./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/weaver/unroll-cond-2.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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:24:05,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:24:05,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:24:05,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:24:05,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:24:05,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:24:05,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:24:05,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:24:05,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:24:05,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:24:05,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:24:05,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:24:05,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:24:05,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:24:05,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:24:05,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:24:05,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:24:05,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:24:05,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:24:05,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:24:05,402 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:24:05,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:24:05,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:24:05,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:24:05,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:24:05,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:24:05,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:24:05,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:24:05,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:24:05,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:24:05,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:24:05,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:24:05,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:24:05,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:24:05,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:24:05,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:24:05,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:24:05,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:24:05,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:24:05,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:24:05,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:24:05,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:24:05,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:24:05,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:24:05,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:24:05,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:24:05,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:24:05,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:24:05,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:24:05,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:24:05,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:24:05,456 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:24:05,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:24:05,457 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:24:05,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:24:05,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:24:05,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:24:05,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:24:05,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:24:05,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:24:05,458 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:24:05,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:24:05,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:24:05,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:24:05,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:24:05,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:24:05,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:24:05,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:24:05,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:24:05,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:24:05,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:24:05,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:24:05,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:24:05,460 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:24:05,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:24:05,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:24:05,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2022-07-13 22:24:05,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:24:05,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:24:05,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:24:05,653 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:24:05,653 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:24:05,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-07-13 22:24:05,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9bd674a9/490517ed022045018926933897776db3/FLAG7108c653e [2022-07-13 22:24:06,040 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:24:06,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-07-13 22:24:06,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9bd674a9/490517ed022045018926933897776db3/FLAG7108c653e [2022-07-13 22:24:06,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9bd674a9/490517ed022045018926933897776db3 [2022-07-13 22:24:06,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:24:06,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:24:06,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:24:06,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:24:06,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:24:06,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787d9b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06, skipping insertion in model container [2022-07-13 22:24:06,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:24:06,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:24:06,251 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2022-07-13 22:24:06,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:24:06,261 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:24:06,280 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2022-07-13 22:24:06,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:24:06,290 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:24:06,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06 WrapperNode [2022-07-13 22:24:06,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:24:06,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:24:06,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:24:06,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:24:06,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,323 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2022-07-13 22:24:06,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:24:06,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:24:06,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:24:06,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:24:06,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:24:06,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:24:06,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:24:06,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:24:06,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (1/1) ... [2022-07-13 22:24:06,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:24:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:06,374 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) [2022-07-13 22:24:06,375 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 [2022-07-13 22:24:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:24:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:24:06,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:24:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:24:06,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:24:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:24:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:24:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:24:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:24:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:24:06,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:24:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:24:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:24:06,401 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:24:06,465 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:24:06,466 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:24:06,647 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:24:06,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:24:06,654 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:24:06,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:24:06 BoogieIcfgContainer [2022-07-13 22:24:06,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:24:06,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:24:06,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:24:06,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:24:06,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:24:06" (1/3) ... [2022-07-13 22:24:06,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66bc20d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:24:06, skipping insertion in model container [2022-07-13 22:24:06,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:24:06" (2/3) ... [2022-07-13 22:24:06,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66bc20d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:24:06, skipping insertion in model container [2022-07-13 22:24:06,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:24:06" (3/3) ... [2022-07-13 22:24:06,660 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2022-07-13 22:24:06,664 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:24:06,676 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:24:06,676 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:24:06,677 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:24:06,733 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:24:06,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2022-07-13 22:24:06,859 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2022-07-13 22:24:06,861 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:24:06,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-07-13 22:24:06,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2022-07-13 22:24:06,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2022-07-13 22:24:06,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:24:06,888 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31199aaf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7723e4d6 [2022-07-13 22:24:06,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:24:06,929 INFO L129 PetriNetUnfolder]: 14/165 cut-off events. [2022-07-13 22:24:06,929 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:24:06,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:06,930 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:06,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:06,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2050850175, now seen corresponding path program 1 times [2022-07-13 22:24:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185749340] [2022-07-13 22:24:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185749340] [2022-07-13 22:24:07,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185749340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:07,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:07,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:24:07,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243684354] [2022-07-13 22:24:07,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:07,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:24:07,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:24:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:24:07,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2022-07-13 22:24:07,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:07,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2022-07-13 22:24:07,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:07,221 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2022-07-13 22:24:07,221 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:24:07,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 202 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2022-07-13 22:24:07,223 INFO L132 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2022-07-13 22:24:07,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2022-07-13 22:24:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:24:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:24:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2022-07-13 22:24:07,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2022-07-13 22:24:07,234 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2022-07-13 22:24:07,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2022-07-13 22:24:07,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:07,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2022-07-13 22:24:07,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,246 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,247 INFO L186 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2022-07-13 22:24:07,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2022-07-13 22:24:07,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:24:07,255 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2022-07-13 22:24:07,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2022-07-13 22:24:07,258 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2022-07-13 22:24:07,259 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2022-07-13 22:24:07,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:07,260 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:24:07,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1248426905, now seen corresponding path program 1 times [2022-07-13 22:24:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:07,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510270960] [2022-07-13 22:24:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:07,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:07,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510270960] [2022-07-13 22:24:07,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510270960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:07,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:07,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:24:07,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841636468] [2022-07-13 22:24:07,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:07,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:24:07,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:24:07,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:24:07,405 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2022-07-13 22:24:07,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 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) [2022-07-13 22:24:07,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:07,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2022-07-13 22:24:07,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:07,495 INFO L129 PetriNetUnfolder]: 105/567 cut-off events. [2022-07-13 22:24:07,495 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-13 22:24:07,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 567 events. 