./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.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/parallel-min-max-1.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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --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 12:42:29,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:42:29,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:42:29,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:42:29,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:42:29,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:42:29,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:42:29,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:42:29,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:42:29,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:42:29,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:42:29,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:42:29,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:42:29,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:42:29,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:42:29,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:42:29,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:42:29,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:42:29,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:42:29,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:42:29,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:42:29,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:42:29,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:42:29,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:42:29,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:42:29,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:42:29,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:42:29,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:42:29,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:42:29,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:42:29,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:42:29,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:42:29,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:42:29,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:42:29,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:42:29,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:42:29,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:42:29,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:42:29,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:42:29,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:42:29,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:42:29,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:42:29,368 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:42:29,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:42:29,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:42:29,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:42:29,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:42:29,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:42:29,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:42:29,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:42:29,370 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:42:29,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:42:29,371 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:42:29,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:42:29,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:42:29,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:42:29,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:42:29,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:42:29,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:42:29,372 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:42:29,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:42:29,373 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:42:29,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:42:29,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:42:29,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:42:29,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:42:29,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:42:29,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:42:29,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:42:29,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:42:29,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:42:29,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:42:29,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:42:29,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:42:29,375 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:42:29,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:42:29,376 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:42:29,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:42:29,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:42:29,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:42:29,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:42:29,723 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:42:29,723 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:42:29,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-09-01 12:42:30,884 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:42:31,088 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:42:31,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-09-01 12:42:31,094 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9afec292f/b0588f87704d4d46b9ba0989eb5e403c/FLAG530faa9cc [2023-09-01 12:42:31,109 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9afec292f/b0588f87704d4d46b9ba0989eb5e403c [2023-09-01 12:42:31,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:42:31,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:42:31,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:42:31,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:42:31,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:42:31,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79bf46cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31, skipping insertion in model container [2023-09-01 12:42:31,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:42:31,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:42:31,295 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c[3057,3070] [2023-09-01 12:42:31,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:42:31,311 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:42:31,333 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/parallel-min-max-1.wvr.c[3057,3070] [2023-09-01 12:42:31,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:42:31,358 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:42:31,362 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:42:31,368 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:42:31,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31 WrapperNode [2023-09-01 12:42:31,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:42:31,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:42:31,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:42:31,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:42:31,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,424 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 129 [2023-09-01 12:42:31,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:42:31,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:42:31,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:42:31,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:42:31,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,480 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:42:31,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:42:31,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:42:31,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:42:31,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (1/1) ... [2023-09-01 12:42:31,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:42:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:42:31,538 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 12:42:31,568 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 12:42:31,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:42:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:42:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:42:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:42:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:42:31,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:42:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:42:31,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:42:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:42:31,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:42:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:42:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:42:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:42:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:42:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:42:31,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:42:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:42:31,590 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 12:42:31,741 