02:17,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:17,318 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-09-01 09:02:17,318 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-09-01 09:02:17,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4441 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2023-09-01 09:02:17,324 INFO L137 encePairwiseOnDemand]: 279/282 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-09-01 09:02:17,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-09-01 09:02:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-09-01 09:02:17,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2023-09-01 09:02:17,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-09-01 09:02:17,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-09-01 09:02:17,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:17,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-09-01 09:02:17,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,331 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 456 transitions. [2023-09-01 09:02:17,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-09-01 09:02:17,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:17,333 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-09-01 09:02:17,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-09-01 09:02:17,334 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-09-01 09:02:17,334 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-09-01 09:02:17,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:17,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:02:17,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:17,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:17,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1760034202, now seen corresponding path program 1 times [2023-09-01 09:02:17,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:17,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116309795] [2023-09-01 09:02:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:17,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:17,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116309795] [2023-09-01 09:02:17,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116309795] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:17,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786480674] [2023-09-01 09:02:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:17,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:17,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:17,449 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) [2023-09-01 09:02:17,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 09:02:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 09:02:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:17,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786480674] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:17,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:17,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-09-01 09:02:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730212417] [2023-09-01 09:02:17,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:17,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 09:02:17,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 09:02:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 09:02:17,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 282 [2023-09-01 09:02:17,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:17,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:17,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 282 [2023-09-01 09:02:17,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:18,256 INFO L130 PetriNetUnfolder]: 1619/2654 cut-off events. [2023-09-01 09:02:18,257 INFO L131 PetriNetUnfolder]: For 839/839 co-relation queries the response was YES. [2023-09-01 09:02:18,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12088 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2023-09-01 09:02:18,271 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-09-01 09:02:18,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-09-01 09:02:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 09:02:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 09:02:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1735 transitions. [2023-09-01 09:02:18,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127068557919622 [2023-09-01 09:02:18,277 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1735 transitions. [2023-09-01 09:02:18,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1735 transitions. [2023-09-01 09:02:18,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:18,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1735 transitions. [2023-09-01 09:02:18,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.58333333333334) internal successors, (1735), 12 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,289 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,289 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1735 transitions. [2023-09-01 09:02:18,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-09-01 09:02:18,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:18,299 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-09-01 09:02:18,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-09-01 09:02:18,301 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-09-01 09:02:18,301 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-09-01 09:02:18,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:18,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:18,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 09:02:18,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:18,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:18,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1018121817, now seen corresponding path program 1 times [2023-09-01 09:02:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:18,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793323776] [2023-09-01 09:02:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:18,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793323776] [2023-09-01 09:02:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793323776] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:02:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844920458] [2023-09-01 09:02:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:18,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 282 [2023-09-01 09:02:18,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:18,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 282 [2023-09-01 09:02:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:18,762 INFO L130 PetriNetUnfolder]: 512/977 cut-off events. [2023-09-01 09:02:18,762 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-09-01 09:02:18,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4170 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2023-09-01 09:02:18,768 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-09-01 09:02:18,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-09-01 09:02:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-09-01 09:02:18,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236406619385343 [2023-09-01 09:02:18,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-09-01 09:02:18,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-09-01 09:02:18,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:18,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-09-01 09:02:18,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,774 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 443 transitions. [2023-09-01 09:02:18,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-09-01 09:02:18,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 09:02:18,779 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-09-01 09:02:18,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-09-01 09:02:18,780 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-09-01 09:02:18,781 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-09-01 09:02:18,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:18,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:18,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:02:18,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:18,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1945408692, now seen corresponding path program 1 times [2023-09-01 09:02:18,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:18,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483274667] [2023-09-01 09:02:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:18,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:18,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:18,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483274667] [2023-09-01 09:02:18,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483274667] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:18,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:18,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:02:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264101396] [2023-09-01 09:02:18,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:18,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:02:18,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:18,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:02:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:02:18,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 282 [2023-09-01 09:02:18,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:18,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:18,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 282 [2023-09-01 09:02:18,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:18,996 INFO L130 PetriNetUnfolder]: 575/1096 cut-off events. [2023-09-01 09:02:18,996 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-09-01 09:02:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4650 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2023-09-01 09:02:19,002 INFO L137 encePairwiseOnDemand]: 276/282 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-09-01 09:02:19,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2023-09-01 09:02:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:02:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:02:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-09-01 09:02:19,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2023-09-01 09:02:19,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-09-01 09:02:19,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-09-01 09:02:19,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:19,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-09-01 09:02:19,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:19,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:19,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:19,008 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 448 transitions. [2023-09-01 09:02:19,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2023-09-01 09:02:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:19,012 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-09-01 09:02:19,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-09-01 09:02:19,013 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-09-01 09:02:19,013 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-09-01 09:02:19,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:19,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:19,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:19,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:02:19,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:19,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 498757517, now seen corresponding path program 1 times [2023-09-01 09:02:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:19,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24472664] [2023-09-01 09:02:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24472664] [2023-09-01 09:02:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24472664] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:19,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:19,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 09:02:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774956524] [2023-09-01 09:02:19,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 09:02:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 09:02:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 09:02:20,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2023-09-01 09:02:20,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:20,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:20,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2023-09-01 09:02:20,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:20,675 INFO L130 PetriNetUnfolder]: 844/1612 cut-off events. [2023-09-01 09:02:20,676 INFO L131 PetriNetUnfolder]: For 1177/1177 co-relation queries the response was YES. [2023-09-01 09:02:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1612 events. 844/1612 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7869 event pairs, 249 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 2456. Up to 886 conditions per place. [2023-09-01 09:02:20,685 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2023-09-01 09:02:20,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2023-09-01 09:02:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 09:02:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 09:02:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1172 transitions. [2023-09-01 09:02:20,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46178092986603625 [2023-09-01 09:02:20,703 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1172 transitions. [2023-09-01 09:02:20,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1172 transitions. [2023-09-01 09:02:20,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:20,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1172 transitions. [2023-09-01 09:02:20,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.22222222222223) internal successors, (1172), 9 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:20,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:20,711 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:20,711 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1172 transitions. [2023-09-01 09:02:20,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2023-09-01 09:02:20,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-09-01 09:02:20,717 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2023-09-01 09:02:20,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-09-01 09:02:20,718 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-09-01 09:02:20,718 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2023-09-01 09:02:20,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:20,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:20,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:02:20,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:20,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 858373001, now seen corresponding path program 2 times [2023-09-01 09:02:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:20,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158005289] [2023-09-01 09:02:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158005289] [2023-09-01 09:02:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158005289] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:21,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:21,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 09:02:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492395622] [2023-09-01 09:02:21,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:21,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 09:02:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 09:02:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-09-01 09:02:21,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2023-09-01 09:02:21,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:21,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:21,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2023-09-01 09:02:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:22,543 INFO L130 PetriNetUnfolder]: 1096/2088 cut-off events. [2023-09-01 09:02:22,544 INFO L131 PetriNetUnfolder]: For 1260/1260 co-relation queries the response was YES. [2023-09-01 09:02:22,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 2088 events. 1096/2088 cut-off events. For 1260/1260 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10771 event pairs, 301 based on Foata normal form. 0/2061 useless extension candidates. Maximal degree in co-relation 3995. Up to 839 conditions per place. [2023-09-01 09:02:22,555 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2023-09-01 09:02:22,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2023-09-01 09:02:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 09:02:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 09:02:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1172 transitions. [2023-09-01 09:02:22,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46178092986603625 [2023-09-01 09:02:22,560 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1172 transitions. [2023-09-01 09:02:22,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1172 transitions. [2023-09-01 09:02:22,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:22,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1172 transitions. [2023-09-01 09:02:22,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.22222222222223) internal successors, (1172), 9 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:22,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:22,567 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:22,567 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1172 transitions. [2023-09-01 09:02:22,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2023-09-01 09:02:22,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:02:22,576 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2023-09-01 09:02:22,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-09-01 09:02:22,577 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-09-01 09:02:22,577 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2023-09-01 09:02:22,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:22,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:22,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:22,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:02:22,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:22,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2064601814, now seen corresponding path program 1 times [2023-09-01 09:02:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:22,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415022764] [2023-09-01 09:02:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:22,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:22,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415022764] [2023-09-01 09:02:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415022764] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923996408] [2023-09-01 09:02:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:22,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:22,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:22,683 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) [2023-09-01 09:02:22,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 09:02:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 09:02:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 09:02:22,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 09:02:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923996408] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:22,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 09:02:22,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-09-01 09:02:22,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278678350] [2023-09-01 09:02:22,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 09:02:22,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 09:02:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 09:02:22,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-09-01 09:02:22,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 130.83333333333334) internal successors, (785), 6 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:22,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:22,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-09-01 09:02:22,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:23,174 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2023-09-01 09:02:23,174 INFO L131 PetriNetUnfolder]: For 1999/1999 co-relation queries the response was YES. [2023-09-01 09:02:23,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10876 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2023-09-01 09:02:23,186 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-09-01 09:02:23,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2023-09-01 09:02:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 09:02:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 09:02:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2023-09-01 09:02:23,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-09-01 09:02:23,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2023-09-01 09:02:23,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2023-09-01 09:02:23,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:23,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2023-09-01 09:02:23,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:23,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:23,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:23,197 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 846 transitions. [2023-09-01 09:02:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2023-09-01 09:02:23,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-09-01 09:02:23,207 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2023-09-01 09:02:23,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-09-01 09:02:23,209 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-09-01 09:02:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2023-09-01 09:02:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.83333333333334) internal successors, (785), 6 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:23,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:23,210 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:02:23,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 09:02:23,416 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,SelfDestructingSolverStorable7 [2023-09-01 09:02:23,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:23,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431302, now seen corresponding path program 2 times [2023-09-01 09:02:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:23,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633820037] [2023-09-01 09:02:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:23,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:23,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:23,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633820037] [2023-09-01 09:02:23,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633820037] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:23,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908222256] [2023-09-01 09:02:23,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 09:02:23,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:23,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:23,668 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) [2023-09-01 09:02:23,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 09:02:23,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 09:02:23,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:02:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 09:02:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:23,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908222256] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:23,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:23,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-09-01 09:02:23,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050416327] [2023-09-01 09:02:23,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:23,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 09:02:23,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 09:02:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-09-01 09:02:24,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 282 [2023-09-01 09:02:24,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 129.3) internal successors, (2586), 20 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:24,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:24,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 282 [2023-09-01 09:02:24,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:24,696 INFO L130 PetriNetUnfolder]: 1638/3035 cut-off events. [2023-09-01 09:02:24,696 INFO L131 PetriNetUnfolder]: For 3963/3963 co-relation queries the response was YES. [2023-09-01 09:02:24,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3035 events. 1638/3035 cut-off events. For 3963/3963 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 14014 event pairs, 352 based on Foata normal form. 32/3047 useless extension candidates. Maximal degree in co-relation 7670. Up to 936 conditions per place. [2023-09-01 09:02:24,715 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2023-09-01 09:02:24,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2023-09-01 09:02:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 09:02:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 09:02:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2886 transitions. [2023-09-01 09:02:24,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48733535967578523 [2023-09-01 09:02:24,723 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2886 transitions. [2023-09-01 09:02:24,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2886 transitions. [2023-09-01 09:02:24,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:24,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2886 transitions. [2023-09-01 09:02:24,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:24,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:24,739 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:24,739 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 2886 transitions. [2023-09-01 09:02:24,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2023-09-01 09:02:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 09:02:24,754 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2023-09-01 09:02:24,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-09-01 09:02:24,755 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-09-01 09:02:24,755 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2023-09-01 09:02:24,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.3) internal successors, (2586), 20 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:24,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:24,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:24,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 09:02:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:24,962 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:24,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash 878136134, now seen corresponding path program 3 times [2023-09-01 09:02:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292168925] [2023-09-01 09:02:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:25,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:25,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292168925] [2023-09-01 09:02:25,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292168925] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:25,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:25,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-09-01 09:02:25,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844029325] [2023-09-01 09:02:25,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:25,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 09:02:25,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:25,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 09:02:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-09-01 09:02:26,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 282 [2023-09-01 09:02:26,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:26,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:26,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 282 [2023-09-01 09:02:26,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:28,368 INFO L130 PetriNetUnfolder]: 2655/4959 cut-off events. [2023-09-01 09:02:28,369 INFO L131 PetriNetUnfolder]: For 9426/9426 co-relation queries the response was YES. [2023-09-01 09:02:28,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16702 conditions, 4959 events. 2655/4959 cut-off events. For 9426/9426 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26220 event pairs, 726 based on Foata normal form. 0/4932 useless extension candidates. Maximal degree in co-relation 15140. Up to 1528 conditions per place. [2023-09-01 09:02:28,412 INFO L137 encePairwiseOnDemand]: 264/282 looper letters, 140 selfloop transitions, 131 changer transitions 4/285 dead transitions. [2023-09-01 09:02:28,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 285 transitions, 2535 flow [2023-09-01 09:02:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 09:02:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 09:02:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3156 transitions. [2023-09-01 09:02:28,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144996059889677 [2023-09-01 09:02:28,421 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3156 transitions. [2023-09-01 09:02:28,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3156 transitions. [2023-09-01 09:02:28,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:28,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3156 transitions. [2023-09-01 09:02:28,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 116.88888888888889) internal successors, (3156), 27 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:28,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:28,454 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:28,460 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 3156 transitions. [2023-09-01 09:02:28,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 285 transitions, 2535 flow [2023-09-01 09:02:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 285 transitions, 2320 flow, removed 78 selfloop flow, removed 8 redundant places. [2023-09-01 09:02:28,513 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2023-09-01 09:02:28,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1927, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2023-09-01 09:02:28,515 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-09-01 09:02:28,515 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2023-09-01 09:02:28,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:28,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:28,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:28,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:02:28,521 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:28,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -7541718, now seen corresponding path program 4 times [2023-09-01 09:02:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:28,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751330285] [2023-09-01 09:02:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:29,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:29,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751330285] [2023-09-01 09:02:29,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751330285] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:29,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118852142] [2023-09-01 09:02:29,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 09:02:29,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:29,340 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) [2023-09-01 09:02:29,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 09:02:29,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 09:02:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:02:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2023-09-01 09:02:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:29,509 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-09-01 09:02:29,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-09-01 09:02:29,901 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 15 treesize of output 11 [2023-09-01 09:02:29,992 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 40 treesize of output 36 [2023-09-01 09:02:30,562 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 75 treesize of output 43 [2023-09-01 09:02:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:30,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:31,022 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_360 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_360) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-09-01 09:02:31,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 09:02:31,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-09-01 09:02:31,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 09:02:31,070 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 49 treesize of output 52 [2023-09-01 09:02:31,076 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 28 treesize of output 22 [2023-09-01 09:02:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118852142] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:31,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:31,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2023-09-01 09:02:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166962318] [2023-09-01 09:02:31,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 09:02:31,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 09:02:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1820, Unknown=1, NotChecked=86, Total=2070 [2023-09-01 09:02:31,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-09-01 09:02:31,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1927 flow. Second operand has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:31,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:31,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-09-01 09:02:31,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:39,485 INFO L130 PetriNetUnfolder]: 3584/6680 cut-off events. [2023-09-01 09:02:39,485 INFO L131 PetriNetUnfolder]: For 17054/17054 co-relation queries the response was YES. [2023-09-01 09:02:39,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24776 conditions, 6680 events. 3584/6680 cut-off events. For 17054/17054 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 38065 event pairs, 544 based on Foata normal form. 54/6697 useless extension candidates. Maximal degree in co-relation 20420. Up to 1562 conditions per place. [2023-09-01 09:02:39,603 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 274 selfloop transitions, 299 changer transitions 15/588 dead transitions. [2023-09-01 09:02:39,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 588 transitions, 5201 flow [2023-09-01 09:02:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-09-01 09:02:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-09-01 09:02:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6173 transitions. [2023-09-01 09:02:39,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321912807676262 [2023-09-01 09:02:39,626 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6173 transitions. [2023-09-01 09:02:39,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6173 transitions. [2023-09-01 09:02:39,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:39,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6173 transitions. [2023-09-01 09:02:39,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 90.77941176470588) internal successors, (6173), 68 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:39,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:39,672 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:39,672 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 68 states and 6173 transitions. [2023-09-01 09:02:39,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 588 transitions, 5201 flow [2023-09-01 09:02:39,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 588 transitions, 4980 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-09-01 09:02:39,778 INFO L231 Difference]: Finished difference. Result has 214 places, 345 transitions, 3990 flow [2023-09-01 09:02:39,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3990, PETRI_PLACES=214, PETRI_TRANSITIONS=345} [2023-09-01 09:02:39,779 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 180 predicate places. [2023-09-01 09:02:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 345 transitions, 3990 flow [2023-09-01 09:02:39,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:39,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:39,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:39,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 09:02:39,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:39,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:39,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash 366211873, now seen corresponding path program 1 times [2023-09-01 09:02:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:39,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400165115] [2023-09-01 09:02:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:41,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400165115] [2023-09-01 09:02:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400165115] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202498244] [2023-09-01 09:02:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:41,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:41,337 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) [2023-09-01 09:02:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 09:02:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 09:02:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:41,694 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 19 treesize of output 15 [2023-09-01 09:02:42,079 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 69 treesize of output 41 [2023-09-01 09:02:45,210 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-09-01 09:02:45,211 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 111 treesize of output 46 [2023-09-01 09:02:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:45,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:46,755 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 57 treesize of output 48 [2023-09-01 09:02:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202498244] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:47,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:47,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 64 [2023-09-01 09:02:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757182653] [2023-09-01 09:02:47,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:47,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-09-01 09:02:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-09-01 09:02:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3924, Unknown=1, NotChecked=0, Total=4290 [2023-09-01 09:02:48,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:51,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:53,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:55,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:57,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:02:59,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:02,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:04,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:06,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:08,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:10,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:12,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:14,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:16,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:18,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:03:18,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-09-01 09:03:18,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 345 transitions, 3990 flow. Second operand has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:18,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:18,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-09-01 09:03:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:59,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:04:22,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:04:24,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 09:04:30,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:32,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:47,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:49,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:51,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:04:53,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:05:08,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:05:11,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:05:14,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:05:17,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:05:18,844 INFO L130 PetriNetUnfolder]: 6618/12412 cut-off events. [2023-09-01 09:05:18,844 INFO L131 PetriNetUnfolder]: For 132000/132000 co-relation queries the response was YES. [2023-09-01 09:05:18,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76861 conditions, 12412 events. 6618/12412 cut-off events. For 132000/132000 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 80465 event pairs, 1368 based on Foata normal form. 68/12421 useless extension candidates. Maximal degree in co-relation 65145. Up to 4620 conditions per place. [2023-09-01 09:05:18,943 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 716 selfloop transitions, 448 changer transitions 214/1378 dead transitions. [2023-09-01 09:05:18,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1378 transitions, 16893 flow [2023-09-01 09:05:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-09-01 09:05:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-09-01 09:05:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 15306 transitions. [2023-09-01 09:05:18,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350407144733386 [2023-09-01 09:05:18,995 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 15306 transitions. [2023-09-01 09:05:18,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 15306 transitions. [2023-09-01 09:05:19,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:05:19,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 15306 transitions. [2023-09-01 09:05:19,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 94.48148148148148) internal successors, (15306), 162 states have internal predecessors, (15306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:05:19,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:05:19,087 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:05:19,087 INFO L175 Difference]: Start difference. First operand has 214 places, 345 transitions, 3990 flow. Second operand 162 states and 15306 transitions. [2023-09-01 09:05:19,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1378 transitions, 16893 flow [2023-09-01 09:05:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1378 transitions, 15907 flow, removed 369 selfloop flow, removed 12 redundant places. [2023-09-01 09:05:19,452 INFO L231 Difference]: Finished difference. Result has 389 places, 702 transitions, 8405 flow [2023-09-01 09:05:19,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=8405, PETRI_PLACES=389, PETRI_TRANSITIONS=702} [2023-09-01 09:05:19,453 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 355 predicate places. [2023-09-01 09:05:19,453 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 702 transitions, 8405 flow [2023-09-01 09:05:19,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:05:19,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:19,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:19,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 09:05:19,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 09:05:19,662 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:05:19,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash -765198685, now seen corresponding path program 2 times [2023-09-01 09:05:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:19,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833526978] [2023-09-01 09:05:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:05:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:05:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:05:20,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833526978] [2023-09-01 09:05:20,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833526978] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:05:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037856] [2023-09-01 09:05:20,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 09:05:20,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:05:20,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:05:20,834 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) [2023-09-01 09:05:20,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 09:05:21,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 09:05:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:05:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 95 conjunts are in the unsatisfiable core [2023-09-01 09:05:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:05:21,161 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 09:05:21,162 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 15 treesize of output 15 [2023-09-01 09:05:21,338 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 [2023-09-01 09:05:21,387 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 21 [2023-09-01 09:05:21,760 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-09-01 09:05:21,760 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 1 case distinctions, treesize of input 34 treesize of output 37 [2023-09-01 09:05:22,327 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 56 treesize of output 32 [2023-09-01 09:05:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:05:22,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:05:23,123 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_497 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_497) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-09-01 09:05:23,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 09:05:23,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-09-01 09:05:23,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 09:05:23,146 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 49 treesize of output 52 [2023-09-01 09:05:23,150 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 28 treesize of output 22 [2023-09-01 09:05:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:05:23,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037856] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:05:23,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:05:23,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 57 [2023-09-01 09:05:23,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012913879] [2023-09-01 09:05:23,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:05:23,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-09-01 09:05:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:05:23,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-09-01 09:05:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3106, Unknown=1, NotChecked=112, Total=3422 [2023-09-01 09:05:23,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-09-01 09:05:23,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 702 transitions, 8405 flow. Second operand has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:05:23,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:05:23,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-09-01 09:05:23,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:05:31,702 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] [2023-09-01 09:06:07,892 INFO L130 PetriNetUnfolder]: 10009/18967 cut-off events. [2023-09-01 09:06:07,892 INFO L131 PetriNetUnfolder]: For 215155/215155 co-relation queries the response was YES. [2023-09-01 09:06:07,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120731 conditions, 18967 events. 10009/18967 cut-off events. For 215155/215155 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 130616 event pairs, 891 based on Foata normal form. 268/19155 useless extension candidates. Maximal degree in co-relation 117979. Up to 6602 conditions per place. [2023-09-01 09:06:08,062 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 554 selfloop transitions, 1162 changer transitions 111/1827 dead transitions. [2023-09-01 09:06:08,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1827 transitions, 24299 flow [2023-09-01 09:06:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-09-01 09:06:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-09-01 09:06:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 15923 transitions. [2023-09-01 09:06:08,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31900869495532314 [2023-09-01 09:06:08,089 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 15923 transitions. [2023-09-01 09:06:08,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 15923 transitions. [2023-09-01 09:06:08,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:06:08,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 15923 transitions. [2023-09-01 09:06:08,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 89.96045197740114) internal successors, (15923), 177 states have internal predecessors, (15923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:08,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 282.0) internal successors, (50196), 178 states have internal predecessors, (50196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:08,162 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 282.0) internal successors, (50196), 178 states have internal predecessors, (50196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:08,162 INFO L175 Difference]: Start difference. First operand has 389 places, 702 transitions, 8405 flow. Second operand 177 states and 15923 transitions. [2023-09-01 09:06:08,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1827 transitions, 24299 flow [2023-09-01 09:06:08,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1827 transitions, 23444 flow, removed 332 selfloop flow, removed 16 redundant places. [2023-09-01 09:06:08,849 INFO L231 Difference]: Finished difference. Result has 547 places, 1258 transitions, 17468 flow [2023-09-01 09:06:08,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=17468, PETRI_PLACES=547, PETRI_TRANSITIONS=1258} [2023-09-01 09:06:08,851 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 513 predicate places. [2023-09-01 09:06:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1258 transitions, 17468 flow [2023-09-01 09:06:08,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:08,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:08,852 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:08,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 09:06:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:06:09,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:06:09,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash -620239400, now seen corresponding path program 2 times [2023-09-01 09:06:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106355444] [2023-09-01 09:06:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:06:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 09:06:09,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:06:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106355444] [2023-09-01 09:06:09,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106355444] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:06:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602775634] [2023-09-01 09:06:09,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 09:06:09,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:06:09,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:06:09,389 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) [2023-09-01 09:06:09,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 09:06:09,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 09:06:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:06:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 09:06:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:06:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 09:06:09,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:06:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 09:06:09,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602775634] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:06:09,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:06:09,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-09-01 09:06:09,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8300197] [2023-09-01 09:06:09,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:06:09,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 09:06:09,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:06:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 09:06:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-09-01 09:06:09,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 282 [2023-09-01 09:06:09,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1258 transitions, 17468 flow. Second operand has 22 states, 22 states have (on average 126.04545454545455) internal successors, (2773), 22 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:09,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:06:09,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 282 [2023-09-01 09:06:09,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:06:16,805 INFO L130 PetriNetUnfolder]: 11059/21057 cut-off events. [2023-09-01 09:06:16,805 INFO L131 PetriNetUnfolder]: For 256578/256578 co-relation queries the response was YES. [2023-09-01 09:06:16,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144569 conditions, 21057 events. 11059/21057 cut-off events. For 256578/256578 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 148645 event pairs, 2637 based on Foata normal form. 108/21141 useless extension candidates. Maximal degree in co-relation 142455. Up to 7194 conditions per place. [2023-09-01 09:06:17,002 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 988 selfloop transitions, 783 changer transitions 12/1783 dead transitions. [2023-09-01 09:06:17,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1783 transitions, 27588 flow [2023-09-01 09:06:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 09:06:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 09:06:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3537 transitions. [2023-09-01 09:06:17,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645390070921986 [2023-09-01 09:06:17,010 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3537 transitions. [2023-09-01 09:06:17,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3537 transitions. [2023-09-01 09:06:17,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:06:17,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3537 transitions. [2023-09-01 09:06:17,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 131.0) internal successors, (3537), 27 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:17,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:17,021 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:17,021 INFO L175 Difference]: Start difference. First operand has 547 places, 1258 transitions, 17468 flow. Second operand 27 states and 3537 transitions. [2023-09-01 09:06:17,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1783 transitions, 27588 flow [2023-09-01 09:06:18,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1783 transitions, 25646 flow, removed 825 selfloop flow, removed 22 redundant places. [2023-09-01 09:06:18,135 INFO L231 Difference]: Finished difference. Result has 553 places, 1366 transitions, 20221 flow [2023-09-01 09:06:18,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=15519, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20221, PETRI_PLACES=553, PETRI_TRANSITIONS=1366} [2023-09-01 09:06:18,137 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 519 predicate places. [2023-09-01 09:06:18,137 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1366 transitions, 20221 flow [2023-09-01 09:06:18,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 126.04545454545455) internal successors, (2773), 22 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:06:18,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:18,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:18,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 09:06:18,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:06:18,338 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:06:18,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1841042545, now seen corresponding path program 3 times [2023-09-01 09:06:18,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:18,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152318616] [2023-09-01 09:06:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:06:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:06:20,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:06:20,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152318616] [2023-09-01 09:06:20,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152318616] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:06:20,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692639788] [2023-09-01 09:06:20,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 09:06:20,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:06:20,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:06:20,213 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) [2023-09-01 09:06:20,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 09:06:20,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 09:06:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:06:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 95 conjunts are in the unsatisfiable core [2023-09-01 09:06:20,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:06:20,662 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 15 treesize of output 11 [2023-09-01 09:06:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:06:21,197 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 49 treesize of output 36 [2023-09-01 09:06:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:06:21,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-09-01 09:06:22,582 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 75 treesize of output 43 [2023-09-01 09:06:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:06:22,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:06:26,845 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 54 treesize of output 46 [2023-09-01 09:06:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:06:27,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692639788] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:06:27,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:06:27,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 78 [2023-09-01 09:06:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196424865] [2023-09-01 09:06:27,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:06:27,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-09-01 09:06:27,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:06:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-09-01 09:06:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=5875, Unknown=1, NotChecked=0, Total=6162 [2023-09-01 09:06:29,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:31,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:34,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:37,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:43,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:45,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:53,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:06:58,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:07:02,860 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] [2023-09-01 09:07:02,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 282 [2023-09-01 09:07:02,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1366 transitions, 20221 flow. Second operand has 79 states, 79 states have (on average 100.9367088607595) internal successors, (7974), 79 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:07:02,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:07:02,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 282 [2023-09-01 09:07:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:08:07,078 INFO L130 PetriNetUnfolder]: 22476/42944 cut-off events. [2023-09-01 09:08:07,078 INFO L131 PetriNetUnfolder]: For 538982/538982 co-relation queries the response was YES. [2023-09-01 09:08:07,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297588 conditions, 42944 events. 22476/42944 cut-off events. For 538982/538982 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 339032 event pairs, 2932 based on Foata normal form. 330/43232 useless extension candidates. Maximal degree in co-relation 295177. Up to 14329 conditions per place. [2023-09-01 09:08:07,688 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 822 selfloop transitions, 2499 changer transitions 108/3429 dead transitions. [2023-09-01 09:08:07,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 3429 transitions, 55268 flow [2023-09-01 09:08:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-09-01 09:08:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-09-01 09:08:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 16861 transitions. [2023-09-01 09:08:07,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36907888976446895 [2023-09-01 09:08:07,707 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 16861 transitions. [2023-09-01 09:08:07,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 16861 transitions. [2023-09-01 09:08:07,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:08:07,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 16861 transitions. [2023-09-01 09:08:07,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 104.08024691358025) internal successors, (16861), 162 states have internal predecessors, (16861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:08:07,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:08:07,773 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 282.0) internal successors, (45966), 163 states have internal predecessors, (45966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:08:07,773 INFO L175 Difference]: Start difference. First operand has 553 places, 1366 transitions, 20221 flow. Second operand 162 states and 16861 transitions. [2023-09-01 09:08:07,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 3429 transitions, 55268 flow [2023-09-01 09:08:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 3429 transitions, 53004 flow, removed 591 selfloop flow, removed 11 redundant places. [2023-09-01 09:08:11,179 INFO L231 Difference]: Finished difference. Result has 721 places, 2719 transitions, 45550 flow [2023-09-01 09:08:11,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=19206, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=45550, PETRI_PLACES=721, PETRI_TRANSITIONS=2719} [2023-09-01 09:08:11,181 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 687 predicate places. [2023-09-01 09:08:11,181 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 2719 transitions, 45550 flow [2023-09-01 09:08:11,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 100.9367088607595) internal successors, (7974), 79 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:08:11,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:08:11,183 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:08:11,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 09:08:11,394 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,SelfDestructingSolverStorable14 [2023-09-01 09:08:11,394 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:08:11,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:08:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -809020241, now seen corresponding path program 4 times [2023-09-01 09:08:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:08:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039419801] [2023-09-01 09:08:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:08:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:08:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:08:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:08:13,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:08:13,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039419801] [2023-09-01 09:08:13,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039419801] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:08:13,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860860296] [2023-09-01 09:08:13,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 09:08:13,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:08:13,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:08:13,535 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) [2023-09-01 09:08:13,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 09:08:13,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 09:08:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:08:13,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 114 conjunts are in the unsatisfiable core [2023-09-01 09:08:13,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:08:13,699 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 09:08:13,699 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 15 treesize of output 15 [2023-09-01 09:08:13,885 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 [2023-09-01 09:08:13,944 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 21 [2023-09-01 09:08:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:08:14,313 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 30 treesize of output 25 [2023-09-01 09:08:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:08:14,612 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 30 treesize of output 25 [2023-09-01 09:08:15,294 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 56 treesize of output 32 [2023-09-01 09:08:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:08:15,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:08:18,727 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_754 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_754) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-09-01 09:08:18,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 09:08:18,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-09-01 09:08:18,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 09:08:18,742 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 49 treesize of output 52 [2023-09-01 09:08:18,748 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 28 treesize of output 22 [2023-09-01 09:08:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:08:19,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860860296] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:08:19,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:08:19,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 26] total 82 [2023-09-01 09:08:19,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57335395] [2023-09-01 09:08:19,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:08:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-09-01 09:08:19,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:08:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-09-01 09:08:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=6419, Unknown=1, NotChecked=162, Total=6972 [2023-09-01 09:08:19,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-09-01 09:08:19,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 2719 transitions, 45550 flow. Second operand has 84 states, 84 states have (on average 86.77380952380952) internal successors, (7289), 84 states have internal predecessors, (7289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:08:19,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:08:19,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-09-01 09:08:19,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:08:50,305 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] [2023-09-01 09:10:29,455 INFO L130 PetriNetUnfolder]: 27382/52529 cut-off events. [2023-09-01 09:10:29,455 INFO L131 PetriNetUnfolder]: For 712845/712845 co-relation queries the response was YES. [2023-09-01 09:10:30,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382265 conditions, 52529 events. 27382/52529 cut-off events. For 712845/712845 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 426469 event pairs, 2543 based on Foata normal form. 436/52918 useless extension candidates. Maximal degree in co-relation 379721. Up to 17445 conditions per place. [2023-09-01 09:10:30,419 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 622 selfloop transitions, 3396 changer transitions 162/4180 dead transitions. [2023-09-01 09:10:30,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 4180 transitions, 73715 flow [2023-09-01 09:10:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2023-09-01 09:10:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2023-09-01 09:10:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 20413 transitions. [2023-09-01 09:10:30,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31748475799427645 [2023-09-01 09:10:30,441 INFO L72 ComplementDD]: Start complementDD. Operand 228 states and 20413 transitions. [2023-09-01 09:10:30,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 228 states and 20413 transitions. [2023-09-01 09:10:30,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:10:30,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 228 states and 20413 transitions. [2023-09-01 09:10:30,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 229 states, 228 states have (on average 89.53070175438596) internal successors, (20413), 228 states have internal predecessors, (20413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:10:30,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 229 states, 229 states have (on average 282.0) internal successors, (64578), 229 states have internal predecessors, (64578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:10:30,527 INFO L81 ComplementDD]: Finished complementDD. Result has 229 states, 229 states have (on average 282.0) internal successors, (64578), 229 states have internal predecessors, (64578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:10:30,527 INFO L175 Difference]: Start difference. First operand has 721 places, 2719 transitions, 45550 flow. Second operand 228 states and 20413 transitions. [2023-09-01 09:10:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 4180 transitions, 73715 flow [2023-09-01 09:10:36,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 4180 transitions, 69144 flow, removed 560 selfloop flow, removed 37 redundant places. [2023-09-01 09:10:36,326 INFO L231 Difference]: Finished difference. Result has 935 places, 3523 transitions, 62303 flow [2023-09-01 09:10:36,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=40768, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=228, PETRI_FLOW=62303, PETRI_PLACES=935, PETRI_TRANSITIONS=3523} [2023-09-01 09:10:36,328 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 901 predicate places. [2023-09-01 09:10:36,329 INFO L495 AbstractCegarLoop]: Abstraction has has 935 places, 3523 transitions, 62303 flow [2023-09-01 09:10:36,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 86.77380952380952) internal successors, (7289), 84 states have internal predecessors, (7289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:10:36,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:10:36,330 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:10:36,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 09:10:36,535 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,SelfDestructingSolverStorable15 [2023-09-01 09:10:36,536 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:10:36,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:10:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1167852704, now seen corresponding path program 3 times [2023-09-01 09:10:36,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:10:36,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947162127] [2023-09-01 09:10:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:10:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:10:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:10:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 09:10:36,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:10:36,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947162127] [2023-09-01 09:10:36,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947162127] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:10:36,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649541602] [2023-09-01 09:10:36,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 09:10:36,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:10:36,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:10:36,949 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) [2023-09-01 09:10:36,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 09:10:37,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 09:10:37,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:10:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 09:10:37,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:10:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 09:10:37,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:10:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 09:10:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649541602] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:10:37,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:10:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2023-09-01 09:10:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278659672] [2023-09-01 09:10:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:10:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 09:10:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:10:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 09:10:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2023-09-01 09:10:37,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2023-09-01 09:10:37,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 935 places, 3523 transitions, 62303 flow. Second operand has 27 states, 27 states have (on average 126.96296296296296) internal successors, (3428), 27 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:10:37,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:10:37,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2023-09-01 09:10:37,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:11:22,969 INFO L130 PetriNetUnfolder]: 36192/69407 cut-off events. [2023-09-01 09:11:22,970 INFO L131 PetriNetUnfolder]: For 970660/970660 co-relation queries the response was YES. [2023-09-01 09:11:24,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527955 conditions, 69407 events. 36192/69407 cut-off events. For 970660/970660 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 580075 event pairs, 9846 based on Foata normal form. 118/69478 useless extension candidates. Maximal degree in co-relation 525311. Up to 22801 conditions per place. [2023-09-01 09:11:24,733 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 3905 selfloop transitions, 2027 changer transitions 18/5950 dead transitions. [2023-09-01 09:11:24,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 968 places, 5950 transitions, 112358 flow [2023-09-01 09:11:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 09:11:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 09:11:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4520 transitions. [2023-09-01 09:11:24,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714226115978306 [2023-09-01 09:11:24,736 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4520 transitions. [2023-09-01 09:11:24,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4520 transitions. [2023-09-01 09:11:24,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:11:24,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4520 transitions. [2023-09-01 09:11:24,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 132.94117647058823) internal successors, (4520), 34 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:11:24,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 282.0) internal successors, (9870), 35 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:11:24,748 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 282.0) internal successors, (9870), 35 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:11:24,749 INFO L175 Difference]: Start difference. First operand has 935 places, 3523 transitions, 62303 flow. Second operand 34 states and 4520 transitions. [2023-09-01 09:11:24,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 968 places, 5950 transitions, 112358 flow [2023-09-01 09:11:36,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 890 places, 5950 transitions, 107804 flow, removed 1114 selfloop flow, removed 78 redundant places. [2023-09-01 09:11:37,008 INFO L231 Difference]: Finished difference. Result has 901 places, 4050 transitions, 76542 flow [2023-09-01 09:11:37,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=59409, PETRI_DIFFERENCE_MINUEND_PLACES=857, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=76542, PETRI_PLACES=901, PETRI_TRANSITIONS=4050} [2023-09-01 09:11:37,012 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 867 predicate places. [2023-09-01 09:11:37,012 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 4050 transitions, 76542 flow [2023-09-01 09:11:37,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 126.96296296296296) internal successors, (3428), 27 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:11:37,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:11:37,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:11:37,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 09:11:37,213 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,SelfDestructingSolverStorable16 [2023-09-01 09:11:37,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:11:37,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:11:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -381583219, now seen corresponding path program 5 times [2023-09-01 09:11:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:11:37,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967658776] [2023-09-01 09:11:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:11:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:11:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:11:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:11:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:11:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967658776] [2023-09-01 09:11:39,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967658776] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:11:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180589805] [2023-09-01 09:11:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 09:11:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:11:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:11:39,964 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) [2023-09-01 09:11:39,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 09:11:40,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 09:11:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:11:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 120 conjunts are in the unsatisfiable core [2023-09-01 09:11:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:11:40,443 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 15 treesize of output 11 [2023-09-01 09:11:40,970 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 45 treesize of output 32 [2023-09-01 09:11:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:11:41,435 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 49 treesize of output 36 [2023-09-01 09:11:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 09:11:41,938 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 49 treesize of output 36 [2023-09-01 09:11:43,216 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 75 treesize of output 43 [2023-09-01 09:11:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:11:43,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:11:52,750 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 54 treesize of output 46 [2023-09-01 09:11:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:11:53,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180589805] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:11:53,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:11:53,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32, 35] total 103 [2023-09-01 09:11:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888251465] [2023-09-01 09:11:53,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:11:53,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-09-01 09:11:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:11:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-09-01 09:11:53,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=10293, Unknown=1, NotChecked=0, Total=10712 [2023-09-01 09:12:19,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 282 [2023-09-01 09:12:19,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 4050 transitions, 76542 flow. Second operand has 104 states, 104 states have (on average 105.90384615384616) internal successors, (11014), 104 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:12:19,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:12:19,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 282 [2023-09-01 09:12:19,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:12:51,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:13:02,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:13:04,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:13:21,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:13:41,348 WARN L222 SmtUtils]: Spent 19.71s on a formula simplification. DAG size of input: 126 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 09:14:17,845 WARN L222 SmtUtils]: Spent 33.45s on a formula simplification. DAG size of input: 160 DAG size of output: 159 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 09:14:23,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:14:40,146 WARN L222 SmtUtils]: Spent 14.54s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 09:14:46,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:14:47,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:14:54,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 09:15:09,767 WARN L222 SmtUtils]: Spent 14.46s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 09:15:25,824 WARN L222 SmtUtils]: Spent 15.17s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15