105/567 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2597 event pairs, 29 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 753. Up to 111 conditions per place. [2022-07-13 22:24:07,501 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 30 selfloop transitions, 6 changer transitions 0/170 dead transitions. [2022-07-13 22:24:07,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 170 transitions, 418 flow [2022-07-13 22:24:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:24:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:24:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-07-13 22:24:07,505 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2022-07-13 22:24:07,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-07-13 22:24:07,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-07-13 22:24:07,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:07,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-07-13 22:24:07,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,510 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 4 states and 629 transitions. [2022-07-13 22:24:07,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 170 transitions, 418 flow [2022-07-13 22:24:07,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:24:07,516 INFO L242 Difference]: Finished difference. Result has 158 places, 158 transitions, 350 flow [2022-07-13 22:24:07,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=158, PETRI_TRANSITIONS=158} [2022-07-13 22:24:07,517 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, -2 predicate places. [2022-07-13 22:24:07,517 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 158 transitions, 350 flow [2022-07-13 22:24:07,518 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) [2022-07-13 22:24:07,518 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:07,518 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:07,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:24:07,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash -5255025, now seen corresponding path program 1 times [2022-07-13 22:24:07,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:07,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596250211] [2022-07-13 22:24:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:07,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:07,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596250211] [2022-07-13 22:24:07,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596250211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:07,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:07,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:24:07,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248828268] [2022-07-13 22:24:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:07,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:24:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:24:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:24:07,670 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-13 22:24:07,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 158 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:07,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-13 22:24:07,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:07,897 INFO L129 PetriNetUnfolder]: 236/1284 cut-off events. [2022-07-13 22:24:07,898 INFO L130 PetriNetUnfolder]: For 130/132 co-relation queries the response was YES. [2022-07-13 22:24:07,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1284 events. 236/1284 cut-off events. For 130/132 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 8717 event pairs, 108 based on Foata normal form. 6/1205 useless extension candidates. Maximal degree in co-relation 1934. Up to 256 conditions per place. [2022-07-13 22:24:07,903 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 60 selfloop transitions, 7 changer transitions 1/199 dead transitions. [2022-07-13 22:24:07,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 199 transitions, 627 flow [2022-07-13 22:24:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:24:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:24:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2022-07-13 22:24:07,906 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2022-07-13 22:24:07,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2022-07-13 22:24:07,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2022-07-13 22:24:07,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:07,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2022-07-13 22:24:07,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,912 INFO L186 Difference]: Start difference. First operand has 158 places, 158 transitions, 350 flow. Second operand 6 states and 927 transitions. [2022-07-13 22:24:07,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 199 transitions, 627 flow [2022-07-13 22:24:07,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 199 transitions, 627 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:24:07,918 INFO L242 Difference]: Finished difference. Result has 166 places, 162 transitions, 398 flow [2022-07-13 22:24:07,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-07-13 22:24:07,920 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 6 predicate places. [2022-07-13 22:24:07,921 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 398 flow [2022-07-13 22:24:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:07,921 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:07,921 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:07,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:24:07,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1123750283, now seen corresponding path program 2 times [2022-07-13 22:24:07,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:07,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896843953] [2022-07-13 22:24:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:08,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:08,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896843953] [2022-07-13 22:24:08,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896843953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:08,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:08,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:24:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46781872] [2022-07-13 22:24:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:08,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:24:08,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:24:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:24:08,089 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-13 22:24:08,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 398 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:08,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-13 22:24:08,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:08,261 INFO L129 PetriNetUnfolder]: 264/1409 cut-off events. [2022-07-13 22:24:08,261 INFO L130 PetriNetUnfolder]: For 392/404 co-relation queries the response was YES. [2022-07-13 22:24:08,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1409 events. 264/1409 cut-off events. For 392/404 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 9977 event pairs, 114 based on Foata normal form. 4/1316 useless extension candidates. Maximal degree in co-relation 2365. Up to 263 conditions per place. [2022-07-13 22:24:08,268 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 59 selfloop transitions, 12 changer transitions 1/203 dead transitions. [2022-07-13 22:24:08,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 203 transitions, 704 flow [2022-07-13 22:24:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:24:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:24:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 786 transitions. [2022-07-13 22:24:08,271 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782122905027933 [2022-07-13 22:24:08,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 786 transitions. [2022-07-13 22:24:08,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 786 transitions. [2022-07-13 22:24:08,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:08,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 786 transitions. [2022-07-13 22:24:08,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,275 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,275 INFO L186 Difference]: Start difference. First operand has 166 places, 162 transitions, 398 flow. Second operand 5 states and 786 transitions. [2022-07-13 22:24:08,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 203 transitions, 704 flow [2022-07-13 22:24:08,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 203 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:24:08,279 INFO L242 Difference]: Finished difference. Result has 171 places, 170 transitions, 496 flow [2022-07-13 22:24:08,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2022-07-13 22:24:08,280 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 11 predicate places. [2022-07-13 22:24:08,280 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 496 flow [2022-07-13 22:24:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,281 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:08,281 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:08,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:24:08,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 561552515, now seen corresponding path program 3 times [2022-07-13 22:24:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:08,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621100261] [2022-07-13 22:24:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:08,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:08,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621100261] [2022-07-13 22:24:08,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621100261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:08,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:08,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:24:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351473310] [2022-07-13 22:24:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:24:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:24:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:24:08,372 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-13 22:24:08,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:08,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-13 22:24:08,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:08,547 INFO L129 PetriNetUnfolder]: 268/1401 cut-off events. [2022-07-13 22:24:08,547 INFO L130 PetriNetUnfolder]: For 760/768 co-relation queries the response was YES. [2022-07-13 22:24:08,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1401 events. 268/1401 cut-off events. For 760/768 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9855 event pairs, 101 based on Foata normal form. 6/1312 useless extension candidates. Maximal degree in co-relation 2532. Up to 263 conditions per place. [2022-07-13 22:24:08,554 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 17 changer transitions 1/218 dead transitions. [2022-07-13 22:24:08,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 218 transitions, 872 flow [2022-07-13 22:24:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:24:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:24:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2022-07-13 22:24:08,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8770949720670391 [2022-07-13 22:24:08,556 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2022-07-13 22:24:08,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2022-07-13 22:24:08,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:08,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2022-07-13 22:24:08,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,560 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,560 INFO L186 Difference]: Start difference. First operand has 171 places, 170 transitions, 496 flow. Second operand 6 states and 942 transitions. [2022-07-13 22:24:08,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 218 transitions, 872 flow [2022-07-13 22:24:08,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 218 transitions, 860 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-13 22:24:08,565 INFO L242 Difference]: Finished difference. Result has 178 places, 176 transitions, 604 flow [2022-07-13 22:24:08,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=178, PETRI_TRANSITIONS=176} [2022-07-13 22:24:08,566 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 18 predicate places. [2022-07-13 22:24:08,566 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 604 flow [2022-07-13 22:24:08,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:08,567 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:24:08,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash -571169239, now seen corresponding path program 4 times [2022-07-13 22:24:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127470925] [2022-07-13 22:24:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:08,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:08,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127470925] [2022-07-13 22:24:08,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127470925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:08,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:08,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:24:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529028450] [2022-07-13 22:24:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:24:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:24:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:24:08,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-13 22:24:08,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 176 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:08,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-13 22:24:08,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:08,882 INFO L129 PetriNetUnfolder]: 274/1480 cut-off events. [2022-07-13 22:24:08,882 INFO L130 PetriNetUnfolder]: For 1256/1258 co-relation queries the response was YES. [2022-07-13 22:24:08,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2852 conditions, 1480 events. 