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:42:31,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:42:32,015 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:42:32,119 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:42:32,119 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 12:42:32,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:42:32 BoogieIcfgContainer [2023-09-01 12:42:32,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:42:32,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:42:32,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:42:32,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:42:32,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:42:31" (1/3) ... [2023-09-01 12:42:32,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72acb30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:42:32, skipping insertion in model container [2023-09-01 12:42:32,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:31" (2/3) ... [2023-09-01 12:42:32,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72acb30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:42:32, skipping insertion in model container [2023-09-01 12:42:32,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:42:32" (3/3) ... [2023-09-01 12:42:32,157 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2023-09-01 12:42:32,164 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:42:32,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:42:32,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:42:32,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:42:32,309 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:42:32,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 169 transitions, 362 flow [2023-09-01 12:42:32,466 INFO L130 PetriNetUnfolder]: 12/166 cut-off events. [2023-09-01 12:42:32,466 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:42:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 12/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2023-09-01 12:42:32,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 169 transitions, 362 flow [2023-09-01 12:42:32,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 156 transitions, 330 flow [2023-09-01 12:42:32,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:42:32,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 156 transitions, 330 flow [2023-09-01 12:42:32,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 156 transitions, 330 flow [2023-09-01 12:42:32,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 330 flow [2023-09-01 12:42:32,559 INFO L130 PetriNetUnfolder]: 12/156 cut-off events. [2023-09-01 12:42:32,560 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:42:32,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 12/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2023-09-01 12:42:32,564 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2023-09-01 12:42:38,043 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2023-09-01 12:42:38,043 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-09-01 12:42:38,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:42:38,061 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;@60f8dcf2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:42:38,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:42:38,067 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-09-01 12:42:38,067 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:42:38,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:42:38,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:42:38,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:42:38,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:42:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1074919772, now seen corresponding path program 1 times [2023-09-01 12:42:38,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:42:38,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970553263] [2023-09-01 12:42:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:38,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:42:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:38,421 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 12:42:38,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:42:38,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970553263] [2023-09-01 12:42:38,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970553263] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:42:38,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:42:38,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:42:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329432659] [2023-09-01 12:42:38,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:42:38,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:42:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:42:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:42:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:42:38,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 331 [2023-09-01 12:42:38,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 12:42:38,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:42:38,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 331 [2023-09-01 12:42:38,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:42:38,618 INFO L130 PetriNetUnfolder]: 282/438 cut-off events. [2023-09-01 12:42:38,618 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-09-01 12:42:38,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 438 events. 282/438 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1311 event pairs, 173 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 800. Up to 356 conditions per place. [2023-09-01 12:42:38,626 INFO L137 encePairwiseOnDemand]: 327/331 looper letters, 32 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-09-01 12:42:38,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 164 flow [2023-09-01 12:42:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:42:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:42:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-09-01 12:42:38,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652567975830816 [2023-09-01 12:42:38,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-09-01 12:42:38,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-09-01 12:42:38,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:42:38,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-09-01 12:42:38,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 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 12:42:38,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 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 12:42:38,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 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 12:42:38,669 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 4 states and 616 transitions. [2023-09-01 12:42:38,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 164 flow [2023-09-01 12:42:38,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:42:38,676 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 68 flow [2023-09-01 12:42:38,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-09-01 12:42:38,681 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -2 predicate places. [2023-09-01 12:42:38,683 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 68 flow [2023-09-01 12:42:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 12:42:38,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:42:38,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:42:38,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:42:38,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:42:38,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:42:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash 725544040, now seen corresponding path program 1 times [2023-09-01 12:42:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:42:38,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420428321] [2023-09-01 12:42:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:42:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:38,835 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 12:42:38,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:42:38,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420428321] [2023-09-01 12:42:38,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420428321] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:42:38,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:42:38,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:42:38,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092962113] [2023-09-01 12:42:38,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:42:38,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:42:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:42:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:42:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:42:38,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 331 [2023-09-01 12:42:38,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 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 12:42:38,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:42:38,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 331 [2023-09-01 12:42:38,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:42:38,956 INFO L130 PetriNetUnfolder]: 344/532 cut-off events. [2023-09-01 12:42:38,956 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2023-09-01 12:42:38,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 532 events. 