./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c -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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:59:14,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:59:14,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:59:14,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:59:14,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:59:14,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:59:14,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:59:14,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:59:14,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:59:14,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:59:14,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:59:14,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:59:14,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:59:14,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:59:14,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:59:14,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:59:14,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:59:14,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:59:14,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:59:14,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:59:14,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:59:14,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:59:14,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:59:14,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:59:14,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:59:14,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:59:14,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:59:14,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:59:14,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:59:14,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:59:14,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:59:14,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:59:14,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:59:14,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:59:14,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:59:14,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:59:14,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:59:14,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:59:14,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:59:14,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:59:14,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:59:14,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:59:14,363 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:59:14,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:59:14,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:59:14,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:59:14,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:59:14,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:59:14,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:59:14,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:59:14,367 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:59:14,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:59:14,368 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:59:14,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:59:14,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:59:14,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:59:14,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:59:14,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:59:14,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:59:14,369 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:59:14,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:59:14,369 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:59:14,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:59:14,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:59:14,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:59:14,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:59:14,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:59:14,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:59:14,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:59:14,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:59:14,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:59:14,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:59:14,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:59:14,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:59:14,372 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:59:14,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:59:14,372 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:59:14,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:59:14,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:59:14,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:59:14,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:59:14,663 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:59:14,663 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:59:14,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-08-30 18:59:15,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:59:16,020 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:59:16,020 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-08-30 18:59:16,026 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f96044456/a54cded17c1e452da720c854fcd1649e/FLAG473317bb7 [2023-08-30 18:59:16,036 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f96044456/a54cded17c1e452da720c854fcd1649e [2023-08-30 18:59:16,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:59:16,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:59:16,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:59:16,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:59:16,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:59:16,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624f77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16, skipping insertion in model container [2023-08-30 18:59:16,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:59:16,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:59:16,295 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-08-30 18:59:16,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:59:16,326 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:59:16,365 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2023-08-30 18:59:16,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:59:16,406 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:59:16,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16 WrapperNode [2023-08-30 18:59:16,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:59:16,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:59:16,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:59:16,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:59:16,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,477 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-08-30 18:59:16,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:59:16,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:59:16,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:59:16,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:59:16,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:59:16,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:59:16,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:59:16,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:59:16,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (1/1) ... [2023-08-30 18:59:16,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:59:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:16,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:59:16,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:59:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:59:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:59:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:59:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:59:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:59:16,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:59:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:59:16,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:59:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 18:59:16,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 18:59:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:59:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:59:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:59:16,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:59:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:59:16,613 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:59:16,735 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:59:16,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:59:17,130 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:59:17,141 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:59:17,141 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 18:59:17,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:59:17 BoogieIcfgContainer [2023-08-30 18:59:17,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:59:17,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:59:17,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:59:17,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:59:17,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:59:16" (1/3) ... [2023-08-30 18:59:17,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4270bf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:59:17, skipping insertion in model container [2023-08-30 18:59:17,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:59:16" (2/3) ... [2023-08-30 18:59:17,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4270bf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:59:17, skipping insertion in model container [2023-08-30 18:59:17,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:59:17" (3/3) ... [2023-08-30 18:59:17,165 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-08-30 18:59:17,172 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:59:17,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:59:17,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:59:17,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:59:17,328 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:59:17,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 360 transitions, 744 flow [2023-08-30 18:59:17,557 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2023-08-30 18:59:17,557 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:59:17,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 26/357 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-08-30 18:59:17,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 360 transitions, 744 flow [2023-08-30 18:59:17,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 347 transitions, 712 flow [2023-08-30 18:59:17,577 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:59:17,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 347 transitions, 712 flow [2023-08-30 18:59:17,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 347 transitions, 712 flow [2023-08-30 18:59:17,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 347 transitions, 712 flow [2023-08-30 18:59:17,667 INFO L130 PetriNetUnfolder]: 26/347 cut-off events. [2023-08-30 18:59:17,667 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:59:17,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 26/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 807 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-08-30 18:59:17,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-08-30 18:59:27,745 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-08-30 18:59:27,745 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-08-30 18:59:27,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:59:27,761 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;@582c2f6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:59:27,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:59:27,777 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 18:59:27,777 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:59:27,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:27,778 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] [2023-08-30 18:59:27,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:59:27,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:27,783 INFO L85 PathProgramCache]: Analyzing trace with hash 938001691, now seen corresponding path program 1 times [2023-08-30 18:59:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472824611] [2023-08-30 18:59:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:28,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472824611] [2023-08-30 18:59:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472824611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:28,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:28,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:59:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845280851] [2023-08-30 18:59:28,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:59:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:59:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:59:28,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 771 [2023-08-30 18:59:28,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:28,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 771 [2023-08-30 18:59:28,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:28,399 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2023-08-30 18:59:28,400 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 18:59:28,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-08-30 18:59:28,403 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-30 18:59:28,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-08-30 18:59:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:59:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:59:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-30 18:59:28,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43925637699956765 [2023-08-30 18:59:28,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-30 18:59:28,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-30 18:59:28,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:28,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-30 18:59:28,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,439 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1016 transitions. [2023-08-30 18:59:28,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-08-30 18:59:28,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 18:59:28,444 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-08-30 18:59:28,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-08-30 18:59:28,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 18:59:28,448 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-08-30 18:59:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:28,449 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] [2023-08-30 18:59:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:59:28,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:59:28,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1524160958, now seen corresponding path program 1 times [2023-08-30 18:59:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913373453] [2023-08-30 18:59:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913373453] [2023-08-30 18:59:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913373453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866023419] [2023-08-30 18:59:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:28,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:28,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:59:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:28,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 18:59:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:28,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866023419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:28,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:28,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:59:28,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558868550] [2023-08-30 18:59:28,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:28,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:59:28,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:59:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:59:28,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 771 [2023-08-30 18:59:28,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 331.85714285714283) internal successors, (2323), 7 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:28,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:28,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 771 [2023-08-30 18:59:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:29,002 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2023-08-30 18:59:29,002 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:59:29,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-08-30 18:59:29,004 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-30 18:59:29,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-08-30 18:59:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:59:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:59:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1669 transitions. [2023-08-30 18:59:29,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329442282749676 [2023-08-30 18:59:29,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1669 transitions. [2023-08-30 18:59:29,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1669 transitions. [2023-08-30 18:59:29,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:29,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1669 transitions. [2023-08-30 18:59:29,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 333.8) internal successors, (1669), 5 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,022 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1669 transitions. [2023-08-30 18:59:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-08-30 18:59:29,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:29,023 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-08-30 18:59:29,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 18:59:29,024 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-30 18:59:29,024 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-08-30 18:59:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 331.85714285714283) internal successors, (2323), 7 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:29,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:29,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:29,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:59:29,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash -793936030, now seen corresponding path program 2 times [2023-08-30 18:59:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439294570] [2023-08-30 18:59:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:29,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:29,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439294570] [2023-08-30 18:59:29,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439294570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:29,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:29,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:59:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675801219] [2023-08-30 18:59:29,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:29,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:59:29,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:29,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:59:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:59:29,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 771 [2023-08-30 18:59:29,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:29,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:29,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 771 [2023-08-30 18:59:29,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:30,020 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2023-08-30 18:59:30,020 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:59:30,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1711 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-08-30 18:59:30,023 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-08-30 18:59:30,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-08-30 18:59:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:59:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:59:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1286 transitions. [2023-08-30 18:59:30,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169909208819715 [2023-08-30 18:59:30,027 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1286 transitions. [2023-08-30 18:59:30,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1286 transitions. [2023-08-30 18:59:30,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:30,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1286 transitions. [2023-08-30 18:59:30,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,037 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,038 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1286 transitions. [2023-08-30 18:59:30,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-08-30 18:59:30,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 18:59:30,041 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-08-30 18:59:30,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-30 18:59:30,043 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-30 18:59:30,043 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-08-30 18:59:30,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:30,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:30,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 18:59:30,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:59:30,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash 529846484, now seen corresponding path program 1 times [2023-08-30 18:59:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:30,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617189864] [2023-08-30 18:59:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:30,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617189864] [2023-08-30 18:59:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617189864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:59:30,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:59:30,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:59:30,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272519207] [2023-08-30 18:59:30,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:59:30,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:59:30,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:30,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:59:30,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:59:30,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 771 [2023-08-30 18:59:30,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:30,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 771 [2023-08-30 18:59:30,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:30,706 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2023-08-30 18:59:30,706 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 18:59:30,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-08-30 18:59:30,709 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-08-30 18:59:30,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-08-30 18:59:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:59:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:59:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1328 transitions. [2023-08-30 18:59:30,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43060959792477305 [2023-08-30 18:59:30,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1328 transitions. [2023-08-30 18:59:30,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1328 transitions. [2023-08-30 18:59:30,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:30,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1328 transitions. [2023-08-30 18:59:30,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,724 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,724 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1328 transitions. [2023-08-30 18:59:30,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-08-30 18:59:30,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 18:59:30,726 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-08-30 18:59:30,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-30 18:59:30,727 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-30 18:59:30,727 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-08-30 18:59:30,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:30,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:30,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:30,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:59:30,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:59:30,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1499019307, now seen corresponding path program 1 times [2023-08-30 18:59:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:30,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226091590] [2023-08-30 18:59:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:59:32,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:32,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226091590] [2023-08-30 18:59:32,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226091590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:32,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110092495] [2023-08-30 18:59:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:32,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:32,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:32,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:32,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:59:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:59:32,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:33,457 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 202 treesize of output 138 [2023-08-30 18:59:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:34,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:36,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:36,053 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 200 treesize of output 108 [2023-08-30 18:59:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:59:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110092495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:36,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:36,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2023-08-30 18:59:36,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400240004] [2023-08-30 18:59:36,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:36,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:59:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:59:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 18:59:39,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 771 [2023-08-30 18:59:39,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 266.1515151515151) internal successors, (8783), 33 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:39,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:39,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 771 [2023-08-30 18:59:39,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:01,265 INFO L130 PetriNetUnfolder]: 2871/4544 cut-off events. [2023-08-30 19:00:01,266 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2023-08-30 19:00:01,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 4544 events. 2871/4544 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25278 event pairs, 148 based on Foata normal form. 15/3302 useless extension candidates. Maximal degree in co-relation 11225. Up to 1113 conditions per place. [2023-08-30 19:00:01,289 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 603 selfloop transitions, 231 changer transitions 99/933 dead transitions. [2023-08-30 19:00:01,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 933 transitions, 4425 flow [2023-08-30 19:00:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-08-30 19:00:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-08-30 19:00:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 30505 transitions. [2023-08-30 19:00:01,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35326338706688903 [2023-08-30 19:00:01,381 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 30505 transitions. [2023-08-30 19:00:01,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 30505 transitions. [2023-08-30 19:00:01,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:01,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 30505 transitions. [2023-08-30 19:00:01,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 272.36607142857144) internal successors, (30505), 112 states have internal predecessors, (30505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,605 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,606 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 112 states and 30505 transitions. [2023-08-30 19:00:01,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 933 transitions, 4425 flow [2023-08-30 19:00:01,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 933 transitions, 4305 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-30 19:00:01,625 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 1851 flow [2023-08-30 19:00:01,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2023-08-30 19:00:01,628 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-08-30 19:00:01,628 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 1851 flow [2023-08-30 19:00:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 266.1515151515151) internal successors, (8783), 33 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:01,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:01,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:01,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:01,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:00:01,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash -99656019, now seen corresponding path program 2 times [2023-08-30 19:00:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:01,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726452262] [2023-08-30 19:00:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:01,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:03,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:03,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726452262] [2023-08-30 19:00:03,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726452262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:03,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268483015] [2023-08-30 19:00:03,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:00:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:03,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:03,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:03,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:00:03,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:00:03,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 19:00:03,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:03,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:00:03,706 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 100 treesize of output 90 [2023-08-30 19:00:04,692 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 171 treesize of output 115 [2023-08-30 19:00:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:04,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:06,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:06,181 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 219 treesize of output 139 [2023-08-30 19:00:06,189 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 30 treesize of output 26 [2023-08-30 19:00:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268483015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:06,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:06,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 19:00:06,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011061467] [2023-08-30 19:00:06,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 19:00:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 19:00:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1075, Unknown=1, NotChecked=0, Total=1190 [2023-08-30 19:00:09,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-08-30 19:00:09,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 1851 flow. Second operand has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:09,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:09,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-08-30 19:00:09,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:22,493 INFO L130 PetriNetUnfolder]: 6428/10131 cut-off events. [2023-08-30 19:00:22,493 INFO L131 PetriNetUnfolder]: For 601915/601915 co-relation queries the response was YES. [2023-08-30 19:00:22,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109709 conditions, 10131 events. 6428/10131 cut-off events. For 601915/601915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64574 event pairs, 460 based on Foata normal form. 5/8713 useless extension candidates. Maximal degree in co-relation 109612. Up to 3098 conditions per place. [2023-08-30 19:00:22,655 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 416 selfloop transitions, 522 changer transitions 25/963 dead transitions. [2023-08-30 19:00:22,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 963 transitions, 11580 flow [2023-08-30 19:00:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 19:00:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 19:00:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 12488 transitions. [2023-08-30 19:00:22,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31759110907657484 [2023-08-30 19:00:22,677 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 12488 transitions. [2023-08-30 19:00:22,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 12488 transitions. [2023-08-30 19:00:22,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:22,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 12488 transitions. [2023-08-30 19:00:22,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 244.86274509803923) internal successors, (12488), 51 states have internal predecessors, (12488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:22,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:22,748 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:22,749 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 1851 flow. Second operand 51 states and 12488 transitions. [2023-08-30 19:00:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 963 transitions, 11580 flow [2023-08-30 19:00:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 963 transitions, 10471 flow, removed 518 selfloop flow, removed 17 redundant places. [2023-08-30 19:00:24,430 INFO L231 Difference]: Finished difference. Result has 254 places, 671 transitions, 8994 flow [2023-08-30 19:00:24,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8994, PETRI_PLACES=254, PETRI_TRANSITIONS=671} [2023-08-30 19:00:24,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-08-30 19:00:24,431 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 671 transitions, 8994 flow [2023-08-30 19:00:24,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:24,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:24,432 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:24,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:24,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:00:24,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1692020307, now seen corresponding path program 3 times [2023-08-30 19:00:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536325831] [2023-08-30 19:00:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:25,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536325831] [2023-08-30 19:00:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536325831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:25,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265317017] [2023-08-30 19:00:25,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:00:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:25,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:25,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:00:25,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:00:25,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-30 19:00:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:26,327 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 133 treesize of output 89 [2023-08-30 19:00:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:26,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:27,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:27,106 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 136 treesize of output 76 [2023-08-30 19:00:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265317017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:27,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:27,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-30 19:00:27,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274367350] [2023-08-30 19:00:27,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:27,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:00:27,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:00:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:00:28,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 771 [2023-08-30 19:00:28,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 671 transitions, 8994 flow. Second operand has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:28,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:28,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 771 [2023-08-30 19:00:28,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:33,906 INFO L130 PetriNetUnfolder]: 8336/12983 cut-off events. [2023-08-30 19:00:33,906 INFO L131 PetriNetUnfolder]: For 877237/877237 co-relation queries the response was YES. [2023-08-30 19:00:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147306 conditions, 12983 events. 8336/12983 cut-off events. For 877237/877237 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83351 event pairs, 1143 based on Foata normal form. 8/11887 useless extension candidates. Maximal degree in co-relation 147205. Up to 3916 conditions per place. [2023-08-30 19:00:34,079 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 962 selfloop transitions, 361 changer transitions 71/1394 dead transitions. [2023-08-30 19:00:34,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1394 transitions, 30002 flow [2023-08-30 19:00:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 19:00:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 19:00:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 8591 transitions. [2023-08-30 19:00:34,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842300639563487 [2023-08-30 19:00:34,091 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 8591 transitions. [2023-08-30 19:00:34,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 8591 transitions. [2023-08-30 19:00:34,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:34,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 8591 transitions. [2023-08-30 19:00:34,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 296.2413793103448) internal successors, (8591), 29 states have internal predecessors, (8591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:34,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:34,124 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:34,124 INFO L175 Difference]: Start difference. First operand has 254 places, 671 transitions, 8994 flow. Second operand 29 states and 8591 transitions. [2023-08-30 19:00:34,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1394 transitions, 30002 flow [2023-08-30 19:00:57,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1394 transitions, 13642 flow, removed 8142 selfloop flow, removed 4 redundant places. [2023-08-30 19:00:57,161 INFO L231 Difference]: Finished difference. Result has 297 places, 875 transitions, 7455 flow [2023-08-30 19:00:57,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7455, PETRI_PLACES=297, PETRI_TRANSITIONS=875} [2023-08-30 19:00:57,162 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2023-08-30 19:00:57,162 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 875 transitions, 7455 flow [2023-08-30 19:00:57,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:57,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:57,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:57,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:57,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:57,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:00:57,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1447694667, now seen corresponding path program 4 times [2023-08-30 19:00:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:57,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39715391] [2023-08-30 19:00:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:57,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39715391] [2023-08-30 19:00:58,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39715391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741432143] [2023-08-30 19:00:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:00:58,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:58,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:58,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:00:58,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:00:58,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:00:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:00:58,806 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 39 treesize of output 37 [2023-08-30 19:00:58,914 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 125 treesize of output 81 [2023-08-30 19:00:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:00:59,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:00,190 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (or (< (+ 2147483647 c_~name_1~0) c_~name_2~0) (<= c_~name_2~0 c_~name_1~0) (forall ((v_ArrVal_326 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0)))) (<= c_~result_4~0 0)) is different from false [2023-08-30 19:01:00,377 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (= c_~break_7~0 0))) (and (or .cse0 (<= c_~result_4~0 0)) (or (<= c_~name_1~0 c_~name_2~0) (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~i_5~0 3) (not .cse0)))) (and (forall ((v_ArrVal_326 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (or (< (+ 2147483647 c_~name_1~0) c_~name_2~0) (<= c_~name_2~0 c_~name_1~0) (forall ((v_ArrVal_326 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0))))) is different from false [2023-08-30 19:01:00,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:00,468 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 212 treesize of output 132 [2023-08-30 19:01:00,476 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 46 treesize of output 44 [2023-08-30 19:01:00,484 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 44 treesize of output 42 [2023-08-30 19:01:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 19:01:00,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741432143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:00,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:00,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-30 19:01:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742800840] [2023-08-30 19:01:00,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:00,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 19:01:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 19:01:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=8, NotChecked=118, Total=1056 [2023-08-30 19:01:00,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-08-30 19:01:00,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 875 transitions, 7455 flow. Second operand has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:00,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:00,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-08-30 19:01:00,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:12,367 INFO L130 PetriNetUnfolder]: 13749/21844 cut-off events. [2023-08-30 19:01:12,367 INFO L131 PetriNetUnfolder]: For 240435/240435 co-relation queries the response was YES. [2023-08-30 19:01:12,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118823 conditions, 21844 events. 13749/21844 cut-off events. For 240435/240435 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 157779 event pairs, 1668 based on Foata normal form. 21/20057 useless extension candidates. Maximal degree in co-relation 118715. Up to 4592 conditions per place. [2023-08-30 19:01:12,701 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1167 selfloop transitions, 668 changer transitions 73/1908 dead transitions. [2023-08-30 19:01:12,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1908 transitions, 21276 flow [2023-08-30 19:01:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 19:01:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 19:01:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 8895 transitions. [2023-08-30 19:01:12,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32047124945957634 [2023-08-30 19:01:12,715 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 8895 transitions. [2023-08-30 19:01:12,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 8895 transitions. [2023-08-30 19:01:12,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:12,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 8895 transitions. [2023-08-30 19:01:12,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 247.08333333333334) internal successors, (8895), 36 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:12,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 771.0) internal successors, (28527), 37 states have internal predecessors, (28527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:12,757 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 771.0) internal successors, (28527), 37 states have internal predecessors, (28527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:12,758 INFO L175 Difference]: Start difference. First operand has 297 places, 875 transitions, 7455 flow. Second operand 36 states and 8895 transitions. [2023-08-30 19:01:12,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1908 transitions, 21276 flow [2023-08-30 19:01:15,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1908 transitions, 20865 flow, removed 179 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:15,399 INFO L231 Difference]: Finished difference. Result has 341 places, 1237 transitions, 13386 flow [2023-08-30 19:01:15,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13386, PETRI_PLACES=341, PETRI_TRANSITIONS=1237} [2023-08-30 19:01:15,400 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2023-08-30 19:01:15,400 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1237 transitions, 13386 flow [2023-08-30 19:01:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:15,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:15,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:15,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:15,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:01:15,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1234564250, now seen corresponding path program 5 times [2023-08-30 19:01:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:15,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351424130] [2023-08-30 19:01:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:17,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:17,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351424130] [2023-08-30 19:01:17,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351424130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:17,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438759121] [2023-08-30 19:01:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:01:17,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:17,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:01:17,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:01:17,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 19:01:17,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:17,513 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 104 treesize of output 72 [2023-08-30 19:01:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:17,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:18,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:18,253 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 117 treesize of output 69 [2023-08-30 19:01:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:18,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438759121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:18,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:18,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2023-08-30 19:01:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071854329] [2023-08-30 19:01:18,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:01:18,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:01:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-08-30 19:01:21,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 771 [2023-08-30 19:01:21,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1237 transitions, 13386 flow. Second operand has 31 states, 31 states have (on average 276.1290322580645) internal successors, (8560), 31 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:21,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:21,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 771 [2023-08-30 19:01:21,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:34,011 INFO L130 PetriNetUnfolder]: 17724/29221 cut-off events. [2023-08-30 19:01:34,011 INFO L131 PetriNetUnfolder]: For 405257/405257 co-relation queries the response was YES. [2023-08-30 19:01:34,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176807 conditions, 29221 events. 17724/29221 cut-off events. For 405257/405257 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 233697 event pairs, 3151 based on Foata normal form. 64/26735 useless extension candidates. Maximal degree in co-relation 176668. Up to 10768 conditions per place. [2023-08-30 19:01:34,879 INFO L137 encePairwiseOnDemand]: 757/771 looper letters, 1573 selfloop transitions, 697 changer transitions 27/2297 dead transitions. [2023-08-30 19:01:34,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 2297 transitions, 30541 flow [2023-08-30 19:01:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 19:01:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 19:01:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 11639 transitions. [2023-08-30 19:01:34,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36819461579829804 [2023-08-30 19:01:34,903 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 11639 transitions. [2023-08-30 19:01:34,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 11639 transitions. [2023-08-30 19:01:34,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:34,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 11639 transitions. [2023-08-30 19:01:34,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 283.8780487804878) internal successors, (11639), 41 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:34,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:34,958 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:34,959 INFO L175 Difference]: Start difference. First operand has 341 places, 1237 transitions, 13386 flow. Second operand 41 states and 11639 transitions. [2023-08-30 19:01:34,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 2297 transitions, 30541 flow [2023-08-30 19:01:41,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 2297 transitions, 27987 flow, removed 1249 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:41,654 INFO L231 Difference]: Finished difference. Result has 397 places, 1552 transitions, 19131 flow [2023-08-30 19:01:41,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=12424, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19131, PETRI_PLACES=397, PETRI_TRANSITIONS=1552} [2023-08-30 19:01:41,655 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2023-08-30 19:01:41,655 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1552 transitions, 19131 flow [2023-08-30 19:01:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 276.1290322580645) internal successors, (8560), 31 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:41,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:41,656 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:41,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:41,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:41,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:01:41,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash -791885760, now seen corresponding path program 6 times [2023-08-30 19:01:41,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:41,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699005610] [2023-08-30 19:01:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:01:43,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699005610] [2023-08-30 19:01:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699005610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723320978] [2023-08-30 19:01:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:01:43,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:43,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:43,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:01:43,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:01:43,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 19:01:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:43,603 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 104 treesize of output 72 [2023-08-30 19:01:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:43,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:44,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:44,437 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 117 treesize of output 69 [2023-08-30 19:01:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:01:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723320978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:44,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-08-30 19:01:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811534614] [2023-08-30 19:01:44,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:01:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:01:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2023-08-30 19:01:47,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 771 [2023-08-30 19:01:47,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1552 transitions, 19131 flow. Second operand has 31 states, 31 states have (on average 275.1290322580645) internal successors, (8529), 31 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:47,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:47,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 771 [2023-08-30 19:01:47,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:01,052 INFO L130 PetriNetUnfolder]: 19652/32601 cut-off events. [2023-08-30 19:02:01,053 INFO L131 PetriNetUnfolder]: For 584593/584593 co-relation queries the response was YES. [2023-08-30 19:02:01,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221645 conditions, 32601 events. 19652/32601 cut-off events. For 584593/584593 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 267281 event pairs, 3374 based on Foata normal form. 60/29599 useless extension candidates. Maximal degree in co-relation 221483. Up to 11973 conditions per place. [2023-08-30 19:02:02,125 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1528 selfloop transitions, 696 changer transitions 1/2225 dead transitions. [2023-08-30 19:02:02,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2225 transitions, 32568 flow [2023-08-30 19:02:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 19:02:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 19:02:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 6238 transitions. [2023-08-30 19:02:02,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3677632354675156 [2023-08-30 19:02:02,135 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 6238 transitions. [2023-08-30 19:02:02,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 6238 transitions. [2023-08-30 19:02:02,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:02,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 6238 transitions. [2023-08-30 19:02:02,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 283.54545454545456) internal successors, (6238), 22 states have internal predecessors, (6238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:02,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 771.0) internal successors, (17733), 23 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:02,154 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 771.0) internal successors, (17733), 23 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:02,155 INFO L175 Difference]: Start difference. First operand has 397 places, 1552 transitions, 19131 flow. Second operand 22 states and 6238 transitions. [2023-08-30 19:02:02,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2225 transitions, 32568 flow [2023-08-30 19:02:14,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 2225 transitions, 31112 flow, removed 681 selfloop flow, removed 13 redundant places. [2023-08-30 19:02:14,254 INFO L231 Difference]: Finished difference. Result has 414 places, 1708 transitions, 23194 flow [2023-08-30 19:02:14,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=17851, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=23194, PETRI_PLACES=414, PETRI_TRANSITIONS=1708} [2023-08-30 19:02:14,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2023-08-30 19:02:14,256 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1708 transitions, 23194 flow [2023-08-30 19:02:14,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 275.1290322580645) internal successors, (8529), 31 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:14,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:14,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:14,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 19:02:14,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:14,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:02:14,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1590517810, now seen corresponding path program 7 times [2023-08-30 19:02:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116005150] [2023-08-30 19:02:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:14,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:15,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:15,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116005150] [2023-08-30 19:02:15,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116005150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:15,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394546223] [2023-08-30 19:02:15,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:02:15,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:15,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:15,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:02:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 19:02:15,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:15,528 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 120 treesize of output 80 [2023-08-30 19:02:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:15,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:16,552 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 19:02:16,553 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 109 treesize of output 56 [2023-08-30 19:02:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394546223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:16,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:16,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-30 19:02:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932724100] [2023-08-30 19:02:16,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:16,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:02:16,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:16,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:02:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-08-30 19:02:18,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 771 [2023-08-30 19:02:18,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1708 transitions, 23194 flow. Second operand has 28 states, 28 states have (on average 277.39285714285717) internal successors, (7767), 28 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:18,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:18,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 771 [2023-08-30 19:02:18,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:33,784 INFO L130 PetriNetUnfolder]: 19546/32381 cut-off events. [2023-08-30 19:02:33,784 INFO L131 PetriNetUnfolder]: For 694504/694504 co-relation queries the response was YES. [2023-08-30 19:02:34,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238080 conditions, 32381 events. 19546/32381 cut-off events. For 694504/694504 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 263486 event pairs, 3801 based on Foata normal form. 170/29891 useless extension candidates. Maximal degree in co-relation 237916. Up to 17228 conditions per place. [2023-08-30 19:02:34,845 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1602 selfloop transitions, 628 changer transitions 3/2233 dead transitions. [2023-08-30 19:02:34,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 2233 transitions, 34727 flow [2023-08-30 19:02:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 19:02:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 19:02:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 9387 transitions. [2023-08-30 19:02:34,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894234170498763 [2023-08-30 19:02:34,852 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 9387 transitions. [2023-08-30 19:02:34,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 9387 transitions. [2023-08-30 19:02:34,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:34,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 9387 transitions. [2023-08-30 19:02:34,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 284.45454545454544) internal successors, (9387), 33 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:34,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 771.0) internal successors, (26214), 34 states have internal predecessors, (26214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:34,883 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 771.0) internal successors, (26214), 34 states have internal predecessors, (26214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:34,884 INFO L175 Difference]: Start difference. First operand has 414 places, 1708 transitions, 23194 flow. Second operand 33 states and 9387 transitions. [2023-08-30 19:02:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 2233 transitions, 34727 flow [2023-08-30 19:02:47,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2233 transitions, 33484 flow, removed 471 selfloop flow, removed 12 redundant places. [2023-08-30 19:02:47,499 INFO L231 Difference]: Finished difference. Result has 445 places, 1762 transitions, 24887 flow [2023-08-30 19:02:47,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=22172, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=24887, PETRI_PLACES=445, PETRI_TRANSITIONS=1762} [2023-08-30 19:02:47,502 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2023-08-30 19:02:47,502 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1762 transitions, 24887 flow [2023-08-30 19:02:47,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 277.39285714285717) internal successors, (7767), 28 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:47,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:47,503 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:47,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:47,708 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,SelfDestructingSolverStorable10 [2023-08-30 19:02:47,708 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:02:47,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1714295696, now seen corresponding path program 8 times [2023-08-30 19:02:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:47,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504400065] [2023-08-30 19:02:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504400065] [2023-08-30 19:02:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504400065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235336623] [2023-08-30 19:02:48,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:02:48,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:48,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:48,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:48,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:02:48,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:02:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 19:02:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:48,707 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 110 treesize of output 78 [2023-08-30 19:02:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:48,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:49,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:49,171 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 117 treesize of output 69 [2023-08-30 19:02:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:02:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235336623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:49,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-30 19:02:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5264584] [2023-08-30 19:02:49,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:02:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:02:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:02:51,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 771 [2023-08-30 19:02:51,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1762 transitions, 24887 flow. Second operand has 23 states, 23 states have (on average 291.17391304347825) internal successors, (6697), 23 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:51,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:51,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 771 [2023-08-30 19:02:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:06,503 INFO L130 PetriNetUnfolder]: 20477/33896 cut-off events. [2023-08-30 19:03:06,503 INFO L131 PetriNetUnfolder]: For 713737/713737 co-relation queries the response was YES. [2023-08-30 19:03:07,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251655 conditions, 33896 events. 20477/33896 cut-off events. For 713737/713737 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 277767 event pairs, 5474 based on Foata normal form. 72/31184 useless extension candidates. Maximal degree in co-relation 251483. Up to 21954 conditions per place. [2023-08-30 19:03:07,893 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1890 selfloop transitions, 370 changer transitions 0/2260 dead transitions. [2023-08-30 19:03:07,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2260 transitions, 35918 flow [2023-08-30 19:03:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:03:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 19:03:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7811 transitions. [2023-08-30 19:03:07,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38965379626858226 [2023-08-30 19:03:07,902 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7811 transitions. [2023-08-30 19:03:07,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7811 transitions. [2023-08-30 19:03:07,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:07,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7811 transitions. [2023-08-30 19:03:07,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 300.4230769230769) internal successors, (7811), 26 states have internal predecessors, (7811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:07,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 771.0) internal successors, (20817), 27 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:07,929 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 771.0) internal successors, (20817), 27 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:07,929 INFO L175 Difference]: Start difference. First operand has 445 places, 1762 transitions, 24887 flow. Second operand 26 states and 7811 transitions. [2023-08-30 19:03:07,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2260 transitions, 35918 flow [2023-08-30 19:03:20,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2260 transitions, 34807 flow, removed 405 selfloop flow, removed 9 redundant places. [2023-08-30 19:03:20,922 INFO L231 Difference]: Finished difference. Result has 469 places, 1806 transitions, 25847 flow [2023-08-30 19:03:20,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=24109, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25847, PETRI_PLACES=469, PETRI_TRANSITIONS=1806} [2023-08-30 19:03:20,924 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 439 predicate places. [2023-08-30 19:03:20,924 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1806 transitions, 25847 flow [2023-08-30 19:03:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 291.17391304347825) internal successors, (6697), 23 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:20,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:20,925 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:20,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:21,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:03:21,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1663316273, now seen corresponding path program 9 times [2023-08-30 19:03:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:21,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132486558] [2023-08-30 19:03:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:21,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:21,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:21,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132486558] [2023-08-30 19:03:21,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132486558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:21,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503538351] [2023-08-30 19:03:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:03:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:21,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:21,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 19:03:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:03:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:21,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 19:03:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:22,352 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 155 treesize of output 99 [2023-08-30 19:03:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:22,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:23,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:23,148 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 164 treesize of output 92 [2023-08-30 19:03:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:03:23,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503538351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:23,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:23,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 27 [2023-08-30 19:03:23,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339261743] [2023-08-30 19:03:23,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:23,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:03:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:23,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:03:23,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-08-30 19:03:25,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 771 [2023-08-30 19:03:25,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1806 transitions, 25847 flow. Second operand has 28 states, 28 states have (on average 275.4642857142857) internal successors, (7713), 28 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:25,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:25,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 771 [2023-08-30 19:03:25,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:53,159 INFO L130 PetriNetUnfolder]: 30907/52503 cut-off events. [2023-08-30 19:03:53,159 INFO L131 PetriNetUnfolder]: For 919683/919683 co-relation queries the response was YES. [2023-08-30 19:03:54,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373771 conditions, 52503 events. 30907/52503 cut-off events. For 919683/919683 co-relation queries the response was YES. Maximal size of possible extension queue 2818. Compared 475643 event pairs, 3029 based on Foata normal form. 39/46586 useless extension candidates. Maximal degree in co-relation 373590. Up to 23670 conditions per place. [2023-08-30 19:03:55,210 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1976 selfloop transitions, 1471 changer transitions 206/3653 dead transitions. [2023-08-30 19:03:55,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 3653 transitions, 58010 flow [2023-08-30 19:03:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 19:03:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 19:03:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 14009 transitions. [2023-08-30 19:03:55,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633981841763943 [2023-08-30 19:03:55,223 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 14009 transitions. [2023-08-30 19:03:55,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 14009 transitions. [2023-08-30 19:03:55,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:55,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 14009 transitions. [2023-08-30 19:03:55,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 280.18) internal successors, (14009), 50 states have internal predecessors, (14009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:55,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 771.0) internal successors, (39321), 51 states have internal predecessors, (39321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:55,286 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 771.0) internal successors, (39321), 51 states have internal predecessors, (39321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:55,286 INFO L175 Difference]: Start difference. First operand has 469 places, 1806 transitions, 25847 flow. Second operand 50 states and 14009 transitions. [2023-08-30 19:03:55,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 3653 transitions, 58010 flow [2023-08-30 19:04:12,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 3653 transitions, 57136 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-08-30 19:04:12,984 INFO L231 Difference]: Finished difference. Result has 532 places, 2572 transitions, 42344 flow [2023-08-30 19:04:12,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=25442, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=42344, PETRI_PLACES=532, PETRI_TRANSITIONS=2572} [2023-08-30 19:04:12,986 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 502 predicate places. [2023-08-30 19:04:12,986 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 2572 transitions, 42344 flow [2023-08-30 19:04:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 275.4642857142857) internal successors, (7713), 28 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:12,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:04:12,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:04:12,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 19:04:13,193 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,SelfDestructingSolverStorable12 [2023-08-30 19:04:13,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:04:13,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:04:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash -886775817, now seen corresponding path program 10 times [2023-08-30 19:04:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:04:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168497831] [2023-08-30 19:04:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:04:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:04:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:04:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:13,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:04:13,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168497831] [2023-08-30 19:04:13,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168497831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:04:13,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465715899] [2023-08-30 19:04:13,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:04:13,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:13,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:13,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:04:13,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 19:04:13,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:04:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:04:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:04:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:04:14,285 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 120 treesize of output 80 [2023-08-30 19:04:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:04:15,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:15,221 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 223 treesize of output 119 [2023-08-30 19:04:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:04:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465715899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:04:15,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:04:15,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-30 19:04:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066116169] [2023-08-30 19:04:15,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:04:15,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:04:15,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:04:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:04:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:04:16,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 771 [2023-08-30 19:04:16,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 2572 transitions, 42344 flow. Second operand has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:16,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:04:16,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 771 [2023-08-30 19:04:16,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:57,890 INFO L130 PetriNetUnfolder]: 40045/67977 cut-off events. [2023-08-30 19:04:57,891 INFO L131 PetriNetUnfolder]: For 1557291/1557291 co-relation queries the response was YES. [2023-08-30 19:05:00,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544806 conditions, 67977 events. 40045/67977 cut-off events. For 1557291/1557291 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 633313 event pairs, 7564 based on Foata normal form. 50/61383 useless extension candidates. Maximal degree in co-relation 544599. Up to 25347 conditions per place. [2023-08-30 19:05:01,227 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 1774 selfloop transitions, 1935 changer transitions 127/3836 dead transitions. [2023-08-30 19:05:01,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 3836 transitions, 71516 flow [2023-08-30 19:05:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 19:05:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 19:05:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 9162 transitions. [2023-08-30 19:05:01,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333124137065394 [2023-08-30 19:05:01,233 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 9162 transitions. [2023-08-30 19:05:01,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 9162 transitions. [2023-08-30 19:05:01,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:05:01,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 9162 transitions. [2023-08-30 19:05:01,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 295.5483870967742) internal successors, (9162), 31 states have internal predecessors, (9162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:01,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 771.0) internal successors, (24672), 32 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:01,258 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 771.0) internal successors, (24672), 32 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:05:01,258 INFO L175 Difference]: Start difference. First operand has 532 places, 2572 transitions, 42344 flow. Second operand 31 states and 9162 transitions. [2023-08-30 19:05:01,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 3836 transitions, 71516 flow [2023-08-30 19:06:44,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 3836 transitions, 68581 flow, removed 1450 selfloop flow, removed 12 redundant places. [2023-08-30 19:06:44,828 INFO L231 Difference]: Finished difference. Result has 549 places, 3115 transitions, 56418 flow [2023-08-30 19:06:44,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=40895, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=56418, PETRI_PLACES=549, PETRI_TRANSITIONS=3115} [2023-08-30 19:06:44,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 519 predicate places. [2023-08-30 19:06:44,830 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 3115 transitions, 56418 flow [2023-08-30 19:06:44,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:44,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:06:44,831 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:06:44,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 19:06:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 19:06:45,031 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:06:45,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:06:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1934763223, now seen corresponding path program 11 times [2023-08-30 19:06:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:06:45,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580883667] [2023-08-30 19:06:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:06:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:06:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:06:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:45,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:06:45,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580883667] [2023-08-30 19:06:45,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580883667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:06:45,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494333520] [2023-08-30 19:06:45,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:06:45,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:06:45,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:06:45,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:06:45,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 19:06:45,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 19:06:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:06:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 19:06:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:06:46,068 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 128 treesize of output 84 [2023-08-30 19:06:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:46,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:06:47,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:06:47,186 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 108 treesize of output 68 [2023-08-30 19:06:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:06:47,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494333520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:06:47,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:06:47,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-30 19:06:47,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468032727] [2023-08-30 19:06:47,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:06:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 19:06:47,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:06:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 19:06:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-08-30 19:06:50,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 771 [2023-08-30 19:06:50,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 3115 transitions, 56418 flow. Second operand has 26 states, 26 states have (on average 274.34615384615387) internal successors, (7133), 26 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:06:50,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:06:50,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 771 [2023-08-30 19:06:50,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:07:44,671 INFO L130 PetriNetUnfolder]: 42508/75246 cut-off events. [2023-08-30 19:07:44,671 INFO L131 PetriNetUnfolder]: For 1693035/1693035 co-relation queries the response was YES. [2023-08-30 19:07:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566404 conditions, 75246 events. 42508/75246 cut-off events. For 1693035/1693035 co-relation queries the response was YES. Maximal size of possible extension queue 4199. Compared 751658 event pairs, 8773 based on Foata normal form. 23/69733 useless extension candidates. Maximal degree in co-relation 566190. Up to 30023 conditions per place. [2023-08-30 19:07:48,628 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 2160 selfloop transitions, 1926 changer transitions 57/4143 dead transitions. [2023-08-30 19:07:48,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 4143 transitions, 80468 flow [2023-08-30 19:07:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 19:07:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 19:07:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 9844 transitions. [2023-08-30 19:07:48,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647952566240504 [2023-08-30 19:07:48,634 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 9844 transitions. [2023-08-30 19:07:48,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 9844 transitions. [2023-08-30 19:07:48,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:07:48,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 9844 transitions. [2023-08-30 19:07:48,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 281.25714285714287) internal successors, (9844), 35 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:48,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 771.0) internal successors, (27756), 36 states have internal predecessors, (27756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:48,653 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 771.0) internal successors, (27756), 36 states have internal predecessors, (27756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:07:48,653 INFO L175 Difference]: Start difference. First operand has 549 places, 3115 transitions, 56418 flow. Second operand 35 states and 9844 transitions. [2023-08-30 19:07:48,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 4143 transitions, 80468 flow [2023-08-30 19:09:12,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 4143 transitions, 78641 flow, removed 842 selfloop flow, removed 10 redundant places. [2023-08-30 19:09:12,111 INFO L231 Difference]: Finished difference. Result has 588 places, 3517 transitions, 68675 flow [2023-08-30 19:09:12,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54885, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=68675, PETRI_PLACES=588, PETRI_TRANSITIONS=3517} [2023-08-30 19:09:12,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 558 predicate places. [2023-08-30 19:09:12,114 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 3517 transitions, 68675 flow [2023-08-30 19:09:12,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 274.34615384615387) internal successors, (7133), 26 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:12,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:09:12,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:09:12,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 19:09:12,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 19:09:12,316 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 19:09:12,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:09:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash 423070181, now seen corresponding path program 12 times [2023-08-30 19:09:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:09:12,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188652204] [2023-08-30 19:09:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:09:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:09:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:09:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:09:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:09:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188652204] [2023-08-30 19:09:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188652204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:09:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279363872] [2023-08-30 19:09:13,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:09:13,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:09:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:09:13,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:09:13,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 19:09:13,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 19:09:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:09:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 19:09:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:09:13,469 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 186 treesize of output 126 [2023-08-30 19:09:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:09:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:09:14,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:09:14,933 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 247 treesize of output 143 [2023-08-30 19:09:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 19:09:15,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279363872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:09:15,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:09:15,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-30 19:09:15,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520199497] [2023-08-30 19:09:15,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:09:15,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:09:15,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:09:15,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:09:15,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-08-30 19:09:17,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 771 [2023-08-30 19:09:17,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 3517 transitions, 68675 flow. Second operand has 28 states, 28 states have (on average 273.14285714285717) internal successors, (7648), 28 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:09:17,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:09:17,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 771 [2023-08-30 19:09:17,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:10:29,563 INFO L130 PetriNetUnfolder]: 44577/79238 cut-off events. [2023-08-30 19:10:29,563 INFO L131 PetriNetUnfolder]: For 1968419/1968419 co-relation queries the response was YES. [2023-08-30 19:10:33,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618479 conditions, 79238 events. 44577/79238 cut-off events. For 1968419/1968419 co-relation queries the response was YES. Maximal size of possible extension queue 4485. Compared 799466 event pairs, 9902 based on Foata normal form. 40/74696 useless extension candidates. Maximal degree in co-relation 618251. Up to 28015 conditions per place. [2023-08-30 19:10:33,899 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 2425 selfloop transitions, 2039 changer transitions 90/4554 dead transitions. [2023-08-30 19:10:33,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 4554 transitions, 92727 flow [2023-08-30 19:10:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 19:10:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 19:10:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 17053 transitions. [2023-08-30 19:10:33,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36259063171099915 [2023-08-30 19:10:33,908 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 17053 transitions. [2023-08-30 19:10:33,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 17053 transitions. [2023-08-30 19:10:33,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:10:33,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 17053 transitions. [2023-08-30 19:10:33,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 279.55737704918033) internal successors, (17053), 61 states have internal predecessors, (17053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:33,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 771.0) internal successors, (47802), 62 states have internal predecessors, (47802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:33,944 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 771.0) internal successors, (47802), 62 states have internal predecessors, (47802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:10:33,944 INFO L175 Difference]: Start difference. First operand has 588 places, 3517 transitions, 68675 flow. Second operand 61 states and 17053 transitions. [2023-08-30 19:10:33,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 4554 transitions, 92727 flow Killed by 15