274/1480 cut-off events. For 1256/1258 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 10598 event pairs, 100 based on Foata normal form. 6/1387 useless extension candidates. Maximal degree in co-relation 2836. Up to 292 conditions per place. [2022-07-13 22:24:08,890 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 23 changer transitions 1/218 dead transitions. [2022-07-13 22:24:08,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 1002 flow [2022-07-13 22:24:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:24:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:24:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2022-07-13 22:24:08,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2022-07-13 22:24:08,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2022-07-13 22:24:08,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2022-07-13 22:24:08,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:08,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2022-07-13 22:24:08,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,897 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,897 INFO L186 Difference]: Start difference. First operand has 178 places, 176 transitions, 604 flow. Second operand 7 states and 1076 transitions. [2022-07-13 22:24:08,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 1002 flow [2022-07-13 22:24:08,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 218 transitions, 975 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:24:08,904 INFO L242 Difference]: Finished difference. Result has 186 places, 181 transitions, 699 flow [2022-07-13 22:24:08,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=699, PETRI_PLACES=186, PETRI_TRANSITIONS=181} [2022-07-13 22:24:08,906 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 26 predicate places. [2022-07-13 22:24:08,906 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 181 transitions, 699 flow [2022-07-13 22:24:08,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:08,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:08,906 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:24:08,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -831138031, now seen corresponding path program 5 times [2022-07-13 22:24:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516610302] [2022-07-13 22:24:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516610302] [2022-07-13 22:24:09,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516610302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:09,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:09,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:24:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336826151] [2022-07-13 22:24:09,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:09,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:24:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:24:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:24:09,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-13 22:24:09,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 181 transitions, 699 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:09,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-13 22:24:09,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:09,223 INFO L129 PetriNetUnfolder]: 274/1433 cut-off events. [2022-07-13 22:24:09,223 INFO L130 PetriNetUnfolder]: For 1948/1948 co-relation queries the response was YES. [2022-07-13 22:24:09,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 1433 events. 274/1433 cut-off events. For 1948/1948 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10116 event pairs, 102 based on Foata normal form. 3/1337 useless extension candidates. Maximal degree in co-relation 2959. Up to 207 conditions per place. [2022-07-13 22:24:09,231 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 71 selfloop transitions, 30 changer transitions 1/233 dead transitions. [2022-07-13 22:24:09,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 1184 flow [2022-07-13 22:24:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:24:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:24:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2022-07-13 22:24:09,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2022-07-13 22:24:09,234 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2022-07-13 22:24:09,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2022-07-13 22:24:09,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:09,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2022-07-13 22:24:09,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,238 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,239 INFO L186 Difference]: Start difference. First operand has 186 places, 181 transitions, 699 flow. Second operand 8 states and 1235 transitions. [2022-07-13 22:24:09,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 1184 flow [2022-07-13 22:24:09,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 1138 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-13 22:24:09,246 INFO L242 Difference]: Finished difference. Result has 193 places, 189 transitions, 825 flow [2022-07-13 22:24:09,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=193, PETRI_TRANSITIONS=189} [2022-07-13 22:24:09,247 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 33 predicate places. [2022-07-13 22:24:09,247 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 189 transitions, 825 flow [2022-07-13 22:24:09,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:09,248 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:09,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:24:09,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2068674478, now seen corresponding path program 1 times [2022-07-13 22:24:09,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837419431] [2022-07-13 22:24:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:09,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:09,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837419431] [2022-07-13 22:24:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837419431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:24:09,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:24:09,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:24:09,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94788913] [2022-07-13 22:24:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:09,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:24:09,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:24:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:24:09,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 179 [2022-07-13 22:24:09,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 189 transitions, 825 flow. Second operand has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:09,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 179 [2022-07-13 22:24:09,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:09,486 INFO L129 PetriNetUnfolder]: 108/1092 cut-off events. [2022-07-13 22:24:09,487 INFO L130 PetriNetUnfolder]: For 1018/1051 co-relation queries the response was YES. [2022-07-13 22:24:09,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 1092 events. 108/1092 cut-off events. For 1018/1051 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7584 event pairs, 35 based on Foata normal form. 9/1023 useless extension candidates. Maximal degree in co-relation 1842. Up to 145 conditions per place. [2022-07-13 22:24:09,493 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 33 selfloop transitions, 7 changer transitions 0/193 dead transitions. [2022-07-13 22:24:09,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 193 transitions, 913 flow [2022-07-13 22:24:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:24:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:24:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2022-07-13 22:24:09,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7381284916201117 [2022-07-13 22:24:09,496 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2022-07-13 22:24:09,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2022-07-13 22:24:09,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:09,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2022-07-13 22:24:09,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,501 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,501 INFO L186 Difference]: Start difference. First operand has 193 places, 189 transitions, 825 flow. Second operand 8 states and 1057 transitions. [2022-07-13 22:24:09,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 193 transitions, 913 flow [2022-07-13 22:24:09,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 193 transitions, 881 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-13 22:24:09,507 INFO L242 Difference]: Finished difference. Result has 198 places, 190 transitions, 815 flow [2022-07-13 22:24:09,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=815, PETRI_PLACES=198, PETRI_TRANSITIONS=190} [2022-07-13 22:24:09,509 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 38 predicate places. [2022-07-13 22:24:09,510 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 190 transitions, 815 flow [2022-07-13 22:24:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:09,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:09,510 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:24:09,511 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -721032061, now seen corresponding path program 1 times [2022-07-13 22:24:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:09,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898778396] [2022-07-13 22:24:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:09,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:09,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898778396] [2022-07-13 22:24:09,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898778396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:09,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098251375] [2022-07-13 22:24:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:09,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:09,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:09,704 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) [2022-07-13 22:24:09,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:24:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 22:24:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:10,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:10,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:10,211 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:10,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:24:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:24:10,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098251375] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:10,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:24:10,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-07-13 22:24:10,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200063464] [2022-07-13 22:24:10,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:24:10,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:24:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:24:10,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-13 22:24:10,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 190 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:10,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:10,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-13 22:24:10,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:10,803 INFO L129 PetriNetUnfolder]: 1161/4104 cut-off events. [2022-07-13 22:24:10,803 INFO L130 PetriNetUnfolder]: For 2401/2464 co-relation queries the response was YES. [2022-07-13 22:24:10,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 4104 events. 1161/4104 cut-off events. For 2401/2464 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 36225 event pairs, 340 based on Foata normal form. 22/3877 useless extension candidates. Maximal degree in co-relation 7526. Up to 998 conditions per place. [2022-07-13 22:24:10,826 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 90 selfloop transitions, 18 changer transitions 4/257 dead transitions. [2022-07-13 22:24:10,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 257 transitions, 1179 flow [2022-07-13 22:24:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 22:24:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 22:24:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1647 transitions. [2022-07-13 22:24:10,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7077782552642888 [2022-07-13 22:24:10,830 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1647 transitions. [2022-07-13 22:24:10,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1647 transitions. [2022-07-13 22:24:10,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:10,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1647 transitions. [2022-07-13 22:24:10,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.6923076923077) internal successors, (1647), 13 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:10,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:10,837 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:10,837 INFO L186 Difference]: Start difference. First operand has 198 places, 190 transitions, 815 flow. Second operand 13 states and 1647 transitions. [2022-07-13 22:24:10,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 257 transitions, 1179 flow [2022-07-13 22:24:10,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 257 transitions, 1167 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:24:10,848 INFO L242 Difference]: Finished difference. Result has 213 places, 206 transitions, 917 flow [2022-07-13 22:24:10,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=917, PETRI_PLACES=213, PETRI_TRANSITIONS=206} [2022-07-13 22:24:10,849 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 53 predicate places. [2022-07-13 22:24:10,850 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 206 transitions, 917 flow [2022-07-13 22:24:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:10,851 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:10,851 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:10,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:11,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:11,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash -278354083, now seen corresponding path program 1 times [2022-07-13 22:24:11,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56045715] [2022-07-13 22:24:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56045715] [2022-07-13 22:24:11,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56045715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838289155] [2022-07-13 22:24:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:11,195 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) [2022-07-13 22:24:11,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:24:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 22:24:11,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:11,858 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-13 22:24:11,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2022-07-13 22:24:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:11,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:12,143 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:12,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-13 22:24:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:13,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838289155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:13,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:13,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2022-07-13 22:24:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572521491] [2022-07-13 22:24:13,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 22:24:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 22:24:13,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 22:24:13,136 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2022-07-13 22:24:13,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 206 transitions, 917 flow. Second operand has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:13,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:13,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2022-07-13 22:24:13,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:18,945 INFO L129 PetriNetUnfolder]: 6270/13936 cut-off events. [2022-07-13 22:24:18,945 INFO L130 PetriNetUnfolder]: For 22916/22944 co-relation queries the response was YES. [2022-07-13 22:24:18,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36233 conditions, 13936 events. 6270/13936 cut-off events. For 22916/22944 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 129940 event pairs, 505 based on Foata normal form. 23/13268 useless extension candidates. Maximal degree in co-relation 36201. Up to 3004 conditions per place. [2022-07-13 22:24:19,041 INFO L132 encePairwiseOnDemand]: 133/179 looper letters, 515 selfloop transitions, 112 changer transitions 284/978 dead transitions. [2022-07-13 22:24:19,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 978 transitions, 5891 flow [2022-07-13 22:24:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-13 22:24:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-13 22:24:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7546 transitions. [2022-07-13 22:24:19,054 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.46325741297808337 [2022-07-13 22:24:19,054 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7546 transitions. [2022-07-13 22:24:19,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7546 transitions. [2022-07-13 22:24:19,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:19,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7546 transitions. [2022-07-13 22:24:19,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 82.92307692307692) internal successors, (7546), 91 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:19,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:19,097 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:19,097 INFO L186 Difference]: Start difference. First operand has 213 places, 206 transitions, 917 flow. Second operand 91 states and 7546 transitions. [2022-07-13 22:24:19,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 978 transitions, 5891 flow [2022-07-13 22:24:19,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 978 transitions, 5881 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-13 22:24:19,161 INFO L242 Difference]: Finished difference. Result has 353 places, 283 transitions, 1794 flow [2022-07-13 22:24:19,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1794, PETRI_PLACES=353, PETRI_TRANSITIONS=283} [2022-07-13 22:24:19,163 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 193 predicate places. [2022-07-13 22:24:19,163 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 283 transitions, 1794 flow [2022-07-13 22:24:19,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:19,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:19,164 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:19,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:19,382 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,SelfDestructingSolverStorable9 [2022-07-13 22:24:19,382 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1230727617, now seen corresponding path program 2 times [2022-07-13 22:24:19,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:19,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421874729] [2022-07-13 22:24:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:19,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421874729] [2022-07-13 22:24:19,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421874729] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047988617] [2022-07-13 22:24:19,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:24:19,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:19,563 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) [2022-07-13 22:24:19,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:24:19,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:24:19,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:19,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 22:24:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:19,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:19,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:19,942 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:19,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:24:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:24:20,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047988617] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:20,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:24:20,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-07-13 22:24:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347247325] [2022-07-13 22:24:20,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:20,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:24:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:24:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-07-13 22:24:20,056 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-13 22:24:20,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 283 transitions, 1794 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:20,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:20,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-13 22:24:20,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:21,189 INFO L129 PetriNetUnfolder]: 1913/6501 cut-off events. [2022-07-13 22:24:21,189 INFO L130 PetriNetUnfolder]: For 18173/18594 co-relation queries the response was YES. [2022-07-13 22:24:21,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19543 conditions, 6501 events. 1913/6501 cut-off events. For 18173/18594 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 63645 event pairs, 342 based on Foata normal form. 42/6314 useless extension candidates. Maximal degree in co-relation 19458. Up to 1115 conditions per place. [2022-07-13 22:24:21,259 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 130 selfloop transitions, 64 changer transitions 9/395 dead transitions. [2022-07-13 22:24:21,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 395 transitions, 2731 flow [2022-07-13 22:24:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:24:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:24:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2022-07-13 22:24:21,262 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2022-07-13 22:24:21,262 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2022-07-13 22:24:21,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2022-07-13 22:24:21,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:21,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2022-07-13 22:24:21,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:21,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:21,267 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:21,267 INFO L186 Difference]: Start difference. First operand has 353 places, 283 transitions, 1794 flow. Second operand 15 states and 1926 transitions. [2022-07-13 22:24:21,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 395 transitions, 2731 flow [2022-07-13 22:24:21,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 395 transitions, 2481 flow, removed 98 selfloop flow, removed 35 redundant places. [2022-07-13 22:24:21,335 INFO L242 Difference]: Finished difference. Result has 295 places, 318 transitions, 2031 flow [2022-07-13 22:24:21,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2031, PETRI_PLACES=295, PETRI_TRANSITIONS=318} [2022-07-13 22:24:21,336 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 135 predicate places. [2022-07-13 22:24:21,337 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 318 transitions, 2031 flow [2022-07-13 22:24:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:21,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:21,337 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:21,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:21,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:21,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1485343311, now seen corresponding path program 3 times [2022-07-13 22:24:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:21,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057146432] [2022-07-13 22:24:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:21,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:21,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:21,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057146432] [2022-07-13 22:24:21,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057146432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:21,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369353221] [2022-07-13 22:24:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:24:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:21,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:21,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:24:21,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:24:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 22:24:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:22,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:22,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:22,154 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:22,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:24:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:24:22,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369353221] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:22,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:24:22,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-07-13 22:24:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614598619] [2022-07-13 22:24:22,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:22,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:24:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:24:22,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:24:22,238 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-13 22:24:22,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 318 transitions, 2031 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:22,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:22,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-13 22:24:22,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:23,244 INFO L129 PetriNetUnfolder]: 2036/6945 cut-off events. [2022-07-13 22:24:23,245 INFO L130 PetriNetUnfolder]: For 15185/15440 co-relation queries the response was YES. [2022-07-13 22:24:23,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 6945 events. 2036/6945 cut-off events. For 15185/15440 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 69067 event pairs, 444 based on Foata normal form. 51/6730 useless extension candidates. Maximal degree in co-relation 20997. Up to 1614 conditions per place. [2022-07-13 22:24:23,300 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 133 selfloop transitions, 66 changer transitions 4/395 dead transitions. [2022-07-13 22:24:23,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 395 transitions, 2847 flow [2022-07-13 22:24:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:24:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:24:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2022-07-13 22:24:23,303 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2022-07-13 22:24:23,303 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2022-07-13 22:24:23,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2022-07-13 22:24:23,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:23,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2022-07-13 22:24:23,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:23,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:23,380 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:23,380 INFO L186 Difference]: Start difference. First operand has 295 places, 318 transitions, 2031 flow. Second operand 15 states and 1899 transitions. [2022-07-13 22:24:23,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 395 transitions, 2847 flow [2022-07-13 22:24:23,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 395 transitions, 2746 flow, removed 43 selfloop flow, removed 3 redundant places. [2022-07-13 22:24:23,503 INFO L242 Difference]: Finished difference. Result has 311 places, 341 transitions, 2331 flow [2022-07-13 22:24:23,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2331, PETRI_PLACES=311, PETRI_TRANSITIONS=341} [2022-07-13 22:24:23,522 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 151 predicate places. [2022-07-13 22:24:23,522 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 341 transitions, 2331 flow [2022-07-13 22:24:23,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:23,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:23,523 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:23,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:23,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:23,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:23,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1461858045, now seen corresponding path program 4 times [2022-07-13 22:24:23,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:23,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244913655] [2022-07-13 22:24:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:23,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:23,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244913655] [2022-07-13 22:24:23,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244913655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:23,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994059607] [2022-07-13 22:24:23,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:24:23,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:23,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:23,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:24:23,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:24:23,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 22:24:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:24,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 22:24:24,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:24,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:24,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:24,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:24,845 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:24,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-13 22:24:24,852 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:24,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 85 [2022-07-13 22:24:24,856 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:24:24,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 78 treesize of output 54 [2022-07-13 22:24:24,861 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:24:24,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 20 [2022-07-13 22:24:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:24,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994059607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:24,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:24,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2022-07-13 22:24:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535635850] [2022-07-13 22:24:24,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 22:24:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 22:24:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=674, Unknown=46, NotChecked=0, Total=930 [2022-07-13 22:24:24,936 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-07-13 22:24:24,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 341 transitions, 2331 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:24,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:24,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-07-13 22:24:24,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:26,506 INFO L129 PetriNetUnfolder]: 2155/7266 cut-off events. [2022-07-13 22:24:26,506 INFO L130 PetriNetUnfolder]: For 18546/18807 co-relation queries the response was YES. [2022-07-13 22:24:26,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 7266 events. 2155/7266 cut-off events. For 18546/18807 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 72920 event pairs, 445 based on Foata normal form. 50/7054 useless extension candidates. Maximal degree in co-relation 22951. Up to 1637 conditions per place. [2022-07-13 22:24:26,590 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 168 selfloop transitions, 102 changer transitions 4/444 dead transitions. [2022-07-13 22:24:26,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 444 transitions, 3497 flow [2022-07-13 22:24:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 22:24:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-13 22:24:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3183 transitions. [2022-07-13 22:24:26,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5736168679041269 [2022-07-13 22:24:26,595 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3183 transitions. [2022-07-13 22:24:26,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3183 transitions. [2022-07-13 22:24:26,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:26,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3183 transitions. [2022-07-13 22:24:26,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 102.6774193548387) internal successors, (3183), 31 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:26,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:26,603 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:26,603 INFO L186 Difference]: Start difference. First operand has 311 places, 341 transitions, 2331 flow. Second operand 31 states and 3183 transitions. [2022-07-13 22:24:26,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 444 transitions, 3497 flow [2022-07-13 22:24:26,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 444 transitions, 3379 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-07-13 22:24:26,726 INFO L242 Difference]: Finished difference. Result has 343 places, 378 transitions, 2903 flow [2022-07-13 22:24:26,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2903, PETRI_PLACES=343, PETRI_TRANSITIONS=378} [2022-07-13 22:24:26,727 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 183 predicate places. [2022-07-13 22:24:26,727 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 378 transitions, 2903 flow [2022-07-13 22:24:26,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:26,728 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:26,728 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:26,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:26,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 22:24:26,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash -539667915, now seen corresponding path program 5 times [2022-07-13 22:24:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:26,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261986187] [2022-07-13 22:24:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:26,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261986187] [2022-07-13 22:24:27,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261986187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120030571] [2022-07-13 22:24:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:24:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:27,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:24:27,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:24:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 22:24:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:27,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 22:24:27,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:27,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:27,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:27,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:28,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:28,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-13 22:24:28,032 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:28,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 85 [2022-07-13 22:24:28,037 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:24:28,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 78 treesize of output 54 [2022-07-13 22:24:28,042 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:24:28,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 20 [2022-07-13 22:24:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:28,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120030571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:28,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:28,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2022-07-13 22:24:28,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962658581] [2022-07-13 22:24:28,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:28,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 22:24:28,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 22:24:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=671, Unknown=49, NotChecked=0, Total=930 [2022-07-13 22:24:28,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-07-13 22:24:28,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 378 transitions, 2903 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:28,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:28,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-07-13 22:24:28,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:29,672 INFO L129 PetriNetUnfolder]: 2174/7381 cut-off events. [2022-07-13 22:24:29,672 INFO L130 PetriNetUnfolder]: For 22812/23134 co-relation queries the response was YES. [2022-07-13 22:24:29,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24821 conditions, 7381 events. 2174/7381 cut-off events. For 22812/23134 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 74601 event pairs, 460 based on Foata normal form. 58/7161 useless extension candidates. Maximal degree in co-relation 24741. Up to 1718 conditions per place. [2022-07-13 22:24:29,741 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 174 selfloop transitions, 96 changer transitions 4/444 dead transitions. [2022-07-13 22:24:29,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 444 transitions, 3787 flow [2022-07-13 22:24:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 22:24:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-13 22:24:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2971 transitions. [2022-07-13 22:24:29,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5723367366596032 [2022-07-13 22:24:29,745 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2971 transitions. [2022-07-13 22:24:29,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2971 transitions. [2022-07-13 22:24:29,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:29,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2971 transitions. [2022-07-13 22:24:29,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.44827586206897) internal successors, (2971), 29 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:29,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:29,755 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:29,755 INFO L186 Difference]: Start difference. First operand has 343 places, 378 transitions, 2903 flow. Second operand 29 states and 2971 transitions. [2022-07-13 22:24:29,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 444 transitions, 3787 flow [2022-07-13 22:24:29,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 3499 flow, removed 116 selfloop flow, removed 13 redundant places. [2022-07-13 22:24:29,881 INFO L242 Difference]: Finished difference. Result has 360 places, 385 transitions, 2929 flow [2022-07-13 22:24:29,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2929, PETRI_PLACES=360, PETRI_TRANSITIONS=385} [2022-07-13 22:24:29,882 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 200 predicate places. [2022-07-13 22:24:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 385 transitions, 2929 flow [2022-07-13 22:24:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:29,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:29,883 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:29,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 22:24:30,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:30,100 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash -729450221, now seen corresponding path program 6 times [2022-07-13 22:24:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:30,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228674615] [2022-07-13 22:24:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:30,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:30,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228674615] [2022-07-13 22:24:30,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228674615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:30,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071979490] [2022-07-13 22:24:30,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:24:30,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:30,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:30,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:30,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:24:30,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-13 22:24:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:30,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 22:24:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:30,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:30,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:30,593 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:30,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:24:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:24:30,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071979490] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:30,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:24:30,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-07-13 22:24:30,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784671933] [2022-07-13 22:24:30,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:24:30,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:24:30,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:24:30,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:24:30,666 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-13 22:24:30,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 385 transitions, 2929 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:30,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:30,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-13 22:24:30,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:31,990 INFO L129 PetriNetUnfolder]: 2208/7622 cut-off events. [2022-07-13 22:24:31,990 INFO L130 PetriNetUnfolder]: For 25463/25771 co-relation queries the response was YES. [2022-07-13 22:24:32,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25694 conditions, 7622 events. 2208/7622 cut-off events. For 25463/25771 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 78191 event pairs, 470 based on Foata normal form. 60/7402 useless extension candidates. Maximal degree in co-relation 25611. Up to 1922 conditions per place. [2022-07-13 22:24:32,057 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 171 selfloop transitions, 70 changer transitions 5/438 dead transitions. [2022-07-13 22:24:32,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 438 transitions, 3675 flow [2022-07-13 22:24:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 22:24:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 22:24:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2022-07-13 22:24:32,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2022-07-13 22:24:32,066 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2022-07-13 22:24:32,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2022-07-13 22:24:32,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:32,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2022-07-13 22:24:32,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:32,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:32,076 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:32,076 INFO L186 Difference]: Start difference. First operand has 360 places, 385 transitions, 2929 flow. Second operand 18 states and 2250 transitions. [2022-07-13 22:24:32,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 438 transitions, 3675 flow [2022-07-13 22:24:32,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 438 transitions, 3511 flow, removed 27 selfloop flow, removed 20 redundant places. [2022-07-13 22:24:32,181 INFO L242 Difference]: Finished difference. Result has 358 places, 389 transitions, 2970 flow [2022-07-13 22:24:32,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2970, PETRI_PLACES=358, PETRI_TRANSITIONS=389} [2022-07-13 22:24:32,182 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 198 predicate places. [2022-07-13 22:24:32,182 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 389 transitions, 2970 flow [2022-07-13 22:24:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:32,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:32,182 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:32,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 22:24:32,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:32,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1124290073, now seen corresponding path program 7 times [2022-07-13 22:24:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:32,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637966380] [2022-07-13 22:24:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637966380] [2022-07-13 22:24:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637966380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978834195] [2022-07-13 22:24:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:24:32,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:32,572 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:32,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:24:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 22:24:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:32,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:32,743 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:24:32,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:24:32,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2022-07-13 22:24:32,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:32,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:33,054 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_282 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_282) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-13 22:24:33,066 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:33,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2022-07-13 22:24:33,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2022-07-13 22:24:33,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-07-13 22:24:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:33,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978834195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:33,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:33,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2022-07-13 22:24:33,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569794248] [2022-07-13 22:24:33,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:33,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 22:24:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 22:24:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2022-07-13 22:24:33,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2022-07-13 22:24:33,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 389 transitions, 2970 flow. Second operand has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:33,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:33,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2022-07-13 22:24:33,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:35,178 INFO L129 PetriNetUnfolder]: 2521/8565 cut-off events. [2022-07-13 22:24:35,178 INFO L130 PetriNetUnfolder]: For 31700/32097 co-relation queries the response was YES. [2022-07-13 22:24:35,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29794 conditions, 8565 events. 2521/8565 cut-off events. For 31700/32097 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 90009 event pairs, 482 based on Foata normal form. 59/8306 useless extension candidates. Maximal degree in co-relation 29709. Up to 1687 conditions per place. [2022-07-13 22:24:35,291 INFO L132 encePairwiseOnDemand]: 153/179 looper letters, 191 selfloop transitions, 131 changer transitions 9/509 dead transitions. [2022-07-13 22:24:35,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 509 transitions, 4574 flow [2022-07-13 22:24:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:24:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 22:24:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2601 transitions. [2022-07-13 22:24:35,294 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6054469273743017 [2022-07-13 22:24:35,294 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2601 transitions. [2022-07-13 22:24:35,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2601 transitions. [2022-07-13 22:24:35,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:35,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2601 transitions. [2022-07-13 22:24:35,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.375) internal successors, (2601), 24 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:35,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:35,300 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:35,300 INFO L186 Difference]: Start difference. First operand has 358 places, 389 transitions, 2970 flow. Second operand 24 states and 2601 transitions. [2022-07-13 22:24:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 509 transitions, 4574 flow [2022-07-13 22:24:35,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 509 transitions, 4328 flow, removed 30 selfloop flow, removed 14 redundant places. [2022-07-13 22:24:35,598 INFO L242 Difference]: Finished difference. Result has 375 places, 436 transitions, 3726 flow [2022-07-13 22:24:35,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3726, PETRI_PLACES=375, PETRI_TRANSITIONS=436} [2022-07-13 22:24:35,599 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 215 predicate places. [2022-07-13 22:24:35,599 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 436 transitions, 3726 flow [2022-07-13 22:24:35,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:35,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:35,600 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:35,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:35,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 22:24:35,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash -574941255, now seen corresponding path program 8 times [2022-07-13 22:24:35,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:35,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060279435] [2022-07-13 22:24:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:36,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060279435] [2022-07-13 22:24:36,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060279435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609927917] [2022-07-13 22:24:36,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:24:36,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:36,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:36,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:24:36,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:24:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 22:24:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:36,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:24:36,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:36,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-13 22:24:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:36,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:36,650 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (= c_~x1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-13 22:24:36,662 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-13 22:24:36,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:36,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2022-07-13 22:24:36,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2022-07-13 22:24:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609927917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:36,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:36,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2022-07-13 22:24:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566194318] [2022-07-13 22:24:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:36,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 22:24:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 22:24:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=870, Unknown=2, NotChecked=122, Total=1122 [2022-07-13 22:24:36,924 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2022-07-13 22:24:36,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 436 transitions, 3726 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:36,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:36,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2022-07-13 22:24:36,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:38,895 INFO L129 PetriNetUnfolder]: 2670/9247 cut-off events. [2022-07-13 22:24:38,895 INFO L130 PetriNetUnfolder]: For 43687/44292 co-relation queries the response was YES. [2022-07-13 22:24:39,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34911 conditions, 9247 events. 