344/532 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1709 event pairs, 221 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 397. Up to 438 conditions per place. [2023-09-01 12:42:38,959 INFO L137 encePairwiseOnDemand]: 327/331 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-09-01 12:42:38,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 178 flow [2023-09-01 12:42:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:42:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:42:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-09-01 12:42:38,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652567975830816 [2023-09-01 12:42:38,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-09-01 12:42:38,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-09-01 12:42:38,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:42:38,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-09-01 12:42:38,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 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 12:42:38,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 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 12:42:38,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 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 12:42:38,967 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 4 states and 616 transitions. [2023-09-01 12:42:38,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 178 flow [2023-09-01 12:42:38,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 168 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:42:38,970 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 76 flow [2023-09-01 12:42:38,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-09-01 12:42:38,970 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-09-01 12:42:38,971 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 76 flow [2023-09-01 12:42:38,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 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 12:42:38,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:42:38,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:42:38,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:42:38,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:42:38,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:42:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash -512809655, now seen corresponding path program 1 times [2023-09-01 12:42:38,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:42:38,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133443900] [2023-09-01 12:42:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:38,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:42:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:42:39,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:42:39,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133443900] [2023-09-01 12:42:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133443900] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:42:39,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:42:39,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:42:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62607352] [2023-09-01 12:42:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:42:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:42:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:42:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:42:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:42:39,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 331 [2023-09-01 12:42:39,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 12:42:39,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:42:39,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 331 [2023-09-01 12:42:39,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:42:39,227 INFO L130 PetriNetUnfolder]: 344/533 cut-off events. [2023-09-01 12:42:39,227 INFO L131 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2023-09-01 12:42:39,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 533 events. 344/533 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1621 event pairs, 277 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 469. Up to 533 conditions per place. [2023-09-01 12:42:39,230 INFO L137 encePairwiseOnDemand]: 328/331 looper letters, 25 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-09-01 12:42:39,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 132 flow [2023-09-01 12:42:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:42:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:42:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-09-01 12:42:39,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46727089627391744 [2023-09-01 12:42:39,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-09-01 12:42:39,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-09-01 12:42:39,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:42:39,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-09-01 12:42:39,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 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 12:42:39,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:42:39,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:42:39,237 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 76 flow. Second operand 3 states and 464 transitions. [2023-09-01 12:42:39,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 132 flow [2023-09-01 12:42:39,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 126 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:42:39,239 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 82 flow [2023-09-01 12:42:39,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-09-01 12:42:39,241 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-09-01 12:42:39,243 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 82 flow [2023-09-01 12:42:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 12:42:39,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:42:39,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:42:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:42:39,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:42:39,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:42:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash -599166117, now seen corresponding path program 1 times [2023-09-01 12:42:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:42:39,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533316334] [2023-09-01 12:42:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:39,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:42:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:42:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:42:39,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533316334] [2023-09-01 12:42:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533316334] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:42:39,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211684284] [2023-09-01 12:42:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:39,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:42:39,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:42:39,801 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 12:42:39,833 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 12:42:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:42:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:42:39,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 12:42:40,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:42:40,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 61 [2023-09-01 12:42:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:42:40,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:42:40,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:42:40,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 65 [2023-09-01 12:42:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:42:40,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211684284] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:42:40,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:42:40,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:42:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204499712] [2023-09-01 12:42:40,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:42:40,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:42:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:42:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:42:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:42:40,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 331 [2023-09-01 12:42:40,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 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 12:42:40,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:42:40,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 331 [2023-09-01 12:42:40,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:42:42,066 INFO L130 PetriNetUnfolder]: 1268/1991 cut-off events. [2023-09-01 12:42:42,067 INFO L131 PetriNetUnfolder]: For 406/406 co-relation queries the response was YES. [2023-09-01 12:42:42,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 1991 events. 1268/1991 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9306 event pairs, 162 based on Foata normal form. 4/1699 useless extension candidates. Maximal degree in co-relation 4940. Up to 506 conditions per place. [2023-09-01 12:42:42,075 INFO L137 encePairwiseOnDemand]: 322/331 looper letters, 74 selfloop transitions, 14 changer transitions 124/212 dead transitions. [2023-09-01 12:42:42,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 212 transitions, 1043 flow [2023-09-01 12:42:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:42:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:42:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2803 transitions. [2023-09-01 12:42:42,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456988392431229 [2023-09-01 12:42:42,082 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2803 transitions. [2023-09-01 12:42:42,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2803 transitions. [2023-09-01 12:42:42,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:42:42,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2803 transitions. [2023-09-01 12:42:42,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.52631578947367) internal successors, (2803), 19 states have internal predecessors, (2803), 0 states have call successors, (0), 0 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 12:42:42,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 331.0) internal successors, (6620), 20 states have internal predecessors, (6620), 0 states have call successors, (0), 0 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 12:42:42,101 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 331.0) internal successors, (6620), 20 states have internal predecessors, (6620), 0 states have call successors, (0), 0 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 12:42:42,102 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 82 flow. Second operand 19 states and 2803 transitions. [2023-09-01 12:42:42,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 212 transitions, 1043 flow [2023-09-01 12:42:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 212 transitions, 1039 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:42:42,112 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 199 flow [2023-09-01 12:42:42,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=199, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2023-09-01 12:42:42,114 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2023-09-01 12:42:42,114 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 199 flow [2023-09-01 12:42:42,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 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 12:42:42,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:42:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:42:42,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 12:42:42,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:42:42,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:42:42,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:42:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1758554723, now seen corresponding path program 2 times [2023-09-01 12:42:42,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:42:42,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943324018] [2023-09-01 12:42:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:42,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:42:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:42:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:42:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943324018] [2023-09-01 12:42:42,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943324018] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:42:42,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:42:42,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:42:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486746546] [2023-09-01 12:42:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:42:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:42:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:42:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:42:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:42:42,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 331 [2023-09-01 12:42:42,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 12:42:42,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:42:42,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 331 [2023-09-01 12:42:42,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:42:43,293 INFO L130 PetriNetUnfolder]: 1073/1714 cut-off events. [2023-09-01 12:42:43,294 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 12:42:43,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6489 conditions, 1714 events. 1073/1714 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8071 event pairs, 132 based on Foata normal form. 4/1584 useless extension candidates. Maximal degree in co-relation 6457. Up to 602 conditions per place. [2023-09-01 12:42:43,302 INFO L137 encePairwiseOnDemand]: 325/331 looper letters, 46 selfloop transitions, 5 changer transitions 41/92 dead transitions. [2023-09-01 12:42:43,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 92 transitions, 633 flow [2023-09-01 12:42:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:42:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:42:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 964 transitions. [2023-09-01 12:42:43,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160552438498058 [2023-09-01 12:42:43,306 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 964 transitions. [2023-09-01 12:42:43,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 964 transitions. [2023-09-01 12:42:43,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:42:43,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 964 transitions. [2023-09-01 12:42:43,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.71428571428572) internal successors, (964), 7 states have internal predecessors, (964), 0 states have call successors, (0), 0 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 12:42:43,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 331.0) internal successors, (2648), 8 states have internal predecessors, (2648), 0 states have call successors, (0), 0 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 12:42:43,312 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 331.0) internal successors, (2648), 8 states have internal predecessors, (2648), 0 states have call successors, (0), 0 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 12:42:43,312 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 199 flow. Second operand 7 states and 964 transitions. [2023-09-01 12:42:43,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 92 transitions, 633 flow [2023-09-01 12:42:43,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 92 transitions, 589 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-09-01 12:42:43,331 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 173 flow [2023-09-01 12:42:43,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-09-01 12:42:43,332 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2023-09-01 12:42:43,332 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 173 flow [2023-09-01 12:42:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 12:42:43,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:42:43,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:42:43,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:42:43,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:42:43,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:42:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash -115692411, now seen corresponding path program 3 times [2023-09-01 12:42:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:42:43,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912580472] [2023-09-01 12:42:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:42:43,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:42:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:42:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:42:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:42:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912580472] [2023-09-01 12:42:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912580472] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:42:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689455712] [2023-09-01 12:42:43,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:42:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:42:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:42:43,821 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 12:42:43,851 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 12:42:43,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:42:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:42:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:42:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:42:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:42:44,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:42:44,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 12:42:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:42:44,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:42:44,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-09-01 12:42:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:42:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689455712] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:42:50,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:42:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 26 [2023-09-01 12:42:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379482697] [2023-09-01 12:42:50,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:42:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 12:42:50,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:42:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 12:42:50,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=598, Unknown=11, NotChecked=0, Total=756 [2023-09-01 12:42:52,669 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 12:42:54,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:42:56,875 WARN L539 Checker$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 12:42:59,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:43:01,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:43:03,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:43:05,177 WARN L539 Checker$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 12:43:07,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:43:09,303 WARN L539 Checker$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 12:43:11,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:43:13,319 WARN L539 Checker$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 12:43:13,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 331 [2023-09-01 12:43:13,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 173 flow. Second operand has 28 states, 28 states have (on average 112.57142857142857) internal successors, (3152), 28 states have internal predecessors, (3152), 0 states have call successors, (0), 0 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 12:43:13,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:13,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 331 [2023-09-01 12:43:13,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:15,176 INFO L130 PetriNetUnfolder]: 1727/2822 cut-off events. [2023-09-01 12:43:15,176 INFO L131 PetriNetUnfolder]: For 6136/6136 co-relation queries the response was YES. [2023-09-01 12:43:15,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9837 conditions, 2822 events. 1727/2822 cut-off events. For 6136/6136 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15210 event pairs, 111 based on Foata normal form. 4/2558 useless extension candidates. Maximal degree in co-relation 9806. Up to 775 conditions per place. [2023-09-01 12:43:15,189 INFO L137 encePairwiseOnDemand]: 320/331 looper letters, 103 selfloop transitions, 26 changer transitions 157/286 dead transitions. [2023-09-01 12:43:15,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 286 transitions, 1863 flow [2023-09-01 12:43:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 12:43:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 12:43:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3464 transitions. [2023-09-01 12:43:15,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36087092405458904 [2023-09-01 12:43:15,200 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3464 transitions. [2023-09-01 12:43:15,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3464 transitions. [2023-09-01 12:43:15,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:15,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3464 transitions. [2023-09-01 12:43:15,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 119.44827586206897) internal successors, (3464), 29 states have internal predecessors, (3464), 0 states have call successors, (0), 0 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 12:43:15,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 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 12:43:15,222 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 331.0) internal successors, (9930), 30 states have internal predecessors, (9930), 0 states have call successors, (0), 0 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 12:43:15,222 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 173 flow. Second operand 29 states and 3464 transitions. [2023-09-01 12:43:15,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 286 transitions, 1863 flow [2023-09-01 12:43:15,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 286 transitions, 1748 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-09-01 12:43:15,238 INFO L231 Difference]: Finished difference. Result has 93 places, 49 transitions, 401 flow [2023-09-01 12:43:15,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=401, PETRI_PLACES=93, PETRI_TRANSITIONS=49} [2023-09-01 12:43:15,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2023-09-01 12:43:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 49 transitions, 401 flow [2023-09-01 12:43:15,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 112.57142857142857) internal successors, (3152), 28 states have internal predecessors, (3152), 0 states have call successors, (0), 0 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 12:43:15,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:15,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:15,249 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 12:43:15,446 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,SelfDestructingSolverStorable5 [2023-09-01 12:43:15,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:43:15,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 157009709, now seen corresponding path program 4 times [2023-09-01 12:43:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883244581] [2023-09-01 12:43:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:43:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883244581] [2023-09-01 12:43:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883244581] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783441542] [2023-09-01 12:43:15,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:43:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:15,905 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 12:43:15,909 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 12:43:16,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:43:16,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:43:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 12:43:16,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:16,049 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:43:16,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 90 [2023-09-01 12:43:16,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 12:43:16,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:43:16,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:43:16,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:43:16,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 12:43:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:16,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:16,533 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (<= c_~min~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_225) c_~A~0.base) c_~A~0.offset))) is different from false [2023-09-01 12:43:18,564 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int)) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))) is different from false [2023-09-01 12:43:18,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:18,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2023-09-01 12:43:18,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 423 treesize of output 417 [2023-09-01 12:43:18,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 232 [2023-09-01 12:43:18,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 224 [2023-09-01 12:43:18,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 122 [2023-09-01 12:43:18,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2023-09-01 12:43:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 12:43:18,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783441542] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:18,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:18,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-09-01 12:43:18,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431641213] [2023-09-01 12:43:18,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:18,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 12:43:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 12:43:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=377, Unknown=4, NotChecked=82, Total=552 [2023-09-01 12:43:18,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 331 [2023-09-01 12:43:18,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 49 transitions, 401 flow. Second operand has 24 states, 24 states have (on average 106.95833333333333) internal successors, (2567), 24 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:18,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:18,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 331 [2023-09-01 12:43:18,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:21,877 INFO L130 PetriNetUnfolder]: 1469/2486 cut-off events. [2023-09-01 12:43:21,877 INFO L131 PetriNetUnfolder]: For 30865/30865 co-relation queries the response was YES. [2023-09-01 12:43:21,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14203 conditions, 2486 events. 1469/2486 cut-off events. For 30865/30865 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13193 event pairs, 152 based on Foata normal form. 14/2500 useless extension candidates. Maximal degree in co-relation 14167. Up to 771 conditions per place. [2023-09-01 12:43:21,892 INFO L137 encePairwiseOnDemand]: 323/331 looper letters, 0 selfloop transitions, 0 changer transitions 176/176 dead transitions. [2023-09-01 12:43:21,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 176 transitions, 1841 flow [2023-09-01 12:43:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:43:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:43:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1783 transitions. [2023-09-01 12:43:21,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33666918429003023 [2023-09-01 12:43:21,898 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1783 transitions. [2023-09-01 12:43:21,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1783 transitions. [2023-09-01 12:43:21,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:21,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1783 transitions. [2023-09-01 12:43:21,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 111.4375) internal successors, (1783), 16 states have internal predecessors, (1783), 0 states have call successors, (0), 0 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 12:43:21,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 0 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 12:43:21,910 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 0 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 12:43:21,910 INFO L175 Difference]: Start difference. First operand has 93 places, 49 transitions, 401 flow. Second operand 16 states and 1783 transitions. [2023-09-01 12:43:21,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 176 transitions, 1841 flow [2023-09-01 12:43:21,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 176 transitions, 1508 flow, removed 134 selfloop flow, removed 16 redundant places. [2023-09-01 12:43:21,958 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-09-01 12:43:21,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-09-01 12:43:21,959 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2023-09-01 12:43:21,959 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-09-01 12:43:21,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 106.95833333333333) internal successors, (2567), 24 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:21,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-09-01 12:43:21,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-09-01 12:43:21,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-09-01 12:43:21,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-09-01 12:43:21,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:43:22,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:22,172 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-09-01 12:43:22,174 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 12:43:22,174 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 12:43:22,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:43:22 BasicIcfg [2023-09-01 12:43:22,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 12:43:22,177 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 12:43:22,177 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 12:43:22,177 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 12:43:22,178 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:42:32" (3/4) ... [2023-09-01 12:43:22,180 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 12:43:22,184 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 12:43:22,184 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 12:43:22,185 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-09-01 12:43:22,191 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2023-09-01 12:43:22,192 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 12:43:22,192 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 12:43:22,192 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 12:43:22,233 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 12:43:22,233 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 12:43:22,234 INFO L158 Benchmark]: Toolchain (without parser) took 51121.19ms. Allocated memory was 67.1MB in the beginning and 174.1MB in the end (delta: 107.0MB). Free memory was 44.6MB in the beginning and 66.6MB in the end (delta: -22.0MB). Peak memory consumption was 87.7MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,234 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 44.0MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 12:43:22,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.54ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 32.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,234 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.87ms. Allocated memory is still 67.1MB. Free memory was 32.5MB in the beginning and 30.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,235 INFO L158 Benchmark]: Boogie Preprocessor took 63.54ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 30.5MB in the beginning and 61.0MB in the end (delta: -30.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,235 INFO L158 Benchmark]: RCFGBuilder took 632.07ms. Allocated memory is still 81.8MB. Free memory was 61.0MB in the beginning and 38.8MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,235 INFO L158 Benchmark]: TraceAbstraction took 50053.46ms. Allocated memory was 81.8MB in the beginning and 174.1MB in the end (delta: 92.3MB). Free memory was 38.3MB in the beginning and 69.7MB in the end (delta: -31.5MB). Peak memory consumption was 107.3MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,236 INFO L158 Benchmark]: Witness Printer took 56.45ms. Allocated memory is still 174.1MB. Free memory was 69.7MB in the beginning and 66.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 12:43:22,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 44.0MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.54ms. Allocated memory is still 67.1MB. Free memory was 44.2MB in the beginning and 32.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.87ms. Allocated memory is still 67.1MB. Free memory was 32.5MB in the beginning and 30.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.54ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 30.5MB in the beginning and 61.0MB in the end (delta: -30.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * RCFGBuilder took 632.07ms. Allocated memory is still 81.8MB. Free memory was 61.0MB in the beginning and 38.8MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 50053.46ms. Allocated memory was 81.8MB in the beginning and 174.1MB in the end (delta: 92.3MB). Free memory was 38.3MB in the beginning and 69.7MB in the end (delta: -31.5MB). Peak memory consumption was 107.3MB. Max. memory is 16.1GB. * Witness Printer took 56.45ms. Allocated memory is still 174.1MB. Free memory was 69.7MB in the beginning and 66.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 154 PlacesBefore, 31 PlacesAfterwards, 156 TransitionsBefore, 24 TransitionsAfterwards, 1134 CoEnabledTransitionPairs, 7 FixpointIterations, 94 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 29 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 162 TotalNumberOfCompositions, 1738 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1289, independent: 1233, independent conditional: 0, independent unconditional: 1233, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 600, independent: 582, independent conditional: 0, independent unconditional: 582, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1289, independent: 651, independent conditional: 0, independent unconditional: 651, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 600, unknown conditional: 0, unknown unconditional: 600] , Statistics on independence cache: Total cache size (in pairs): 58, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 115]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 187 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 49.8s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 30.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 1566 SdHoareTripleChecker+Valid, 25.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1446 mSDsluCounter, 1077 SdHoareTripleChecker+Invalid, 24.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 266 IncrementalHoareTripleChecker+Unchecked, 1050 mSDsCounter, 131 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3393 IncrementalHoareTripleChecker+Invalid, 3814 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 131 mSolverCounterUnsat, 27 mSDtfsCounter, 3393 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=401occurred in iteration=6, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 293 ConstructedInterpolants, 18 QuantifiedInterpolants, 2442 SizeOfPredicates, 46 NumberOfNonLiveVariables, 684 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 18/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 12:43:22,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE