./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-5.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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 15:09:38,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 15:09:38,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 15:09:38,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 15:09:38,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 15:09:38,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 15:09:38,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 15:09:38,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 15:09:38,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 15:09:38,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 15:09:38,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 15:09:38,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 15:09:38,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 15:09:38,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 15:09:38,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 15:09:38,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 15:09:38,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 15:09:38,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 15:09:38,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 15:09:38,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 15:09:38,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 15:09:38,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 15:09:38,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 15:09:38,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 15:09:38,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 15:09:38,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 15:09:38,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 15:09:38,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 15:09:38,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 15:09:38,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 15:09:38,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 15:09:38,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 15:09:38,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 15:09:38,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 15:09:38,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 15:09:38,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 15:09:38,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 15:09:38,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 15:09:38,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 15:09:38,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 15:09:38,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 15:09:38,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 15:09:38,328 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 15:09:38,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 15:09:38,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 15:09:38,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 15:09:38,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 15:09:38,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 15:09:38,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 15:09:38,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 15:09:38,332 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 15:09:38,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 15:09:38,333 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 15:09:38,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 15:09:38,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 15:09:38,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 15:09:38,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 15:09:38,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 15:09:38,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 15:09:38,334 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 15:09:38,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 15:09:38,335 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 15:09:38,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 15:09:38,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 15:09:38,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 15:09:38,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 15:09:38,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:09:38,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 15:09:38,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 15:09:38,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 15:09:38,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 15:09:38,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 15:09:38,337 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 15:09:38,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 15:09:38,338 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 15:09:38,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 15:09:38,338 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 15:09:38,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 15:09:38,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 15:09:38,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 15:09:38,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 15:09:38,634 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 15:09:38,634 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 15:09:38,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-09-01 15:09:39,872 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 15:09:40,105 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 15:09:40,105 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-09-01 15:09:40,111 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30a4a32e/77b6e91c9aed4a1bae0cc07156e9fa23/FLAGadc2a7f1d [2023-09-01 15:09:40,123 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30a4a32e/77b6e91c9aed4a1bae0cc07156e9fa23 [2023-09-01 15:09:40,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 15:09:40,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 15:09:40,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 15:09:40,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 15:09:40,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 15:09:40,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6706328b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40, skipping insertion in model container [2023-09-01 15:09:40,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 15:09:40,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 15:09:40,296 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/unroll-cond-5.wvr.c[2975,2988] [2023-09-01 15:09:40,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:09:40,311 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 15:09:40,332 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/unroll-cond-5.wvr.c[2975,2988] [2023-09-01 15:09:40,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:09:40,346 INFO L208 MainTranslator]: Completed translation [2023-09-01 15:09:40,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40 WrapperNode [2023-09-01 15:09:40,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 15:09:40,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 15:09:40,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 15:09:40,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 15:09:40,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,419 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 207 [2023-09-01 15:09:40,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 15:09:40,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 15:09:40,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 15:09:40,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 15:09:40,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 15:09:40,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 15:09:40,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 15:09:40,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 15:09:40,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (1/1) ... [2023-09-01 15:09:40,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:09:40,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:09:40,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 15:09:40,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 15:09:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 15:09:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 15:09:40,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 15:09:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 15:09:40,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 15:09:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 15:09:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 15:09:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 15:09:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 15:09:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 15:09:40,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 15:09:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 15:09:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 15:09:40,554 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 15:09:40,705 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 15:09:40,706 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 15:09:41,028 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 15:09:41,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 15:09:41,040 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 15:09:41,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:09:41 BoogieIcfgContainer [2023-09-01 15:09:41,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 15:09:41,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 15:09:41,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 15:09:41,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 15:09:41,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:09:40" (1/3) ... [2023-09-01 15:09:41,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668204cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:09:41, skipping insertion in model container [2023-09-01 15:09:41,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:09:40" (2/3) ... [2023-09-01 15:09:41,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668204cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:09:41, skipping insertion in model container [2023-09-01 15:09:41,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:09:41" (3/3) ... [2023-09-01 15:09:41,051 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-09-01 15:09:41,058 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 15:09:41,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 15:09:41,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 15:09:41,073 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 15:09:41,171 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 15:09:41,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 250 transitions, 516 flow [2023-09-01 15:09:41,316 INFO L130 PetriNetUnfolder]: 24/248 cut-off events. [2023-09-01 15:09:41,317 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:09:41,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 248 events. 24/248 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 480 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2023-09-01 15:09:41,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 250 transitions, 516 flow [2023-09-01 15:09:41,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 240 transitions, 492 flow [2023-09-01 15:09:41,333 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 15:09:41,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 240 transitions, 492 flow [2023-09-01 15:09:41,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 240 transitions, 492 flow [2023-09-01 15:09:41,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 240 transitions, 492 flow [2023-09-01 15:09:41,423 INFO L130 PetriNetUnfolder]: 24/240 cut-off events. [2023-09-01 15:09:41,423 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:09:41,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 240 events. 24/240 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 460 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2023-09-01 15:09:41,433 INFO L119 LiptonReduction]: Number of co-enabled transitions 6892 [2023-09-01 15:10:03,853 WARN L222 SmtUtils]: Spent 11.18s on a formula simplification. DAG size of input: 203 DAG size of output: 201 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 15:10:08,988 WARN L222 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 15:10:08,991 INFO L134 LiptonReduction]: Checked pairs total: 6654 [2023-09-01 15:10:08,991 INFO L136 LiptonReduction]: Total number of compositions: 300 [2023-09-01 15:10:09,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 15:10:09,007 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;@7b8b19f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 15:10:09,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 15:10:09,014 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 15:10:09,015 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:09,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:09,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:09,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:09,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 678661713, now seen corresponding path program 1 times [2023-09-01 15:10:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:09,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930262780] [2023-09-01 15:10:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930262780] [2023-09-01 15:10:09,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930262780] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:09,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:10:09,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432053545] [2023-09-01 15:10:09,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:09,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:09,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:09,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 550 [2023-09-01 15:10:09,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:09,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:09,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 550 [2023-09-01 15:10:09,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:09,699 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-09-01 15:10:09,699 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 15:10:09,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 189 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-09-01 15:10:09,702 INFO L137 encePairwiseOnDemand]: 547/550 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 15:10:09,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 15:10:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-09-01 15:10:09,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41393939393939394 [2023-09-01 15:10:09,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-09-01 15:10:09,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-09-01 15:10:09,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:09,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-09-01 15:10:09,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:09,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 550.0) internal successors, (2200), 4 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:09,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 550.0) internal successors, (2200), 4 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:09,745 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 683 transitions. [2023-09-01 15:10:09,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 15:10:09,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 15:10:09,750 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 15:10:09,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-09-01 15:10:09,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 15:10:09,755 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 15:10:09,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:09,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:09,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:09,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 15:10:09,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:09,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:09,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1026241164, now seen corresponding path program 1 times [2023-09-01 15:10:09,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:09,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932979813] [2023-09-01 15:10:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:10,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:10,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932979813] [2023-09-01 15:10:10,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932979813] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:10,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:10,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:10:10,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161857643] [2023-09-01 15:10:10,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:10,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:10,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:10:10,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 550 [2023-09-01 15:10:10,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:10,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 550 [2023-09-01 15:10:10,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:10,567 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-09-01 15:10:10,567 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 15:10:10,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-09-01 15:10:10,568 INFO L137 encePairwiseOnDemand]: 544/550 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 15:10:10,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-09-01 15:10:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1085 transitions. [2023-09-01 15:10:10,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39454545454545453 [2023-09-01 15:10:10,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1085 transitions. [2023-09-01 15:10:10,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1085 transitions. [2023-09-01 15:10:10,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:10,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1085 transitions. [2023-09-01 15:10:10,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,582 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1085 transitions. [2023-09-01 15:10:10,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-09-01 15:10:10,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:10,585 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-09-01 15:10:10,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-09-01 15:10:10,586 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 15:10:10,586 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-09-01 15:10:10,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:10,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:10,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 15:10:10,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:10,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:10,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1210956036, now seen corresponding path program 2 times [2023-09-01 15:10:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:10,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845976209] [2023-09-01 15:10:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:10,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:10,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845976209] [2023-09-01 15:10:10,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845976209] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:10,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:10,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:10:10,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091380325] [2023-09-01 15:10:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:10,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:10:10,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 550 [2023-09-01 15:10:10,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:10,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 550 [2023-09-01 15:10:10,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:11,143 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2023-09-01 15:10:11,144 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-09-01 15:10:11,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 647 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-09-01 15:10:11,145 INFO L137 encePairwiseOnDemand]: 544/550 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-09-01 15:10:11,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-09-01 15:10:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1096 transitions. [2023-09-01 15:10:11,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39854545454545454 [2023-09-01 15:10:11,149 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1096 transitions. [2023-09-01 15:10:11,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1096 transitions. [2023-09-01 15:10:11,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:11,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1096 transitions. [2023-09-01 15:10:11,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.2) internal successors, (1096), 5 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,159 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 1096 transitions. [2023-09-01 15:10:11,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-09-01 15:10:11,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:11,162 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-09-01 15:10:11,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-09-01 15:10:11,163 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-09-01 15:10:11,163 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-09-01 15:10:11,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:11,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:11,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 15:10:11,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:11,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1449066184, now seen corresponding path program 3 times [2023-09-01 15:10:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301947010] [2023-09-01 15:10:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:11,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:11,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:11,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301947010] [2023-09-01 15:10:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301947010] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:11,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:11,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:10:11,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854337898] [2023-09-01 15:10:11,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:10:11,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 550 [2023-09-01 15:10:11,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:11,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 550 [2023-09-01 15:10:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:11,684 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2023-09-01 15:10:11,684 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2023-09-01 15:10:11,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 734 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-09-01 15:10:11,687 INFO L137 encePairwiseOnDemand]: 544/550 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-09-01 15:10:11,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-09-01 15:10:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2023-09-01 15:10:11,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930909090909091 [2023-09-01 15:10:11,693 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2023-09-01 15:10:11,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2023-09-01 15:10:11,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:11,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2023-09-01 15:10:11,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.2) internal successors, (1081), 5 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,702 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 1081 transitions. [2023-09-01 15:10:11,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-09-01 15:10:11,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:11,707 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-09-01 15:10:11,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-09-01 15:10:11,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-09-01 15:10:11,709 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-09-01 15:10:11,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:11,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:11,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 15:10:11,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:11,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2041421108, now seen corresponding path program 4 times [2023-09-01 15:10:11,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:11,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812285354] [2023-09-01 15:10:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:11,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:11,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:11,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812285354] [2023-09-01 15:10:11,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812285354] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:11,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:11,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:10:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275528415] [2023-09-01 15:10:11,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:11,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:10:11,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 550 [2023-09-01 15:10:11,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:11,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:11,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 550 [2023-09-01 15:10:11,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:12,175 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2023-09-01 15:10:12,175 INFO L131 PetriNetUnfolder]: For 545/545 co-relation queries the response was YES. [2023-09-01 15:10:12,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 704 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-09-01 15:10:12,177 INFO L137 encePairwiseOnDemand]: 544/550 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-09-01 15:10:12,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-09-01 15:10:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1075 transitions. [2023-09-01 15:10:12,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2023-09-01 15:10:12,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1075 transitions. [2023-09-01 15:10:12,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1075 transitions. [2023-09-01 15:10:12,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:12,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1075 transitions. [2023-09-01 15:10:12,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,190 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 1075 transitions. [2023-09-01 15:10:12,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-09-01 15:10:12,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:12,194 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-09-01 15:10:12,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-09-01 15:10:12,196 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-09-01 15:10:12,196 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-09-01 15:10:12,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:12,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 15:10:12,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:12,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:12,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1949255900, now seen corresponding path program 5 times [2023-09-01 15:10:12,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:12,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210245739] [2023-09-01 15:10:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:12,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:12,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210245739] [2023-09-01 15:10:12,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210245739] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:12,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:12,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:10:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822438801] [2023-09-01 15:10:12,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:12,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:12,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:10:12,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 550 [2023-09-01 15:10:12,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:12,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 550 [2023-09-01 15:10:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:12,737 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2023-09-01 15:10:12,737 INFO L131 PetriNetUnfolder]: For 638/638 co-relation queries the response was YES. [2023-09-01 15:10:12,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 737 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-09-01 15:10:12,739 INFO L137 encePairwiseOnDemand]: 544/550 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-09-01 15:10:12,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-09-01 15:10:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1094 transitions. [2023-09-01 15:10:12,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978181818181818 [2023-09-01 15:10:12,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1094 transitions. [2023-09-01 15:10:12,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1094 transitions. [2023-09-01 15:10:12,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:12,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1094 transitions. [2023-09-01 15:10:12,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.8) internal successors, (1094), 5 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,751 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 1094 transitions. [2023-09-01 15:10:12,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-09-01 15:10:12,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-09-01 15:10:12,754 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-09-01 15:10:12,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-09-01 15:10:12,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-09-01 15:10:12,756 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-09-01 15:10:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:12,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:12,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:12,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 15:10:12,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:12,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1265068822, now seen corresponding path program 6 times [2023-09-01 15:10:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155028835] [2023-09-01 15:10:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155028835] [2023-09-01 15:10:12,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155028835] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:12,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:12,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 15:10:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91402287] [2023-09-01 15:10:12,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 15:10:13,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 550 [2023-09-01 15:10:13,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:13,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:13,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 550 [2023-09-01 15:10:13,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:13,204 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2023-09-01 15:10:13,204 INFO L131 PetriNetUnfolder]: For 674/674 co-relation queries the response was YES. [2023-09-01 15:10:13,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 677 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-09-01 15:10:13,206 INFO L137 encePairwiseOnDemand]: 544/550 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-09-01 15:10:13,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-09-01 15:10:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1090 transitions. [2023-09-01 15:10:13,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39636363636363636 [2023-09-01 15:10:13,210 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1090 transitions. [2023-09-01 15:10:13,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1090 transitions. [2023-09-01 15:10:13,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:13,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1090 transitions. [2023-09-01 15:10:13,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:13,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:13,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 550.0) internal successors, (3300), 6 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:13,218 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 1090 transitions. [2023-09-01 15:10:13,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-09-01 15:10:13,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 15:10:13,221 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-09-01 15:10:13,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-09-01 15:10:13,223 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-09-01 15:10:13,223 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-09-01 15:10:13,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:13,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:13,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:13,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 15:10:13,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:13,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:13,225 INFO L85 PathProgramCache]: Analyzing trace with hash -29277619, now seen corresponding path program 1 times [2023-09-01 15:10:13,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:13,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512808653] [2023-09-01 15:10:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:13,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512808653] [2023-09-01 15:10:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512808653] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072529583] [2023-09-01 15:10:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:13,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:13,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:13,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:13,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 15:10:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 15:10:13,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:15,180 INFO L321 Elim1Store]: treesize reduction 294, result has 7.8 percent of original size [2023-09-01 15:10:15,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 537 treesize of output 386 [2023-09-01 15:10:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:22,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:41,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:41,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 329 treesize of output 213 [2023-09-01 15:10:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:42,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072529583] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:42,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:42,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-09-01 15:10:42,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157799154] [2023-09-01 15:10:42,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:42,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 15:10:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:42,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 15:10:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 15:10:43,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 550 [2023-09-01 15:10:43,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 16 states, 16 states have (on average 167.0) internal successors, (2672), 16 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:43,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:43,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 550 [2023-09-01 15:10:43,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:47,448 INFO L130 PetriNetUnfolder]: 297/530 cut-off events. [2023-09-01 15:10:47,449 INFO L131 PetriNetUnfolder]: For 1701/1701 co-relation queries the response was YES. [2023-09-01 15:10:47,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 530 events. 297/530 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2219 event pairs, 24 based on Foata normal form. 4/450 useless extension candidates. Maximal degree in co-relation 1447. Up to 189 conditions per place. [2023-09-01 15:10:47,452 INFO L137 encePairwiseOnDemand]: 540/550 looper letters, 63 selfloop transitions, 37 changer transitions 58/158 dead transitions. [2023-09-01 15:10:47,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 158 transitions, 1339 flow [2023-09-01 15:10:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 15:10:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 15:10:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3404 transitions. [2023-09-01 15:10:47,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3094545454545455 [2023-09-01 15:10:47,463 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3404 transitions. [2023-09-01 15:10:47,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3404 transitions. [2023-09-01 15:10:47,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:47,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3404 transitions. [2023-09-01 15:10:47,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 170.2) internal successors, (3404), 20 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 550.0) internal successors, (11550), 21 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,491 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 550.0) internal successors, (11550), 21 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,491 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 20 states and 3404 transitions. [2023-09-01 15:10:47,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 158 transitions, 1339 flow [2023-09-01 15:10:47,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 158 transitions, 1269 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 15:10:47,500 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 565 flow [2023-09-01 15:10:47,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=565, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-09-01 15:10:47,502 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-09-01 15:10:47,502 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 565 flow [2023-09-01 15:10:47,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 167.0) internal successors, (2672), 16 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:47,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:47,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:47,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:47,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:47,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:47,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:47,713 INFO L85 PathProgramCache]: Analyzing trace with hash -418800640, now seen corresponding path program 1 times [2023-09-01 15:10:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:47,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120014882] [2023-09-01 15:10:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:47,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:48,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:48,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120014882] [2023-09-01 15:10:48,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120014882] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:48,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898877164] [2023-09-01 15:10:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:48,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:48,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:48,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 15:10:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 15:10:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:48,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:10:48,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:10:48,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:10:48,888 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-09-01 15:10:48,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 320 [2023-09-01 15:10:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:49,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:11:08,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:11:08,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 272 [2023-09-01 15:11:08,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:11:08,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 1536 treesize of output 1392 [2023-09-01 15:11:08,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:11:08,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 276 [2023-09-01 15:11:13,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:11:13,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 345 treesize of output 269 [2023-09-01 15:11:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:11:14,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898877164] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:11:14,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:11:14,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-09-01 15:11:14,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561371895] [2023-09-01 15:11:14,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:11:14,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 15:11:14,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:14,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 15:11:14,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=370, Unknown=3, NotChecked=0, Total=462 [2023-09-01 15:11:16,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:11:20,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:11:25,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:11:28,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:11:31,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:11:34,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 550 [2023-09-01 15:11:34,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 565 flow. Second operand has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:34,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:34,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 550 [2023-09-01 15:11:34,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:37,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:11:50,690 WARN L222 SmtUtils]: Spent 10.30s on a formula simplification. DAG size of input: 87 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:11:59,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:12:12,287 WARN L222 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 82 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:12:19,008 WARN L222 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 159 DAG size of output: 147 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:12:24,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:12:34,393 WARN L222 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 79 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:12:39,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:12:42,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:12:44,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:12:46,720 INFO L130 PetriNetUnfolder]: 562/1005 cut-off events. [2023-09-01 15:12:46,720 INFO L131 PetriNetUnfolder]: For 3357/3357 co-relation queries the response was YES. [2023-09-01 15:12:46,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4242 conditions, 1005 events. 562/1005 cut-off events. For 3357/3357 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5012 event pairs, 33 based on Foata normal form. 19/827 useless extension candidates. Maximal degree in co-relation 4176. Up to 353 conditions per place. [2023-09-01 15:12:46,727 INFO L137 encePairwiseOnDemand]: 539/550 looper letters, 146 selfloop transitions, 98 changer transitions 66/310 dead transitions. [2023-09-01 15:12:46,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 310 transitions, 2486 flow [2023-09-01 15:12:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 15:12:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 15:12:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5343 transitions. [2023-09-01 15:12:46,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24286363636363636 [2023-09-01 15:12:46,745 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5343 transitions. [2023-09-01 15:12:46,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5343 transitions. [2023-09-01 15:12:46,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:12:46,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5343 transitions. [2023-09-01 15:12:46,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 133.575) internal successors, (5343), 40 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:12:46,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 550.0) internal successors, (22550), 41 states have internal predecessors, (22550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:12:46,782 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 550.0) internal successors, (22550), 41 states have internal predecessors, (22550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:12:46,782 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 565 flow. Second operand 40 states and 5343 transitions. [2023-09-01 15:12:46,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 310 transitions, 2486 flow [2023-09-01 15:12:46,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 310 transitions, 2103 flow, removed 163 selfloop flow, removed 7 redundant places. [2023-09-01 15:12:46,798 INFO L231 Difference]: Finished difference. Result has 115 places, 134 transitions, 1273 flow [2023-09-01 15:12:46,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=550, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1273, PETRI_PLACES=115, PETRI_TRANSITIONS=134} [2023-09-01 15:12:46,799 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2023-09-01 15:12:46,799 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 134 transitions, 1273 flow [2023-09-01 15:12:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:12:46,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:12:46,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:12:46,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 15:12:47,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-09-01 15:12:47,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:12:47,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:12:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash -384436778, now seen corresponding path program 2 times [2023-09-01 15:12:47,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:12:47,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194439700] [2023-09-01 15:12:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:12:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:12:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:12:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:12:47,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:12:47,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194439700] [2023-09-01 15:12:47,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194439700] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:12:47,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790133470] [2023-09-01 15:12:47,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:12:47,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:12:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:12:47,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:12:47,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 15:12:47,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:12:47,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:12:47,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 15:12:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:12:47,776 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-09-01 15:12:47,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 320 [2023-09-01 15:12:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:12:48,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:21:38,015 WARN L222 SmtUtils]: Spent 8.60m on a formula simplification. DAG size of input: 5617 DAG size of output: 4993 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15