2670/9247 cut-off events. For 43687/44292 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 99187 event pairs, 448 based on Foata normal form. 81/8974 useless extension candidates. Maximal degree in co-relation 34818. Up to 1922 conditions per place. [2022-07-13 22:24:39,130 INFO L132 encePairwiseOnDemand]: 152/179 looper letters, 207 selfloop transitions, 132 changer transitions 9/525 dead transitions. [2022-07-13 22:24:39,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 525 transitions, 5157 flow [2022-07-13 22:24:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 22:24:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-13 22:24:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2466 transitions. [2022-07-13 22:24:39,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.598979839689094 [2022-07-13 22:24:39,132 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2466 transitions. [2022-07-13 22:24:39,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2466 transitions. [2022-07-13 22:24:39,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:39,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2466 transitions. [2022-07-13 22:24:39,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.21739130434783) internal successors, (2466), 23 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:39,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:39,138 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:39,138 INFO L186 Difference]: Start difference. First operand has 375 places, 436 transitions, 3726 flow. Second operand 23 states and 2466 transitions. [2022-07-13 22:24:39,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 525 transitions, 5157 flow [2022-07-13 22:24:39,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 525 transitions, 4961 flow, removed 68 selfloop flow, removed 11 redundant places. [2022-07-13 22:24:39,306 INFO L242 Difference]: Finished difference. Result has 393 places, 458 transitions, 4183 flow [2022-07-13 22:24:39,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4183, PETRI_PLACES=393, PETRI_TRANSITIONS=458} [2022-07-13 22:24:39,306 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 233 predicate places. [2022-07-13 22:24:39,306 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 458 transitions, 4183 flow [2022-07-13 22:24:39,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:39,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:39,307 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:39,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:39,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:24:39,508 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1350777330, now seen corresponding path program 2 times [2022-07-13 22:24:39,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565916993] [2022-07-13 22:24:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:39,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:39,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565916993] [2022-07-13 22:24:39,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565916993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:39,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180936003] [2022-07-13 22:24:39,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:24:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:39,628 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:39,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:24:39,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:24:39,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:24:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:39,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:40,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180936003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:40,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:40,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-13 22:24:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662709839] [2022-07-13 22:24:40,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:40,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:24:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:24:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:24:40,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-13 22:24:40,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 458 transitions, 4183 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:40,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:40,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-13 22:24:40,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:42,589 INFO L129 PetriNetUnfolder]: 2745/10572 cut-off events. [2022-07-13 22:24:42,589 INFO L130 PetriNetUnfolder]: For 51207/51655 co-relation queries the response was YES. [2022-07-13 22:24:42,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40411 conditions, 10572 events. 2745/10572 cut-off events. For 51207/51655 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 117626 event pairs, 747 based on Foata normal form. 86/9935 useless extension candidates. Maximal degree in co-relation 40310. Up to 1156 conditions per place. [2022-07-13 22:24:42,733 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 138 selfloop transitions, 108 changer transitions 0/619 dead transitions. [2022-07-13 22:24:42,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 619 transitions, 5810 flow [2022-07-13 22:24:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 22:24:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 22:24:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4010 transitions. [2022-07-13 22:24:42,736 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8297123939582041 [2022-07-13 22:24:42,736 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4010 transitions. [2022-07-13 22:24:42,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4010 transitions. [2022-07-13 22:24:42,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:42,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4010 transitions. [2022-07-13 22:24:42,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 148.5185185185185) internal successors, (4010), 27 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:42,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:42,743 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:42,743 INFO L186 Difference]: Start difference. First operand has 393 places, 458 transitions, 4183 flow. Second operand 27 states and 4010 transitions. [2022-07-13 22:24:42,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 619 transitions, 5810 flow [2022-07-13 22:24:43,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 619 transitions, 5563 flow, removed 69 selfloop flow, removed 13 redundant places. [2022-07-13 22:24:43,036 INFO L242 Difference]: Finished difference. Result has 422 places, 542 transitions, 5114 flow [2022-07-13 22:24:43,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5114, PETRI_PLACES=422, PETRI_TRANSITIONS=542} [2022-07-13 22:24:43,037 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 262 predicate places. [2022-07-13 22:24:43,037 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 542 transitions, 5114 flow [2022-07-13 22:24:43,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:43,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:43,038 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:43,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:24:43,238 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash -379462702, now seen corresponding path program 3 times [2022-07-13 22:24:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:43,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18171830] [2022-07-13 22:24:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:43,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:43,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18171830] [2022-07-13 22:24:43,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18171830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154225192] [2022-07-13 22:24:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:24:43,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:43,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:43,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:24:43,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:24:43,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:24:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:43,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:43,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154225192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:43,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:43,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-13 22:24:43,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814770645] [2022-07-13 22:24:43,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:43,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:24:43,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:24:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:24:43,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-13 22:24:43,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 542 transitions, 5114 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:43,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:43,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-13 22:24:43,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:50,542 INFO L129 PetriNetUnfolder]: 4446/17008 cut-off events. [2022-07-13 22:24:50,542 INFO L130 PetriNetUnfolder]: For 89276/89966 co-relation queries the response was YES. [2022-07-13 22:24:50,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69543 conditions, 17008 events. 4446/17008 cut-off events. For 89276/89966 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 207077 event pairs, 1188 based on Foata normal form. 117/15948 useless extension candidates. Maximal degree in co-relation 69426. Up to 1762 conditions per place. [2022-07-13 22:24:51,047 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 226 selfloop transitions, 287 changer transitions 2/888 dead transitions. [2022-07-13 22:24:51,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 888 transitions, 9173 flow [2022-07-13 22:24:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-13 22:24:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-13 22:24:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 10511 transitions. [2022-07-13 22:24:51,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8270516956487528 [2022-07-13 22:24:51,056 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 10511 transitions. [2022-07-13 22:24:51,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 10511 transitions. [2022-07-13 22:24:51,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:51,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 10511 transitions. [2022-07-13 22:24:51,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 148.04225352112675) internal successors, (10511), 71 states have internal predecessors, (10511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:51,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 179.0) internal successors, (12888), 72 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:51,075 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 179.0) internal successors, (12888), 72 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:51,075 INFO L186 Difference]: Start difference. First operand has 422 places, 542 transitions, 5114 flow. Second operand 71 states and 10511 transitions. [2022-07-13 22:24:51,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 888 transitions, 9173 flow [2022-07-13 22:24:51,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 888 transitions, 8887 flow, removed 125 selfloop flow, removed 1 redundant places. [2022-07-13 22:24:51,871 INFO L242 Difference]: Finished difference. Result has 515 places, 730 transitions, 7783 flow [2022-07-13 22:24:51,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4968, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=7783, PETRI_PLACES=515, PETRI_TRANSITIONS=730} [2022-07-13 22:24:51,872 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 355 predicate places. [2022-07-13 22:24:51,872 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 730 transitions, 7783 flow [2022-07-13 22:24:51,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:51,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:51,873 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:51,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:24:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:52,073 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2070868552, now seen corresponding path program 4 times [2022-07-13 22:24:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:52,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872314656] [2022-07-13 22:24:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872314656] [2022-07-13 22:24:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872314656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416555072] [2022-07-13 22:24:52,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:24:52,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:52,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:52,202 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:52,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:24:52,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:24:52,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:24:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:52,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:24:52,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416555072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:52,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:52,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-13 22:24:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330799264] [2022-07-13 22:24:52,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 22:24:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 22:24:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-07-13 22:24:52,909 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-13 22:24:52,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 730 transitions, 7783 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:52,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:52,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-13 22:24:52,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:58,868 INFO L129 PetriNetUnfolder]: 5593/22143 cut-off events. [2022-07-13 22:24:58,868 INFO L130 PetriNetUnfolder]: For 149062/149971 co-relation queries the response was YES. [2022-07-13 22:24:59,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95757 conditions, 22143 events. 5593/22143 cut-off events. For 149062/149971 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 284848 event pairs, 1666 based on Foata normal form. 163/20772 useless extension candidates. Maximal degree in co-relation 95617. Up to 2209 conditions per place. [2022-07-13 22:24:59,203 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 275 selfloop transitions, 406 changer transitions 0/1054 dead transitions. [2022-07-13 22:24:59,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1054 transitions, 12905 flow [2022-07-13 22:24:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 22:24:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-13 22:24:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5835 transitions. [2022-07-13 22:24:59,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8358401375161152 [2022-07-13 22:24:59,206 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5835 transitions. [2022-07-13 22:24:59,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5835 transitions. [2022-07-13 22:24:59,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:59,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5835 transitions. [2022-07-13 22:24:59,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 149.6153846153846) internal successors, (5835), 39 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:59,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:59,216 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:59,216 INFO L186 Difference]: Start difference. First operand has 515 places, 730 transitions, 7783 flow. Second operand 39 states and 5835 transitions. [2022-07-13 22:24:59,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1054 transitions, 12905 flow [2022-07-13 22:25:00,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1054 transitions, 11921 flow, removed 446 selfloop flow, removed 3 redundant places. [2022-07-13 22:25:00,598 INFO L242 Difference]: Finished difference. Result has 568 places, 897 transitions, 10446 flow [2022-07-13 22:25:00,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10446, PETRI_PLACES=568, PETRI_TRANSITIONS=897} [2022-07-13 22:25:00,599 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 408 predicate places. [2022-07-13 22:25:00,599 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 897 transitions, 10446 flow [2022-07-13 22:25:00,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:00,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:00,600 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:25:00,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 22:25:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:00,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1560836330, now seen corresponding path program 5 times [2022-07-13 22:25:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:00,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488706150] [2022-07-13 22:25:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:00,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488706150] [2022-07-13 22:25:00,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488706150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521784355] [2022-07-13 22:25:00,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:25:00,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:00,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:00,956 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:25:00,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:25:01,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:25:01,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:25:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:25:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:01,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:01,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521784355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:01,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:01,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-13 22:25:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946251052] [2022-07-13 22:25:01,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:01,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:25:01,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:25:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:25:01,580 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-13 22:25:01,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 897 transitions, 10446 flow. Second operand has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:01,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:01,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-13 22:25:01,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:10,303 INFO L129 PetriNetUnfolder]: 5764/23078 cut-off events. [2022-07-13 22:25:10,304 INFO L130 PetriNetUnfolder]: For 179908/180899 co-relation queries the response was YES. [2022-07-13 22:25:10,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102854 conditions, 23078 events. 5764/23078 cut-off events. For 179908/180899 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 298374 event pairs, 1623 based on Foata normal form. 202/21766 useless extension candidates. Maximal degree in co-relation 102696. Up to 2201 conditions per place. [2022-07-13 22:25:10,697 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 241 selfloop transitions, 481 changer transitions 0/1095 dead transitions. [2022-07-13 22:25:10,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 1095 transitions, 14036 flow [2022-07-13 22:25:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-13 22:25:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-13 22:25:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 10075 transitions. [2022-07-13 22:25:10,702 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8277193558987841 [2022-07-13 22:25:10,702 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 10075 transitions. [2022-07-13 22:25:10,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 10075 transitions. [2022-07-13 22:25:10,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:10,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 10075 transitions. [2022-07-13 22:25:10,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 148.16176470588235) internal successors, (10075), 68 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:10,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:10,719 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:10,719 INFO L186 Difference]: Start difference. First operand has 568 places, 897 transitions, 10446 flow. Second operand 68 states and 10075 transitions. [2022-07-13 22:25:10,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 1095 transitions, 14036 flow [2022-07-13 22:25:12,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1095 transitions, 13643 flow, removed 177 selfloop flow, removed 3 redundant places. [2022-07-13 22:25:12,254 INFO L242 Difference]: Finished difference. Result has 643 places, 948 transitions, 12264 flow [2022-07-13 22:25:12,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=10171, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12264, PETRI_PLACES=643, PETRI_TRANSITIONS=948} [2022-07-13 22:25:12,255 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 483 predicate places. [2022-07-13 22:25:12,255 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 948 transitions, 12264 flow [2022-07-13 22:25:12,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:12,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:12,256 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:25:12,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:25:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-13 22:25:12,460 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1328439012, now seen corresponding path program 6 times [2022-07-13 22:25:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:12,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965922339] [2022-07-13 22:25:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:12,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965922339] [2022-07-13 22:25:12,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965922339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992758865] [2022-07-13 22:25:12,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:25:12,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:12,580 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:25:12,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:25:12,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:25:12,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:25:12,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:25:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:12,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:13,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992758865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:13,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:13,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-13 22:25:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972061328] [2022-07-13 22:25:13,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:13,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:25:13,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:25:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:25:13,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-13 22:25:13,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 948 transitions, 12264 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:13,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:13,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-13 22:25:13,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:20,631 INFO L129 PetriNetUnfolder]: 5762/23036 cut-off events. [2022-07-13 22:25:20,632 INFO L130 PetriNetUnfolder]: For 193041/194058 co-relation queries the response was YES. [2022-07-13 22:25:20,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106351 conditions, 23036 events. 5762/23036 cut-off events. For 193041/194058 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 297402 event pairs, 1654 based on Foata normal form. 199/21696 useless extension candidates. Maximal degree in co-relation 106181. Up to 2218 conditions per place. [2022-07-13 22:25:21,034 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 286 selfloop transitions, 409 changer transitions 0/1068 dead transitions. [2022-07-13 22:25:21,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1068 transitions, 14850 flow [2022-07-13 22:25:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 22:25:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 22:25:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6953 transitions. [2022-07-13 22:25:21,038 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8264590514679663 [2022-07-13 22:25:21,038 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6953 transitions. [2022-07-13 22:25:21,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6953 transitions. [2022-07-13 22:25:21,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:21,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6953 transitions. [2022-07-13 22:25:21,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 147.93617021276594) internal successors, (6953), 47 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:21,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:21,049 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:21,049 INFO L186 Difference]: Start difference. First operand has 643 places, 948 transitions, 12264 flow. Second operand 47 states and 6953 transitions. [2022-07-13 22:25:21,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1068 transitions, 14850 flow [2022-07-13 22:25:22,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1068 transitions, 14121 flow, removed 141 selfloop flow, removed 44 redundant places. [2022-07-13 22:25:22,871 INFO L242 Difference]: Finished difference. Result has 654 places, 971 transitions, 13058 flow [2022-07-13 22:25:22,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=11593, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13058, PETRI_PLACES=654, PETRI_TRANSITIONS=971} [2022-07-13 22:25:22,872 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 494 predicate places. [2022-07-13 22:25:22,872 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 971 transitions, 13058 flow [2022-07-13 22:25:22,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:22,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:22,872 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:25:22,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:25:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:23,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash -930600850, now seen corresponding path program 7 times [2022-07-13 22:25:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:23,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820260403] [2022-07-13 22:25:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820260403] [2022-07-13 22:25:23,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820260403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856573570] [2022-07-13 22:25:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:25:23,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:23,201 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:25:23,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:25:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:25:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:23,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:25:23,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856573570] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:23,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:23,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-13 22:25:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073796296] [2022-07-13 22:25:23,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:23,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:25:23,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:25:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:25:23,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-13 22:25:23,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 971 transitions, 13058 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:25:23,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:23,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-13 22:25:23,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand