./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/popl20-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:56:25,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:56:25,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:56:25,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:56:25,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:56:25,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:56:25,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:56:25,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:56:25,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:56:25,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:56:25,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:56:25,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:56:25,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:56:25,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:56:25,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:56:25,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:56:25,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:56:25,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:56:25,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:56:25,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:56:25,316 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:56:25,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:56:25,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:56:25,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:56:25,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:56:25,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:56:25,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:56:25,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:56:25,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:56:25,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:56:25,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:56:25,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:56:25,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:56:25,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:56:25,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:56:25,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:56:25,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:56:25,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:56:25,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:56:25,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:56:25,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:56:25,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:56:25,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:56:25,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:56:25,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:56:25,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:56:25,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:56:25,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:56:25,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:56:25,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:56:25,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:56:25,358 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:56:25,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:56:25,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:56:25,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:56:25,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:56:25,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:56:25,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:56:25,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:56:25,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:56:25,359 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:56:25,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:56:25,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:56:25,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:56:25,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:56:25,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:56:25,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:56:25,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:56:25,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:56:25,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:56:25,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:56:25,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:56:25,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:56:25,371 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:56:25,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:56:25,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:56:25,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-07-22 21:56:25,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:56:25,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:56:25,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:56:25,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:56:25,628 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:56:25,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-22 21:56:25,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afad34e8/9f489d64894a42c38199526a3b2378bc/FLAGc82043883 [2022-07-22 21:56:25,997 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:56:25,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-22 21:56:26,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afad34e8/9f489d64894a42c38199526a3b2378bc/FLAGc82043883 [2022-07-22 21:56:26,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afad34e8/9f489d64894a42c38199526a3b2378bc [2022-07-22 21:56:26,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:56:26,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:56:26,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:56:26,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:56:26,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:56:26,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7872e083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26, skipping insertion in model container [2022-07-22 21:56:26,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:56:26,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:56:26,682 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/popl20-simple-queue.wvr.c[2438,2451] [2022-07-22 21:56:26,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:56:26,704 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:56:26,720 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/popl20-simple-queue.wvr.c[2438,2451] [2022-07-22 21:56:26,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:56:26,734 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:56:26,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26 WrapperNode [2022-07-22 21:56:26,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:56:26,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:56:26,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:56:26,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:56:26,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,768 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-07-22 21:56:26,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:56:26,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:56:26,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:56:26,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:56:26,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:56:26,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:56:26,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:56:26,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:56:26,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (1/1) ... [2022-07-22 21:56:26,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:56:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:26,840 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) [2022-07-22 21:56:26,841 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 [2022-07-22 21:56:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:56:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:56:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:56:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:56:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:56:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:56:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:56:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:56:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:56:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:56:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:56:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:56:26,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:56:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:56:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:56:26,871 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:56:26,941 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:56:26,942 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:56:27,179 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:56:27,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:56:27,244 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:56:27,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:56:27 BoogieIcfgContainer [2022-07-22 21:56:27,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:56:27,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:56:27,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:56:27,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:56:27,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:56:26" (1/3) ... [2022-07-22 21:56:27,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c0af2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:56:27, skipping insertion in model container [2022-07-22 21:56:27,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:56:26" (2/3) ... [2022-07-22 21:56:27,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c0af2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:56:27, skipping insertion in model container [2022-07-22 21:56:27,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:56:27" (3/3) ... [2022-07-22 21:56:27,260 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-07-22 21:56:27,264 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:56:27,274 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:56:27,274 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:56:27,274 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:56:27,313 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:56:27,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-07-22 21:56:27,383 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2022-07-22 21:56:27,384 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:56:27,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-07-22 21:56:27,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-07-22 21:56:27,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-07-22 21:56:27,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:56:27,409 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@740f2450, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7eb437ae [2022-07-22 21:56:27,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:56:27,449 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-07-22 21:56:27,451 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:56:27,452 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:27,453 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] [2022-07-22 21:56:27,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash -93732278, now seen corresponding path program 1 times [2022-07-22 21:56:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:27,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344787248] [2022-07-22 21:56:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:27,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:27,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344787248] [2022-07-22 21:56:27,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344787248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:27,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:27,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:56:27,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246869014] [2022-07-22 21:56:27,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:27,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:56:27,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:56:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:56:27,693 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-07-22 21:56:27,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:27,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:27,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-07-22 21:56:27,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:27,756 INFO L129 PetriNetUnfolder]: 5/105 cut-off events. [2022-07-22 21:56:27,757 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:56:27,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-22 21:56:27,759 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-07-22 21:56:27,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-07-22 21:56:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:56:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:56:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-07-22 21:56:27,772 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-07-22 21:56:27,773 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-07-22 21:56:27,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-07-22 21:56:27,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:27,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-07-22 21:56:27,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:27,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:27,791 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:27,793 INFO L186 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-07-22 21:56:27,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-07-22 21:56:27,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:56:27,806 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-07-22 21:56:27,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-22 21:56:27,814 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-07-22 21:56:27,815 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-07-22 21:56:27,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:27,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:27,816 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] [2022-07-22 21:56:27,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:56:27,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1102375271, now seen corresponding path program 1 times [2022-07-22 21:56:27,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:27,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6166346] [2022-07-22 21:56:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:27,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:28,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6166346] [2022-07-22 21:56:28,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6166346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:28,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:28,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:56:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109849157] [2022-07-22 21:56:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:28,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:56:28,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:56:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:56:28,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-22 21:56:28,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:28,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-22 21:56:28,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:28,136 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2022-07-22 21:56:28,137 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:56:28,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-07-22 21:56:28,138 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-07-22 21:56:28,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-07-22 21:56:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:56:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:56:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-07-22 21:56:28,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-07-22 21:56:28,142 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-07-22 21:56:28,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-07-22 21:56:28,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:28,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-07-22 21:56:28,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,148 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-07-22 21:56:28,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-07-22 21:56:28,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:56:28,151 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-07-22 21:56:28,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-22 21:56:28,152 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-07-22 21:56:28,152 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-07-22 21:56:28,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:28,153 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] [2022-07-22 21:56:28,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:56:28,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1844346479, now seen corresponding path program 1 times [2022-07-22 21:56:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:28,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934811145] [2022-07-22 21:56:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:28,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934811145] [2022-07-22 21:56:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934811145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:28,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:28,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:56:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822869904] [2022-07-22 21:56:28,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:28,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:56:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:56:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:56:28,252 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-22 21:56:28,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:28,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-22 21:56:28,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:28,289 INFO L129 PetriNetUnfolder]: 8/142 cut-off events. [2022-07-22 21:56:28,289 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-07-22 21:56:28,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-07-22 21:56:28,291 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-07-22 21:56:28,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-07-22 21:56:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:56:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:56:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-07-22 21:56:28,293 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-22 21:56:28,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-07-22 21:56:28,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-07-22 21:56:28,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:28,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-07-22 21:56:28,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,296 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-07-22 21:56:28,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-07-22 21:56:28,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:56:28,300 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-07-22 21:56:28,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-07-22 21:56:28,301 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-07-22 21:56:28,301 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-07-22 21:56:28,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:28,302 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] [2022-07-22 21:56:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:56:28,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash 488492189, now seen corresponding path program 1 times [2022-07-22 21:56:28,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:28,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627635120] [2022-07-22 21:56:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:28,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:28,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:28,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627635120] [2022-07-22 21:56:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627635120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:28,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:28,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:56:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6127511] [2022-07-22 21:56:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:28,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:56:28,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:56:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:56:28,409 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-07-22 21:56:28,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:28,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-07-22 21:56:28,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:28,549 INFO L129 PetriNetUnfolder]: 8/185 cut-off events. [2022-07-22 21:56:28,550 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-22 21:56:28,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 363 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-07-22 21:56:28,552 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-07-22 21:56:28,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-07-22 21:56:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:56:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:56:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-07-22 21:56:28,555 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-07-22 21:56:28,556 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-07-22 21:56:28,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-07-22 21:56:28,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:28,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-07-22 21:56:28,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,564 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,564 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-07-22 21:56:28,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-07-22 21:56:28,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:56:28,572 INFO L242 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-07-22 21:56:28,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-07-22 21:56:28,574 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-07-22 21:56:28,580 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-07-22 21:56:28,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:28,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:28,582 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] [2022-07-22 21:56:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:56:28,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash -968534906, now seen corresponding path program 1 times [2022-07-22 21:56:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:28,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233320760] [2022-07-22 21:56:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233320760] [2022-07-22 21:56:29,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233320760] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033446645] [2022-07-22 21:56:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:29,111 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) [2022-07-22 21:56:29,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:56:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 21:56:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:29,287 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 [2022-07-22 21:56:29,334 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 21:56:29,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-22 21:56:29,757 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:56:29,758 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 15 treesize of output 15 [2022-07-22 21:56:29,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:56:30,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-22 21:56:30,276 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 [2022-07-22 21:56:30,416 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 23 treesize of output 7 [2022-07-22 21:56:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:31,272 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:31,273 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 60 treesize of output 48 [2022-07-22 21:56:31,284 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:56:31,285 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 140 treesize of output 131 [2022-07-22 21:56:31,293 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-22 21:56:31,294 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 124 treesize of output 100 [2022-07-22 21:56:31,302 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-22 21:56:31,303 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 79 treesize of output 67 [2022-07-22 21:56:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:31,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033446645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:31,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:31,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-07-22 21:56:31,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612990240] [2022-07-22 21:56:31,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:31,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 21:56:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 21:56:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1985, Unknown=32, NotChecked=0, Total=2450 [2022-07-22 21:56:31,873 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-22 21:56:31,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:31,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:31,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-22 21:56:31,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:34,306 INFO L129 PetriNetUnfolder]: 89/629 cut-off events. [2022-07-22 21:56:34,306 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2022-07-22 21:56:34,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 629 events. 89/629 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3639 event pairs, 0 based on Foata normal form. 4/589 useless extension candidates. Maximal degree in co-relation 1064. Up to 71 conditions per place. [2022-07-22 21:56:34,310 INFO L132 encePairwiseOnDemand]: 95/120 looper letters, 114 selfloop transitions, 44 changer transitions 25/225 dead transitions. [2022-07-22 21:56:34,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 964 flow [2022-07-22 21:56:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:56:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:56:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2008 transitions. [2022-07-22 21:56:34,316 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44035087719298244 [2022-07-22 21:56:34,316 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2008 transitions. [2022-07-22 21:56:34,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2008 transitions. [2022-07-22 21:56:34,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:34,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2008 transitions. [2022-07-22 21:56:34,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.8421052631579) internal successors, (2008), 38 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:34,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:34,330 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:34,331 INFO L186 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 38 states and 2008 transitions. [2022-07-22 21:56:34,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 964 flow [2022-07-22 21:56:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 225 transitions, 950 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-22 21:56:34,336 INFO L242 Difference]: Finished difference. Result has 163 places, 139 transitions, 552 flow [2022-07-22 21:56:34,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=552, PETRI_PLACES=163, PETRI_TRANSITIONS=139} [2022-07-22 21:56:34,337 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-22 21:56:34,337 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 139 transitions, 552 flow [2022-07-22 21:56:34,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:34,338 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:34,339 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] [2022-07-22 21:56:34,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:34,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:34,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash 194607390, now seen corresponding path program 2 times [2022-07-22 21:56:34,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:34,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257752563] [2022-07-22 21:56:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:34,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:35,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257752563] [2022-07-22 21:56:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257752563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853970035] [2022-07-22 21:56:35,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:56:35,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:35,147 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) [2022-07-22 21:56:35,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:56:35,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:56:35,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:56:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:35,621 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 15 treesize of output 11 [2022-07-22 21:56:35,892 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 [2022-07-22 21:56:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:56:36,033 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 [2022-07-22 21:56:36,130 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 23 treesize of output 7 [2022-07-22 21:56:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:36,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:36,205 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_98 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_98) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-22 21:56:36,873 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:36,873 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 57 treesize of output 45 [2022-07-22 21:56:36,882 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:36,882 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 100 treesize of output 100 [2022-07-22 21:56:36,892 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 60 treesize of output 48 [2022-07-22 21:56:36,902 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:36,903 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 51 treesize of output 55 [2022-07-22 21:56:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-22 21:56:37,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853970035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:37,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:37,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-07-22 21:56:37,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137097787] [2022-07-22 21:56:37,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 21:56:37,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 21:56:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2540, Unknown=10, NotChecked=102, Total=2862 [2022-07-22 21:56:37,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-22 21:56:37,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 139 transitions, 552 flow. Second operand has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:37,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:37,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-22 21:56:37,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:40,252 INFO L129 PetriNetUnfolder]: 178/1123 cut-off events. [2022-07-22 21:56:40,252 INFO L130 PetriNetUnfolder]: For 1080/1088 co-relation queries the response was YES. [2022-07-22 21:56:40,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2315 conditions, 1123 events. 178/1123 cut-off events. For 1080/1088 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8552 event pairs, 5 based on Foata normal form. 12/1045 useless extension candidates. Maximal degree in co-relation 2289. Up to 170 conditions per place. [2022-07-22 21:56:40,262 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 96 selfloop transitions, 85 changer transitions 15/238 dead transitions. [2022-07-22 21:56:40,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 238 transitions, 1432 flow [2022-07-22 21:56:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:56:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:56:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1976 transitions. [2022-07-22 21:56:40,269 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-07-22 21:56:40,269 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1976 transitions. [2022-07-22 21:56:40,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1976 transitions. [2022-07-22 21:56:40,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:40,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1976 transitions. [2022-07-22 21:56:40,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.0) internal successors, (1976), 38 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,285 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,285 INFO L186 Difference]: Start difference. First operand has 163 places, 139 transitions, 552 flow. Second operand 38 states and 1976 transitions. [2022-07-22 21:56:40,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 238 transitions, 1432 flow [2022-07-22 21:56:40,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 1263 flow, removed 72 selfloop flow, removed 19 redundant places. [2022-07-22 21:56:40,302 INFO L242 Difference]: Finished difference. Result has 184 places, 185 transitions, 1018 flow [2022-07-22 21:56:40,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1018, PETRI_PLACES=184, PETRI_TRANSITIONS=185} [2022-07-22 21:56:40,305 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 77 predicate places. [2022-07-22 21:56:40,305 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 185 transitions, 1018 flow [2022-07-22 21:56:40,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:40,307 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:56:40,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:40,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:56:40,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash 970602436, now seen corresponding path program 3 times [2022-07-22 21:56:40,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:40,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497033913] [2022-07-22 21:56:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:56:40,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497033913] [2022-07-22 21:56:40,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497033913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:40,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:56:40,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:56:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121557471] [2022-07-22 21:56:40,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:40,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:56:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:56:40,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:56:40,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-22 21:56:40,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 185 transitions, 1018 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:40,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-22 21:56:40,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:40,769 INFO L129 PetriNetUnfolder]: 124/1041 cut-off events. [2022-07-22 21:56:40,770 INFO L130 PetriNetUnfolder]: For 1657/1721 co-relation queries the response was YES. [2022-07-22 21:56:40,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1041 events. 124/1041 cut-off events. For 1657/1721 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8080 event pairs, 9 based on Foata normal form. 24/978 useless extension candidates. Maximal degree in co-relation 2164. Up to 178 conditions per place. [2022-07-22 21:56:40,778 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 55 selfloop transitions, 30 changer transitions 2/197 dead transitions. [2022-07-22 21:56:40,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 197 transitions, 1280 flow [2022-07-22 21:56:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:56:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:56:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2022-07-22 21:56:40,780 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-22 21:56:40,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2022-07-22 21:56:40,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2022-07-22 21:56:40,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:40,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2022-07-22 21:56:40,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,783 INFO L186 Difference]: Start difference. First operand has 184 places, 185 transitions, 1018 flow. Second operand 4 states and 432 transitions. [2022-07-22 21:56:40,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 197 transitions, 1280 flow [2022-07-22 21:56:40,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 1193 flow, removed 20 selfloop flow, removed 26 redundant places. [2022-07-22 21:56:40,795 INFO L242 Difference]: Finished difference. Result has 158 places, 189 transitions, 1108 flow [2022-07-22 21:56:40,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1108, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2022-07-22 21:56:40,796 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 51 predicate places. [2022-07-22 21:56:40,796 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 1108 flow [2022-07-22 21:56:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:40,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:40,797 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:40,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:56:40,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:40,798 INFO L85 PathProgramCache]: Analyzing trace with hash -455356886, now seen corresponding path program 4 times [2022-07-22 21:56:40,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:40,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843325888] [2022-07-22 21:56:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:40,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:56:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843325888] [2022-07-22 21:56:40,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843325888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676248716] [2022-07-22 21:56:40,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:56:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:40,906 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) [2022-07-22 21:56:40,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:56:40,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:56:40,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:56:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:56:41,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:56:41,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676248716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:41,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:41,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:56:41,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697702993] [2022-07-22 21:56:41,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:41,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:56:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:41,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:56:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:56:41,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-22 21:56:41,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 1108 flow. Second operand has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:41,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:41,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-22 21:56:41,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:41,580 INFO L129 PetriNetUnfolder]: 45/592 cut-off events. [2022-07-22 21:56:41,581 INFO L130 PetriNetUnfolder]: For 1096/1133 co-relation queries the response was YES. [2022-07-22 21:56:41,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 592 events. 45/592 cut-off events. For 1096/1133 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3467 event pairs, 11 based on Foata normal form. 11/554 useless extension candidates. Maximal degree in co-relation 1210. Up to 103 conditions per place. [2022-07-22 21:56:41,584 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 48 selfloop transitions, 11 changer transitions 21/159 dead transitions. [2022-07-22 21:56:41,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 159 transitions, 917 flow [2022-07-22 21:56:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:56:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:56:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-07-22 21:56:41,588 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7798611111111111 [2022-07-22 21:56:41,589 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-07-22 21:56:41,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-07-22 21:56:41,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:41,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-07-22 21:56:41,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:41,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:41,595 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:41,595 INFO L186 Difference]: Start difference. First operand has 158 places, 189 transitions, 1108 flow. Second operand 12 states and 1123 transitions. [2022-07-22 21:56:41,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 159 transitions, 917 flow [2022-07-22 21:56:41,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 159 transitions, 895 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-22 21:56:41,601 INFO L242 Difference]: Finished difference. Result has 163 places, 134 transitions, 632 flow [2022-07-22 21:56:41,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=632, PETRI_PLACES=163, PETRI_TRANSITIONS=134} [2022-07-22 21:56:41,604 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-22 21:56:41,605 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 134 transitions, 632 flow [2022-07-22 21:56:41,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:41,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:41,606 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2022-07-22 21:56:41,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:41,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:41,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -458696651, now seen corresponding path program 5 times [2022-07-22 21:56:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:41,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260648172] [2022-07-22 21:56:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:41,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:42,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:42,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260648172] [2022-07-22 21:56:42,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260648172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:42,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791744117] [2022-07-22 21:56:42,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:56:42,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:42,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:42,412 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) [2022-07-22 21:56:42,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:56:42,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:56:42,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-22 21:56:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:42,509 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 [2022-07-22 21:56:42,681 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:56:42,682 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 [2022-07-22 21:56:43,321 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 19 treesize of output 21 [2022-07-22 21:56:43,504 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 19 treesize of output 7 [2022-07-22 21:56:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:43,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:43,715 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:43,716 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 42 treesize of output 42 [2022-07-22 21:56:43,725 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 [2022-07-22 21:56:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791744117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:44,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:44,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-07-22 21:56:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681009067] [2022-07-22 21:56:44,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:44,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 21:56:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 21:56:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 21:56:44,736 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-22 21:56:44,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 134 transitions, 632 flow. Second operand has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:44,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:44,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-22 21:56:44,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:49,188 INFO L129 PetriNetUnfolder]: 259/1704 cut-off events. [2022-07-22 21:56:49,188 INFO L130 PetriNetUnfolder]: For 3342/3346 co-relation queries the response was YES. [2022-07-22 21:56:49,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 1704 events. 259/1704 cut-off events. For 3342/3346 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14766 event pairs, 8 based on Foata normal form. 14/1582 useless extension candidates. Maximal degree in co-relation 4061. Up to 213 conditions per place. [2022-07-22 21:56:49,201 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 156 selfloop transitions, 91 changer transitions 49/338 dead transitions. [2022-07-22 21:56:49,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 338 transitions, 2566 flow [2022-07-22 21:56:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 21:56:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-22 21:56:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3082 transitions. [2022-07-22 21:56:49,208 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.442816091954023 [2022-07-22 21:56:49,208 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3082 transitions. [2022-07-22 21:56:49,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3082 transitions. [2022-07-22 21:56:49,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:49,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3082 transitions. [2022-07-22 21:56:49,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.13793103448276) internal successors, (3082), 58 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:49,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:49,250 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:49,250 INFO L186 Difference]: Start difference. First operand has 163 places, 134 transitions, 632 flow. Second operand 58 states and 3082 transitions. [2022-07-22 21:56:49,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 338 transitions, 2566 flow [2022-07-22 21:56:49,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 338 transitions, 2402 flow, removed 66 selfloop flow, removed 14 redundant places. [2022-07-22 21:56:49,266 INFO L242 Difference]: Finished difference. Result has 225 places, 195 transitions, 1554 flow [2022-07-22 21:56:49,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1554, PETRI_PLACES=225, PETRI_TRANSITIONS=195} [2022-07-22 21:56:49,267 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 118 predicate places. [2022-07-22 21:56:49,267 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 195 transitions, 1554 flow [2022-07-22 21:56:49,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:49,269 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:49,269 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-22 21:56:49,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:49,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:49,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:49,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1601581429, now seen corresponding path program 6 times [2022-07-22 21:56:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:49,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823277841] [2022-07-22 21:56:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:49,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:50,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823277841] [2022-07-22 21:56:50,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823277841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731558644] [2022-07-22 21:56:50,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:56:50,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:50,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:50,053 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) [2022-07-22 21:56:50,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:56:50,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 21:56:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:50,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 21:56:50,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:50,576 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 15 treesize of output 11 [2022-07-22 21:56:50,814 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 [2022-07-22 21:56:50,912 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 [2022-07-22 21:56:51,155 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:56:51,156 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 23 treesize of output 10 [2022-07-22 21:56:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:51,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:52,179 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:52,182 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 61 treesize of output 49 [2022-07-22 21:56:52,191 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 21:56:52,192 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 144 treesize of output 136 [2022-07-22 21:56:52,199 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:56:52,199 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 127 treesize of output 101 [2022-07-22 21:56:52,207 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:56:52,208 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 80 treesize of output 67 [2022-07-22 21:56:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:52,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731558644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:52,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:52,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 23] total 61 [2022-07-22 21:56:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714364448] [2022-07-22 21:56:52,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 21:56:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 21:56:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3215, Unknown=37, NotChecked=0, Total=3660 [2022-07-22 21:56:52,819 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-22 21:56:52,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 195 transitions, 1554 flow. Second operand has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:52,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:52,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-22 21:56:52,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:56,411 INFO L129 PetriNetUnfolder]: 517/2812 cut-off events. [2022-07-22 21:56:56,411 INFO L130 PetriNetUnfolder]: For 13830/13891 co-relation queries the response was YES. [2022-07-22 21:56:56,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8491 conditions, 2812 events. 517/2812 cut-off events. For 13830/13891 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 27202 event pairs, 19 based on Foata normal form. 36/2628 useless extension candidates. Maximal degree in co-relation 8442. Up to 440 conditions per place. [2022-07-22 21:56:56,440 INFO L132 encePairwiseOnDemand]: 87/120 looper letters, 176 selfloop transitions, 140 changer transitions 30/391 dead transitions. [2022-07-22 21:56:56,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 391 transitions, 4023 flow [2022-07-22 21:56:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 21:56:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-22 21:56:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2660 transitions. [2022-07-22 21:56:56,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2022-07-22 21:56:56,445 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2660 transitions. [2022-07-22 21:56:56,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2660 transitions. [2022-07-22 21:56:56,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:56,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2660 transitions. [2022-07-22 21:56:56,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.416666666666664) internal successors, (2660), 48 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:56,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:56,470 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:56,470 INFO L186 Difference]: Start difference. First operand has 225 places, 195 transitions, 1554 flow. Second operand 48 states and 2660 transitions. [2022-07-22 21:56:56,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 391 transitions, 4023 flow [2022-07-22 21:56:56,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 391 transitions, 3690 flow, removed 147 selfloop flow, removed 31 redundant places. [2022-07-22 21:56:56,506 INFO L242 Difference]: Finished difference. Result has 246 places, 286 transitions, 2961 flow [2022-07-22 21:56:56,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2961, PETRI_PLACES=246, PETRI_TRANSITIONS=286} [2022-07-22 21:56:56,507 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 139 predicate places. [2022-07-22 21:56:56,508 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 2961 flow [2022-07-22 21:56:56,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:56,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:56,509 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-22 21:56:56,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:56:56,737 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,SelfDestructingSolverStorable9 [2022-07-22 21:56:56,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1615726847, now seen corresponding path program 7 times [2022-07-22 21:56:56,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:56,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380207453] [2022-07-22 21:56:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380207453] [2022-07-22 21:56:57,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380207453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693060427] [2022-07-22 21:56:57,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:56:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:57,240 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) [2022-07-22 21:56:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:56:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 21:56:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:57,896 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:56:57,896 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 23 treesize of output 10 [2022-07-22 21:56:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:57,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:58,017 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 21:56:58,017 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 25 treesize of output 17 [2022-07-22 21:56:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:58,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693060427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:58,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:58,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-22 21:56:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284032333] [2022-07-22 21:56:58,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 21:56:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 21:56:58,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 21:56:58,853 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-22 21:56:58,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 286 transitions, 2961 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:56:58,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:58,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-22 21:56:58,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:02,810 INFO L129 PetriNetUnfolder]: 1034/5302 cut-off events. [2022-07-22 21:57:02,810 INFO L130 PetriNetUnfolder]: For 50600/50832 co-relation queries the response was YES. [2022-07-22 21:57:02,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 5302 events. 1034/5302 cut-off events. For 50600/50832 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 58106 event pairs, 4 based on Foata normal form. 93/4996 useless extension candidates. Maximal degree in co-relation 21781. Up to 956 conditions per place. [2022-07-22 21:57:02,866 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 283 selfloop transitions, 288 changer transitions 62/681 dead transitions. [2022-07-22 21:57:02,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 681 transitions, 9896 flow [2022-07-22 21:57:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-22 21:57:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-22 21:57:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4159 transitions. [2022-07-22 21:57:02,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5251262626262626 [2022-07-22 21:57:02,872 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4159 transitions. [2022-07-22 21:57:02,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4159 transitions. [2022-07-22 21:57:02,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:02,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4159 transitions. [2022-07-22 21:57:02,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 63.015151515151516) internal successors, (4159), 66 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:02,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:02,891 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:02,891 INFO L186 Difference]: Start difference. First operand has 246 places, 286 transitions, 2961 flow. Second operand 66 states and 4159 transitions. [2022-07-22 21:57:02,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 681 transitions, 9896 flow [2022-07-22 21:57:03,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 681 transitions, 9398 flow, removed 219 selfloop flow, removed 30 redundant places. [2022-07-22 21:57:03,026 INFO L242 Difference]: Finished difference. Result has 308 places, 452 transitions, 6366 flow [2022-07-22 21:57:03,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6366, PETRI_PLACES=308, PETRI_TRANSITIONS=452} [2022-07-22 21:57:03,028 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 201 predicate places. [2022-07-22 21:57:03,028 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 452 transitions, 6366 flow [2022-07-22 21:57:03,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:03,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:03,029 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-22 21:57:03,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:03,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:03,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2050011769, now seen corresponding path program 8 times [2022-07-22 21:57:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187653752] [2022-07-22 21:57:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:03,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:03,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187653752] [2022-07-22 21:57:03,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187653752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268372903] [2022-07-22 21:57:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:57:03,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:03,777 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) [2022-07-22 21:57:03,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:57:03,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:57:03,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 21:57:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:04,322 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 15 treesize of output 11 [2022-07-22 21:57:04,569 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 [2022-07-22 21:57:04,658 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 [2022-07-22 21:57:04,905 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:57:04,905 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 23 treesize of output 10 [2022-07-22 21:57:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:04,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:05,841 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:05,842 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 61 treesize of output 49 [2022-07-22 21:57:05,853 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 21:57:05,855 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 308 treesize of output 283 [2022-07-22 21:57:05,867 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:57:05,867 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 274 treesize of output 248 [2022-07-22 21:57:05,875 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:57:05,875 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 248 treesize of output 196 [2022-07-22 21:57:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:06,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268372903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:06,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:06,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 23] total 62 [2022-07-22 21:57:06,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379463284] [2022-07-22 21:57:06,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:06,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 21:57:06,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 21:57:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3326, Unknown=43, NotChecked=0, Total=3782 [2022-07-22 21:57:06,491 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-22 21:57:06,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 452 transitions, 6366 flow. Second operand has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:06,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:06,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-22 21:57:06,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:09,974 INFO L129 PetriNetUnfolder]: 1322/6904 cut-off events. [2022-07-22 21:57:09,974 INFO L130 PetriNetUnfolder]: For 99079/99400 co-relation queries the response was YES. [2022-07-22 21:57:10,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32509 conditions, 6904 events. 1322/6904 cut-off events. For 99079/99400 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 81888 event pairs, 6 based on Foata normal form. 94/6457 useless extension candidates. Maximal degree in co-relation 32429. Up to 1269 conditions per place. [2022-07-22 21:57:10,053 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 287 selfloop transitions, 413 changer transitions 42/787 dead transitions. [2022-07-22 21:57:10,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 787 transitions, 14014 flow [2022-07-22 21:57:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 21:57:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-22 21:57:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2895 transitions. [2022-07-22 21:57:10,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2022-07-22 21:57:10,057 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2895 transitions. [2022-07-22 21:57:10,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2895 transitions. [2022-07-22 21:57:10,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:10,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2895 transitions. [2022-07-22 21:57:10,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.67307692307692) internal successors, (2895), 52 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) [2022-07-22 21:57:10,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:10,068 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:10,069 INFO L186 Difference]: Start difference. First operand has 308 places, 452 transitions, 6366 flow. Second operand 52 states and 2895 transitions. [2022-07-22 21:57:10,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 787 transitions, 14014 flow [2022-07-22 21:57:10,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 787 transitions, 12869 flow, removed 538 selfloop flow, removed 35 redundant places. [2022-07-22 21:57:10,373 INFO L242 Difference]: Finished difference. Result has 331 places, 624 transitions, 10240 flow [2022-07-22 21:57:10,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10240, PETRI_PLACES=331, PETRI_TRANSITIONS=624} [2022-07-22 21:57:10,374 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 224 predicate places. [2022-07-22 21:57:10,375 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 624 transitions, 10240 flow [2022-07-22 21:57:10,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:10,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:10,376 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-22 21:57:10,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:57:10,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:10,589 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 122552891, now seen corresponding path program 9 times [2022-07-22 21:57:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:10,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804866255] [2022-07-22 21:57:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:10,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:11,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:11,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804866255] [2022-07-22 21:57:11,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804866255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:11,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169626629] [2022-07-22 21:57:11,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:57:11,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:11,065 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) [2022-07-22 21:57:11,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:57:11,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:57:11,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:57:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:11,461 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:57:11,461 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 23 treesize of output 10 [2022-07-22 21:57:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:57:11,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:11,684 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:57:11,684 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 24 treesize of output 15 [2022-07-22 21:57:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:57:11,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169626629] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:11,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:11,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9, 9] total 30 [2022-07-22 21:57:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609725302] [2022-07-22 21:57:11,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:11,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 21:57:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 21:57:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:57:11,880 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-22 21:57:11,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 624 transitions, 10240 flow. Second operand has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:11,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:11,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-22 21:57:11,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:14,895 INFO L129 PetriNetUnfolder]: 1864/9791 cut-off events. [2022-07-22 21:57:14,895 INFO L130 PetriNetUnfolder]: For 174955/175607 co-relation queries the response was YES. [2022-07-22 21:57:14,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49603 conditions, 9791 events. 1864/9791 cut-off events. For 174955/175607 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 125621 event pairs, 76 based on Foata normal form. 92/9113 useless extension candidates. Maximal degree in co-relation 49517. Up to 2413 conditions per place. [2022-07-22 21:57:15,000 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 538 selfloop transitions, 339 changer transitions 65/990 dead transitions. [2022-07-22 21:57:15,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 990 transitions, 19122 flow [2022-07-22 21:57:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 21:57:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-22 21:57:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2915 transitions. [2022-07-22 21:57:15,004 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5168439716312057 [2022-07-22 21:57:15,004 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2915 transitions. [2022-07-22 21:57:15,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2915 transitions. [2022-07-22 21:57:15,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:15,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2915 transitions. [2022-07-22 21:57:15,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 62.02127659574468) internal successors, (2915), 47 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:15,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:15,014 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:15,015 INFO L186 Difference]: Start difference. First operand has 331 places, 624 transitions, 10240 flow. Second operand 47 states and 2915 transitions. [2022-07-22 21:57:15,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 990 transitions, 19122 flow [2022-07-22 21:57:15,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 990 transitions, 18236 flow, removed 388 selfloop flow, removed 32 redundant places. [2022-07-22 21:57:15,721 INFO L242 Difference]: Finished difference. Result has 363 places, 849 transitions, 15638 flow [2022-07-22 21:57:15,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9769, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15638, PETRI_PLACES=363, PETRI_TRANSITIONS=849} [2022-07-22 21:57:15,722 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 256 predicate places. [2022-07-22 21:57:15,722 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 849 transitions, 15638 flow [2022-07-22 21:57:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:15,723 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:15,723 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-22 21:57:15,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 21:57:15,939 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,SelfDestructingSolverStorable12 [2022-07-22 21:57:15,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1652157435, now seen corresponding path program 10 times [2022-07-22 21:57:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:15,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81587890] [2022-07-22 21:57:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81587890] [2022-07-22 21:57:16,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81587890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113110841] [2022-07-22 21:57:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:57:16,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:16,314 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) [2022-07-22 21:57:16,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:57:16,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:57:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 21:57:16,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:16,989 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:57:16,990 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 23 treesize of output 10 [2022-07-22 21:57:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:17,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:17,088 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 21:57:17,088 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 25 treesize of output 17 [2022-07-22 21:57:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:17,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113110841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:17,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:17,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-22 21:57:17,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169184463] [2022-07-22 21:57:17,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:17,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 21:57:17,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 21:57:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 21:57:17,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-22 21:57:17,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 849 transitions, 15638 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:17,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:17,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-22 21:57:17,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:25,612 INFO L129 PetriNetUnfolder]: 3300/16834 cut-off events. [2022-07-22 21:57:25,612 INFO L130 PetriNetUnfolder]: For 465858/466988 co-relation queries the response was YES. [2022-07-22 21:57:25,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101923 conditions, 16834 events. 3300/16834 cut-off events. For 465858/466988 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 231849 event pairs, 12 based on Foata normal form. 308/15862 useless extension candidates. Maximal degree in co-relation 101821. Up to 2711 conditions per place. [2022-07-22 21:57:25,990 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 621 selfloop transitions, 877 changer transitions 114/1660 dead transitions. [2022-07-22 21:57:25,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1660 transitions, 37553 flow [2022-07-22 21:57:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 21:57:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-22 21:57:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4404 transitions. [2022-07-22 21:57:26,002 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2022-07-22 21:57:26,003 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4404 transitions. [2022-07-22 21:57:26,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4404 transitions. [2022-07-22 21:57:26,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:26,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4404 transitions. [2022-07-22 21:57:26,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 62.91428571428571) internal successors, (4404), 70 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:26,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:26,025 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:26,026 INFO L186 Difference]: Start difference. First operand has 363 places, 849 transitions, 15638 flow. Second operand 70 states and 4404 transitions. [2022-07-22 21:57:26,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1660 transitions, 37553 flow [2022-07-22 21:57:28,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1660 transitions, 36524 flow, removed 487 selfloop flow, removed 27 redundant places. [2022-07-22 21:57:28,246 INFO L242 Difference]: Finished difference. Result has 430 places, 1244 transitions, 27398 flow [2022-07-22 21:57:28,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=15291, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=27398, PETRI_PLACES=430, PETRI_TRANSITIONS=1244} [2022-07-22 21:57:28,247 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 323 predicate places. [2022-07-22 21:57:28,247 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1244 transitions, 27398 flow [2022-07-22 21:57:28,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:28,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:28,248 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-22 21:57:28,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:28,449 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,SelfDestructingSolverStorable13 [2022-07-22 21:57:28,449 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1495727277, now seen corresponding path program 11 times [2022-07-22 21:57:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197270143] [2022-07-22 21:57:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:29,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197270143] [2022-07-22 21:57:29,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197270143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40408653] [2022-07-22 21:57:29,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:57:29,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:29,012 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) [2022-07-22 21:57:29,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:57:29,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:57:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:29,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 21:57:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:29,104 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 [2022-07-22 21:57:29,186 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:57:29,186 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 [2022-07-22 21:57:29,523 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 [2022-07-22 21:57:29,688 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:57:29,688 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 23 treesize of output 10 [2022-07-22 21:57:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:57:29,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:29,790 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_342 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_342) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-22 21:57:29,804 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:29,804 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 44 treesize of output 44 [2022-07-22 21:57:29,807 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 14 treesize of output 7 [2022-07-22 21:57:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:57:30,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40408653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:30,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:30,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 39 [2022-07-22 21:57:30,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672840222] [2022-07-22 21:57:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:30,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:57:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:57:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1304, Unknown=1, NotChecked=72, Total=1482 [2022-07-22 21:57:30,198 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-07-22 21:57:30,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1244 transitions, 27398 flow. Second operand has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:30,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-07-22 21:57:30,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:38,140 INFO L129 PetriNetUnfolder]: 3683/18623 cut-off events. [2022-07-22 21:57:38,141 INFO L130 PetriNetUnfolder]: For 574379/575886 co-relation queries the response was YES. [2022-07-22 21:57:38,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119929 conditions, 18623 events. 3683/18623 cut-off events. For 574379/575886 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 261848 event pairs, 289 based on Foata normal form. 187/17340 useless extension candidates. Maximal degree in co-relation 119798. Up to 6830 conditions per place. [2022-07-22 21:57:38,508 INFO L132 encePairwiseOnDemand]: 93/120 looper letters, 1172 selfloop transitions, 262 changer transitions 30/1507 dead transitions. [2022-07-22 21:57:38,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1507 transitions, 36498 flow [2022-07-22 21:57:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:57:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:57:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2059 transitions. [2022-07-22 21:57:38,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45153508771929823 [2022-07-22 21:57:38,511 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2059 transitions. [2022-07-22 21:57:38,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2059 transitions. [2022-07-22 21:57:38,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:38,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2059 transitions. [2022-07-22 21:57:38,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 54.18421052631579) internal successors, (2059), 38 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:38,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:38,521 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:38,521 INFO L186 Difference]: Start difference. First operand has 430 places, 1244 transitions, 27398 flow. Second operand 38 states and 2059 transitions. [2022-07-22 21:57:38,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1507 transitions, 36498 flow [2022-07-22 21:57:41,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1507 transitions, 35356 flow, removed 509 selfloop flow, removed 38 redundant places. [2022-07-22 21:57:41,039 INFO L242 Difference]: Finished difference. Result has 425 places, 1369 transitions, 30467 flow [2022-07-22 21:57:41,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=26475, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=984, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=30467, PETRI_PLACES=425, PETRI_TRANSITIONS=1369} [2022-07-22 21:57:41,041 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 318 predicate places. [2022-07-22 21:57:41,041 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1369 transitions, 30467 flow [2022-07-22 21:57:41,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:41,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:41,042 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-07-22 21:57:41,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:41,243 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,SelfDestructingSolverStorable14 [2022-07-22 21:57:41,244 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash 730214897, now seen corresponding path program 12 times [2022-07-22 21:57:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:41,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315268020] [2022-07-22 21:57:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:57:41,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:41,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315268020] [2022-07-22 21:57:41,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315268020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:41,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308660204] [2022-07-22 21:57:41,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:57:41,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:41,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:41,342 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) [2022-07-22 21:57:41,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:57:41,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 21:57:41,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:57:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:57:41,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:57:41,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308660204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:41,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:41,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-07-22 21:57:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198241310] [2022-07-22 21:57:41,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:41,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 21:57:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 21:57:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-22 21:57:41,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-22 21:57:41,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1369 transitions, 30467 flow. Second operand has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:41,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:41,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-22 21:57:41,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:43,837 INFO L129 PetriNetUnfolder]: 827/5656 cut-off events. [2022-07-22 21:57:43,837 INFO L130 PetriNetUnfolder]: For 163954/164737 co-relation queries the response was YES. [2022-07-22 21:57:43,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32221 conditions, 5656 events. 827/5656 cut-off events. For 163954/164737 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 68952 event pairs, 84 based on Foata normal form. 157/5287 useless extension candidates. Maximal degree in co-relation 32094. Up to 1241 conditions per place. [2022-07-22 21:57:43,907 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 396 selfloop transitions, 23 changer transitions 19/550 dead transitions. [2022-07-22 21:57:43,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 550 transitions, 11756 flow [2022-07-22 21:57:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:57:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:57:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1493 transitions. [2022-07-22 21:57:43,909 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7776041666666667 [2022-07-22 21:57:43,909 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1493 transitions. [2022-07-22 21:57:43,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1493 transitions. [2022-07-22 21:57:43,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:43,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1493 transitions. [2022-07-22 21:57:43,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.3125) internal successors, (1493), 16 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:43,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:43,913 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:43,913 INFO L186 Difference]: Start difference. First operand has 425 places, 1369 transitions, 30467 flow. Second operand 16 states and 1493 transitions. [2022-07-22 21:57:43,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 550 transitions, 11756 flow [2022-07-22 21:57:44,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 550 transitions, 10827 flow, removed 260 selfloop flow, removed 64 redundant places. [2022-07-22 21:57:44,374 INFO L242 Difference]: Finished difference. Result has 345 places, 517 transitions, 9316 flow [2022-07-22 21:57:44,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9316, PETRI_PLACES=345, PETRI_TRANSITIONS=517} [2022-07-22 21:57:44,375 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 238 predicate places. [2022-07-22 21:57:44,375 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 517 transitions, 9316 flow [2022-07-22 21:57:44,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:44,375 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:44,375 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-07-22 21:57:44,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:44,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 21:57:44,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash -87345653, now seen corresponding path program 13 times [2022-07-22 21:57:44,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:44,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128683463] [2022-07-22 21:57:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:44,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:57:44,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128683463] [2022-07-22 21:57:44,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128683463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993826495] [2022-07-22 21:57:44,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:57:44,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:44,668 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) [2022-07-22 21:57:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:57:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 21:57:44,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:45,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:45,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993826495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:45,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:45,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 29 [2022-07-22 21:57:45,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714766731] [2022-07-22 21:57:45,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:45,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 21:57:45,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 21:57:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-07-22 21:57:45,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-07-22 21:57:45,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 517 transitions, 9316 flow. Second operand has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:45,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:45,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-07-22 21:57:45,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:47,308 INFO L129 PetriNetUnfolder]: 796/6156 cut-off events. [2022-07-22 21:57:47,308 INFO L130 PetriNetUnfolder]: For 143453/144327 co-relation queries the response was YES. [2022-07-22 21:57:47,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31740 conditions, 6156 events. 796/6156 cut-off events. For 143453/144327 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 77082 event pairs, 85 based on Foata normal form. 378/5979 useless extension candidates. Maximal degree in co-relation 31641. Up to 888 conditions per place. [2022-07-22 21:57:47,365 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 164 selfloop transitions, 189 changer transitions 115/559 dead transitions. [2022-07-22 21:57:47,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 11473 flow [2022-07-22 21:57:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 21:57:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-22 21:57:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2276 transitions. [2022-07-22 21:57:47,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7586666666666667 [2022-07-22 21:57:47,368 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2276 transitions. [2022-07-22 21:57:47,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2276 transitions. [2022-07-22 21:57:47,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:47,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2276 transitions. [2022-07-22 21:57:47,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 91.04) internal successors, (2276), 25 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:47,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:47,374 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:47,374 INFO L186 Difference]: Start difference. First operand has 345 places, 517 transitions, 9316 flow. Second operand 25 states and 2276 transitions. [2022-07-22 21:57:47,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 11473 flow [2022-07-22 21:57:47,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 559 transitions, 11234 flow, removed 49 selfloop flow, removed 22 redundant places. [2022-07-22 21:57:47,761 INFO L242 Difference]: Finished difference. Result has 346 places, 424 transitions, 8648 flow [2022-07-22 21:57:47,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8648, PETRI_PLACES=346, PETRI_TRANSITIONS=424} [2022-07-22 21:57:47,762 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 239 predicate places. [2022-07-22 21:57:47,762 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 424 transitions, 8648 flow [2022-07-22 21:57:47,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:47,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:47,763 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 21:57:47,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:47,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:57:47,986 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -78433764, now seen corresponding path program 14 times [2022-07-22 21:57:47,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:47,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035916389] [2022-07-22 21:57:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:48,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035916389] [2022-07-22 21:57:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035916389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692009090] [2022-07-22 21:57:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:57:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:48,989 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) [2022-07-22 21:57:48,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:57:49,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:57:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:49,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 21:57:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:57:49,957 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 19 treesize of output 21 [2022-07-22 21:57:50,072 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:57:50,073 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 24 treesize of output 10 [2022-07-22 21:57:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:50,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:50,147 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_431 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_431) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-07-22 21:57:50,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:50,228 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 42 treesize of output 42 [2022-07-22 21:57:50,232 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 [2022-07-22 21:57:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:51,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692009090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:51,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:51,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-07-22 21:57:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164952418] [2022-07-22 21:57:51,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:51,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 21:57:51,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 21:57:51,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=3488, Unknown=5, NotChecked=120, Total=3906 [2022-07-22 21:57:51,352 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-22 21:57:51,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 424 transitions, 8648 flow. Second operand has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:51,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:51,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-22 21:57:51,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:57,772 INFO L129 PetriNetUnfolder]: 1595/10117 cut-off events. [2022-07-22 21:57:57,772 INFO L130 PetriNetUnfolder]: For 258183/258915 co-relation queries the response was YES. [2022-07-22 21:57:57,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58801 conditions, 10117 events. 1595/10117 cut-off events. For 258183/258915 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136960 event pairs, 80 based on Foata normal form. 198/9454 useless extension candidates. Maximal degree in co-relation 58704. Up to 2097 conditions per place. [2022-07-22 21:57:57,901 INFO L132 encePairwiseOnDemand]: 92/120 looper letters, 459 selfloop transitions, 368 changer transitions 75/947 dead transitions. [2022-07-22 21:57:57,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 947 transitions, 23371 flow [2022-07-22 21:57:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 21:57:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-22 21:57:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3428 transitions. [2022-07-22 21:57:57,906 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4761111111111111 [2022-07-22 21:57:57,906 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3428 transitions. [2022-07-22 21:57:57,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3428 transitions. [2022-07-22 21:57:57,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:57,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3428 transitions. [2022-07-22 21:57:57,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.13333333333333) internal successors, (3428), 60 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,056 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,056 INFO L186 Difference]: Start difference. First operand has 346 places, 424 transitions, 8648 flow. Second operand 60 states and 3428 transitions. [2022-07-22 21:57:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 947 transitions, 23371 flow [2022-07-22 21:57:58,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 947 transitions, 21425 flow, removed 908 selfloop flow, removed 46 redundant places. [2022-07-22 21:57:58,879 INFO L242 Difference]: Finished difference. Result has 347 places, 738 transitions, 17704 flow [2022-07-22 21:57:58,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=8165, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17704, PETRI_PLACES=347, PETRI_TRANSITIONS=738} [2022-07-22 21:57:58,880 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 240 predicate places. [2022-07-22 21:57:58,880 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 738 transitions, 17704 flow [2022-07-22 21:57:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:58,881 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:58,881 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 21:57:58,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:59,081 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,SelfDestructingSolverStorable17 [2022-07-22 21:57:59,082 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -102659002, now seen corresponding path program 15 times [2022-07-22 21:57:59,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:59,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981846309] [2022-07-22 21:57:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981846309] [2022-07-22 21:57:59,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981846309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403668999] [2022-07-22 21:57:59,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:57:59,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:59,908 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) [2022-07-22 21:57:59,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:58:00,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 21:58:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:00,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 21:58:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:00,493 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 [2022-07-22 21:58:00,535 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 23 treesize of output 7 [2022-07-22 21:58:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:58:00,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:00,575 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_464) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-22 21:58:00,593 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:58:00,594 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 42 treesize of output 42 [2022-07-22 21:58:00,596 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 [2022-07-22 21:58:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 4 not checked. [2022-07-22 21:58:00,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403668999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:00,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:00,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 41 [2022-07-22 21:58:00,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865875289] [2022-07-22 21:58:00,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:00,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 21:58:00,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 21:58:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1451, Unknown=1, NotChecked=76, Total=1640 [2022-07-22 21:58:00,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-22 21:58:00,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 738 transitions, 17704 flow. Second operand has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:00,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:00,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-22 21:58:00,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:05,899 INFO L129 PetriNetUnfolder]: 1596/9925 cut-off events. [2022-07-22 21:58:05,899 INFO L130 PetriNetUnfolder]: For 228129/229163 co-relation queries the response was YES. [2022-07-22 21:58:05,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55756 conditions, 9925 events. 1596/9925 cut-off events. For 228129/229163 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 133271 event pairs, 156 based on Foata normal form. 206/9292 useless extension candidates. Maximal degree in co-relation 55648. Up to 3464 conditions per place. [2022-07-22 21:58:06,011 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 600 selfloop transitions, 192 changer transitions 23/860 dead transitions. [2022-07-22 21:58:06,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 860 transitions, 22147 flow [2022-07-22 21:58:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 21:58:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-22 21:58:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2431 transitions. [2022-07-22 21:58:06,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47112403100775196 [2022-07-22 21:58:06,015 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2431 transitions. [2022-07-22 21:58:06,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2431 transitions. [2022-07-22 21:58:06,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:06,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2431 transitions. [2022-07-22 21:58:06,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 56.53488372093023) internal successors, (2431), 43 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:06,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:06,022 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:06,023 INFO L186 Difference]: Start difference. First operand has 347 places, 738 transitions, 17704 flow. Second operand 43 states and 2431 transitions. [2022-07-22 21:58:06,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 860 transitions, 22147 flow [2022-07-22 21:58:06,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 860 transitions, 21256 flow, removed 422 selfloop flow, removed 30 redundant places. [2022-07-22 21:58:06,889 INFO L242 Difference]: Finished difference. Result has 355 places, 806 transitions, 19492 flow [2022-07-22 21:58:06,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=16875, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=19492, PETRI_PLACES=355, PETRI_TRANSITIONS=806} [2022-07-22 21:58:06,891 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 248 predicate places. [2022-07-22 21:58:06,891 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 806 transitions, 19492 flow [2022-07-22 21:58:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:06,892 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:06,892 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:58:06,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:07,117 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1102779316, now seen corresponding path program 16 times [2022-07-22 21:58:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512193701] [2022-07-22 21:58:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:07,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512193701] [2022-07-22 21:58:07,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512193701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981353608] [2022-07-22 21:58:07,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:58:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:07,772 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) [2022-07-22 21:58:07,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:58:07,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:58:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 21:58:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:07,850 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 [2022-07-22 21:58:07,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:58:07,997 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 [2022-07-22 21:58:08,703 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 [2022-07-22 21:58:08,853 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 [2022-07-22 21:58:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:08,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:09,177 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:58:09,178 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 42 treesize of output 42 [2022-07-22 21:58:09,181 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 [2022-07-22 21:58:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:10,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981353608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:10,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:10,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2022-07-22 21:58:10,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720350983] [2022-07-22 21:58:10,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:10,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 21:58:10,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 21:58:10,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=4133, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 21:58:10,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-22 21:58:10,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 806 transitions, 19492 flow. Second operand has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:10,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:10,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-22 21:58:10,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:20,570 INFO L129 PetriNetUnfolder]: 2723/16382 cut-off events. [2022-07-22 21:58:20,571 INFO L130 PetriNetUnfolder]: For 377159/378448 co-relation queries the response was YES. [2022-07-22 21:58:20,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90372 conditions, 16382 events. 2723/16382 cut-off events. For 377159/378448 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 238058 event pairs, 121 based on Foata normal form. 461/15466 useless extension candidates. Maximal degree in co-relation 90268. Up to 2713 conditions per place. [2022-07-22 21:58:20,783 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 734 selfloop transitions, 616 changer transitions 103/1495 dead transitions. [2022-07-22 21:58:20,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1495 transitions, 38525 flow [2022-07-22 21:58:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-22 21:58:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-22 21:58:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4301 transitions. [2022-07-22 21:58:20,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44248971193415637 [2022-07-22 21:58:20,787 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4301 transitions. [2022-07-22 21:58:20,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4301 transitions. [2022-07-22 21:58:20,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:20,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4301 transitions. [2022-07-22 21:58:20,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 53.098765432098766) internal successors, (4301), 81 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:20,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:20,801 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:20,801 INFO L186 Difference]: Start difference. First operand has 355 places, 806 transitions, 19492 flow. Second operand 81 states and 4301 transitions. [2022-07-22 21:58:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1495 transitions, 38525 flow [2022-07-22 21:58:22,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1495 transitions, 38150 flow, removed 148 selfloop flow, removed 30 redundant places. [2022-07-22 21:58:22,250 INFO L242 Difference]: Finished difference. Result has 447 places, 1087 transitions, 29578 flow [2022-07-22 21:58:22,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=19279, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=29578, PETRI_PLACES=447, PETRI_TRANSITIONS=1087} [2022-07-22 21:58:22,251 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 340 predicate places. [2022-07-22 21:58:22,251 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1087 transitions, 29578 flow [2022-07-22 21:58:22,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:22,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:22,251 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 21:58:22,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:22,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:22,452 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 458708590, now seen corresponding path program 17 times [2022-07-22 21:58:22,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105150932] [2022-07-22 21:58:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:22,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:23,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:23,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105150932] [2022-07-22 21:58:23,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105150932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:23,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547371478] [2022-07-22 21:58:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:58:23,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:23,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:58:23,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:58:23,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 21:58:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:58:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:23,207 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 [2022-07-22 21:58:23,295 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:58:23,296 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 [2022-07-22 21:58:23,603 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 19 treesize of output 21 [2022-07-22 21:58:23,671 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 23 treesize of output 7 [2022-07-22 21:58:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 21:58:23,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:23,716 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_532) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-22 21:58:23,729 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:58:23,730 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 44 treesize of output 44 [2022-07-22 21:58:23,732 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 14 treesize of output 7 [2022-07-22 21:58:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:58:24,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547371478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:24,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:24,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 16] total 43 [2022-07-22 21:58:24,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785401959] [2022-07-22 21:58:24,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:24,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 21:58:24,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 21:58:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1605, Unknown=1, NotChecked=80, Total=1806 [2022-07-22 21:58:24,031 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-22 21:58:24,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1087 transitions, 29578 flow. Second operand has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:24,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:24,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-22 21:58:24,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:34,293 INFO L129 PetriNetUnfolder]: 3628/21792 cut-off events. [2022-07-22 21:58:34,294 INFO L130 PetriNetUnfolder]: For 670482/672384 co-relation queries the response was YES. [2022-07-22 21:58:34,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134037 conditions, 21792 events. 3628/21792 cut-off events. For 670482/672384 co-relation queries the response was YES. Maximal size of possible extension queue 1393. Compared 330613 event pairs, 119 based on Foata normal form. 561/20544 useless extension candidates. Maximal degree in co-relation 133890. Up to 3788 conditions per place. [2022-07-22 21:58:34,688 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 996 selfloop transitions, 635 changer transitions 76/1749 dead transitions. [2022-07-22 21:58:34,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1749 transitions, 49876 flow [2022-07-22 21:58:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 21:58:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-22 21:58:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3172 transitions. [2022-07-22 21:58:34,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44055555555555553 [2022-07-22 21:58:34,691 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3172 transitions. [2022-07-22 21:58:34,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3172 transitions. [2022-07-22 21:58:34,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:34,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3172 transitions. [2022-07-22 21:58:34,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.86666666666667) internal successors, (3172), 60 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:34,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:34,700 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:34,700 INFO L186 Difference]: Start difference. First operand has 447 places, 1087 transitions, 29578 flow. Second operand 60 states and 3172 transitions. [2022-07-22 21:58:34,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1749 transitions, 49876 flow [2022-07-22 21:58:37,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1749 transitions, 47648 flow, removed 1069 selfloop flow, removed 55 redundant places. [2022-07-22 21:58:37,592 INFO L242 Difference]: Finished difference. Result has 454 places, 1336 transitions, 38424 flow [2022-07-22 21:58:37,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=28350, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=38424, PETRI_PLACES=454, PETRI_TRANSITIONS=1336} [2022-07-22 21:58:37,593 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 347 predicate places. [2022-07-22 21:58:37,593 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1336 transitions, 38424 flow [2022-07-22 21:58:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:37,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:37,594 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 21:58:37,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:37,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:37,795 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:58:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash -326418292, now seen corresponding path program 18 times [2022-07-22 21:58:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170721956] [2022-07-22 21:58:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:38,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170721956] [2022-07-22 21:58:38,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170721956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:38,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83677382] [2022-07-22 21:58:38,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:58:38,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:38,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:38,345 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:58:38,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:58:38,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 21:58:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 21:58:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:39,381 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:58:39,382 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 23 treesize of output 10 [2022-07-22 21:58:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:39,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:39,532 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 21:58:39,532 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 25 treesize of output 17 [2022-07-22 21:58:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:58:40,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83677382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:40,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:40,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 54 [2022-07-22 21:58:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504971001] [2022-07-22 21:58:40,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:40,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 21:58:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 21:58:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2523, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 21:58:40,499 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-22 21:58:40,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1336 transitions, 38424 flow. Second operand has 54 states, 54 states have (on average 61.0) internal successors, (3294), 54 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:40,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:40,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-22 21:58:40,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand