./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/pthread-deagle/circular_buffer_bad.i -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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:57:16,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:57:16,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:57:16,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:57:16,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:57:16,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:57:16,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:57:16,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:57:16,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:57:16,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:57:16,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:57:16,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:57:16,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:57:16,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:57:16,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:57:16,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:57:16,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:57:16,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:57:16,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:57:16,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:57:16,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:57:16,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:57:16,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:57:16,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:57:16,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:57:16,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:57:16,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:57:16,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:57:16,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:57:16,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:57:16,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:57:16,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:57:16,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:57:16,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:57:16,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:57:16,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:57:16,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:57:16,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:57:16,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:57:16,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:57:16,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:57:16,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:57:16,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:57:16,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:57:16,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:57:16,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:57:16,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:57:16,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:57:16,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:57:16,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:57:16,824 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:57:16,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:57:16,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:57:16,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:57:16,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:57:16,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:57:16,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:57:16,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:57:16,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:57:16,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:57:16,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:57:16,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:57:16,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:57:16,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:57:16,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:57:16,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:57:16,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:57:16,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:57:16,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:57:16,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:57:16,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:57:16,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:57:16,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:57:16,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:57:16,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:57:16,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:57:16,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2021-12-14 16:57:17,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:57:17,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:57:17,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:57:17,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:57:17,107 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:57:17,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2021-12-14 16:57:17,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff18044bd/8873c69d9dc6423cadd911988d103ac6/FLAG029de2cf4 [2021-12-14 16:57:17,639 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:57:17,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2021-12-14 16:57:17,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff18044bd/8873c69d9dc6423cadd911988d103ac6/FLAG029de2cf4 [2021-12-14 16:57:17,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff18044bd/8873c69d9dc6423cadd911988d103ac6 [2021-12-14 16:57:17,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:57:17,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:57:17,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:57:17,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:57:17,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:57:17,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:57:17" (1/1) ... [2021-12-14 16:57:17,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432a0f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:17, skipping insertion in model container [2021-12-14 16:57:17,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:57:17" (1/1) ... [2021-12-14 16:57:17,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:57:18,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:57:18,304 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/pthread-deagle/circular_buffer_bad.i[30440,30453] [2021-12-14 16:57:18,320 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/pthread-deagle/circular_buffer_bad.i[30895,30908] [2021-12-14 16:57:18,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:57:18,342 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:57:18,380 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/pthread-deagle/circular_buffer_bad.i[30440,30453] [2021-12-14 16:57:18,385 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/pthread-deagle/circular_buffer_bad.i[30895,30908] [2021-12-14 16:57:18,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:57:18,434 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:57:18,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18 WrapperNode [2021-12-14 16:57:18,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:57:18,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:57:18,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:57:18,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:57:18,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,514 INFO L137 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2021-12-14 16:57:18,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:57:18,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:57:18,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:57:18,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:57:18,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:57:18,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:57:18,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:57:18,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:57:18,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (1/1) ... [2021-12-14 16:57:18,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:57:18,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:18,625 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) [2021-12-14 16:57:18,631 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 [2021-12-14 16:57:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:57:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-12-14 16:57:18,653 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-12-14 16:57:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-12-14 16:57:18,654 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-12-14 16:57:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:57:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-12-14 16:57:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:57:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:57:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:57:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 16:57:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:57:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:57:18,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:57:18,656 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:57:18,762 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:57:18,763 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:57:19,019 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:57:19,027 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:57:19,028 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:57:19,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:57:19 BoogieIcfgContainer [2021-12-14 16:57:19,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:57:19,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:57:19,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:57:19,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:57:19,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:57:17" (1/3) ... [2021-12-14 16:57:19,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e301a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:57:19, skipping insertion in model container [2021-12-14 16:57:19,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:18" (2/3) ... [2021-12-14 16:57:19,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e301a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:57:19, skipping insertion in model container [2021-12-14 16:57:19,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:57:19" (3/3) ... [2021-12-14 16:57:19,056 INFO L111 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2021-12-14 16:57:19,060 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:57:19,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:57:19,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:57:19,070 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:57:19,103 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,103 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,103 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,103 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,104 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,104 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,104 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,104 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,105 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,105 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,105 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,105 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,105 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,106 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,106 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,106 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,106 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,106 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,107 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,107 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,107 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,107 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,110 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,114 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,114 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,114 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,114 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,115 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,115 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,115 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,115 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,115 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,116 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,116 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,116 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,117 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,117 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,117 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,117 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,117 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,118 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,119 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,119 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,119 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,120 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,120 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,120 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,121 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,122 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,122 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,122 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,123 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,123 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,123 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,123 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,123 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,124 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,124 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,124 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,124 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,125 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,125 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,125 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,125 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,125 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,126 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,126 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,126 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,126 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,127 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,127 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,127 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,127 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,128 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,128 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,128 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,128 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,128 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,129 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,129 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,129 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,129 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,129 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,131 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,131 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,131 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,131 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,131 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,132 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,132 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,132 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,132 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,132 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,133 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,133 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,133 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,133 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,133 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,134 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,134 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,134 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,134 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,134 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,135 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,135 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,135 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,135 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,135 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,136 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,136 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,136 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,136 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,136 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,136 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,137 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,137 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,137 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,140 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,140 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,141 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,141 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,141 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,142 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,142 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_insertLogElement_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,142 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,142 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,142 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,143 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,144 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~nondet7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_removeLogElement_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,145 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~ret8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:19,147 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:57:19,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:57:19,193 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:57:19,194 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-14 16:57:19,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 316 flow [2021-12-14 16:57:19,262 INFO L129 PetriNetUnfolder]: 10/148 cut-off events. [2021-12-14 16:57:19,263 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:57:19,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 10/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 257 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2021-12-14 16:57:19,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 316 flow [2021-12-14 16:57:19,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 138 transitions, 285 flow [2021-12-14 16:57:19,295 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2021-12-14 16:57:19,295 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-14 16:57:19,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:19,296 INFO L254 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] [2021-12-14 16:57:19,297 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1386578492, now seen corresponding path program 1 times [2021-12-14 16:57:19,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231737427] [2021-12-14 16:57:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:19,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:19,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956123537] [2021-12-14 16:57:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:19,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:19,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:19,511 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) [2021-12-14 16:57:19,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:57:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:57:19,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:20,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:20,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:20,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231737427] [2021-12-14 16:57:20,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:20,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956123537] [2021-12-14 16:57:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956123537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:20,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:57:20,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365765719] [2021-12-14 16:57:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:20,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:57:20,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:57:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:57:20,156 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 150 [2021-12-14 16:57:20,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 138 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:20,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 150 [2021-12-14 16:57:20,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:20,295 INFO L129 PetriNetUnfolder]: 34/287 cut-off events. [2021-12-14 16:57:20,295 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-14 16:57:20,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 287 events. 34/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1145 event pairs, 8 based on Foata normal form. 20/279 useless extension candidates. Maximal degree in co-relation 283. Up to 32 conditions per place. [2021-12-14 16:57:20,304 INFO L132 encePairwiseOnDemand]: 140/150 looper letters, 15 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2021-12-14 16:57:20,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 137 transitions, 333 flow [2021-12-14 16:57:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:57:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:57:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2021-12-14 16:57:20,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8983333333333333 [2021-12-14 16:57:20,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2021-12-14 16:57:20,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2021-12-14 16:57:20,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:20,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2021-12-14 16:57:20,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,333 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,334 INFO L186 Difference]: Start difference. First operand has 135 places, 138 transitions, 285 flow. Second operand 4 states and 539 transitions. [2021-12-14 16:57:20,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 137 transitions, 333 flow [2021-12-14 16:57:20,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 137 transitions, 326 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-14 16:57:20,340 INFO L242 Difference]: Finished difference. Result has 132 places, 134 transitions, 299 flow [2021-12-14 16:57:20,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=299, PETRI_PLACES=132, PETRI_TRANSITIONS=134} [2021-12-14 16:57:20,345 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, -3 predicate places. [2021-12-14 16:57:20,345 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 134 transitions, 299 flow [2021-12-14 16:57:20,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:20,346 INFO L254 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] [2021-12-14 16:57:20,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:20,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-14 16:57:20,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:20,570 INFO L85 PathProgramCache]: Analyzing trace with hash 204627122, now seen corresponding path program 1 times [2021-12-14 16:57:20,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:20,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464386757] [2021-12-14 16:57:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:20,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:20,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464386757] [2021-12-14 16:57:20,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464386757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:20,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:20,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:20,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896748104] [2021-12-14 16:57:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:20,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:20,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:20,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 150 [2021-12-14 16:57:20,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 134 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:20,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 150 [2021-12-14 16:57:20,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:20,843 INFO L129 PetriNetUnfolder]: 47/421 cut-off events. [2021-12-14 16:57:20,844 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-12-14 16:57:20,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 421 events. 47/421 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1544 event pairs, 5 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 333. Up to 27 conditions per place. [2021-12-14 16:57:20,848 INFO L132 encePairwiseOnDemand]: 146/150 looper letters, 12 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2021-12-14 16:57:20,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 139 transitions, 349 flow [2021-12-14 16:57:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-12-14 16:57:20,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9244444444444444 [2021-12-14 16:57:20,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-12-14 16:57:20,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-12-14 16:57:20,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:20,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-12-14 16:57:20,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 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) [2021-12-14 16:57:20,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 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) [2021-12-14 16:57:20,856 INFO L186 Difference]: Start difference. First operand has 132 places, 134 transitions, 299 flow. Second operand 3 states and 416 transitions. [2021-12-14 16:57:20,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 139 transitions, 349 flow [2021-12-14 16:57:20,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 139 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:20,864 INFO L242 Difference]: Finished difference. Result has 134 places, 135 transitions, 311 flow [2021-12-14 16:57:20,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=134, PETRI_TRANSITIONS=135} [2021-12-14 16:57:20,865 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, -1 predicate places. [2021-12-14 16:57:20,865 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 135 transitions, 311 flow [2021-12-14 16:57:20,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:20,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:20,867 INFO L254 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] [2021-12-14 16:57:20,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:57:20,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2135003898, now seen corresponding path program 1 times [2021-12-14 16:57:20,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:20,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436640502] [2021-12-14 16:57:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:20,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:20,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:20,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436640502] [2021-12-14 16:57:20,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436640502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:20,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:20,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:20,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226371072] [2021-12-14 16:57:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:20,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:20,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:21,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 150 [2021-12-14 16:57:21,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 135 transitions, 311 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:21,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 150 [2021-12-14 16:57:21,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:21,073 INFO L129 PetriNetUnfolder]: 37/365 cut-off events. [2021-12-14 16:57:21,073 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2021-12-14 16:57:21,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 365 events. 37/365 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1376 event pairs, 6 based on Foata normal form. 7/347 useless extension candidates. Maximal degree in co-relation 280. Up to 32 conditions per place. [2021-12-14 16:57:21,077 INFO L132 encePairwiseOnDemand]: 146/150 looper letters, 16 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2021-12-14 16:57:21,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 135 transitions, 350 flow [2021-12-14 16:57:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2021-12-14 16:57:21,079 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8866666666666667 [2021-12-14 16:57:21,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2021-12-14 16:57:21,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2021-12-14 16:57:21,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:21,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2021-12-14 16:57:21,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 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) [2021-12-14 16:57:21,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 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) [2021-12-14 16:57:21,082 INFO L186 Difference]: Start difference. First operand has 134 places, 135 transitions, 311 flow. Second operand 3 states and 399 transitions. [2021-12-14 16:57:21,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 135 transitions, 350 flow [2021-12-14 16:57:21,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 343 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:21,095 INFO L242 Difference]: Finished difference. Result has 135 places, 133 transitions, 302 flow [2021-12-14 16:57:21,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=135, PETRI_TRANSITIONS=133} [2021-12-14 16:57:21,099 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2021-12-14 16:57:21,100 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 133 transitions, 302 flow [2021-12-14 16:57:21,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:21,103 INFO L254 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] [2021-12-14 16:57:21,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:57:21,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash -570377209, now seen corresponding path program 1 times [2021-12-14 16:57:21,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:21,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354348275] [2021-12-14 16:57:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:21,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:21,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:21,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354348275] [2021-12-14 16:57:21,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354348275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:21,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:21,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:57:21,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963484448] [2021-12-14 16:57:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:21,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:57:21,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:57:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:57:21,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 150 [2021-12-14 16:57:21,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 133 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:21,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 150 [2021-12-14 16:57:21,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:21,443 INFO L129 PetriNetUnfolder]: 32/374 cut-off events. [2021-12-14 16:57:21,444 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-12-14 16:57:21,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 374 events. 32/374 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1332 event pairs, 6 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 219. Up to 43 conditions per place. [2021-12-14 16:57:21,446 INFO L132 encePairwiseOnDemand]: 144/150 looper letters, 20 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2021-12-14 16:57:21,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 138 transitions, 371 flow [2021-12-14 16:57:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:57:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:57:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 768 transitions. [2021-12-14 16:57:21,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2021-12-14 16:57:21,449 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 768 transitions. [2021-12-14 16:57:21,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 768 transitions. [2021-12-14 16:57:21,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:21,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 768 transitions. [2021-12-14 16:57:21,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,454 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,454 INFO L186 Difference]: Start difference. First operand has 135 places, 133 transitions, 302 flow. Second operand 6 states and 768 transitions. [2021-12-14 16:57:21,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 138 transitions, 371 flow [2021-12-14 16:57:21,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:21,458 INFO L242 Difference]: Finished difference. Result has 140 places, 134 transitions, 319 flow [2021-12-14 16:57:21,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=140, PETRI_TRANSITIONS=134} [2021-12-14 16:57:21,459 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 5 predicate places. [2021-12-14 16:57:21,459 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 134 transitions, 319 flow [2021-12-14 16:57:21,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:21,460 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:21,460 INFO L254 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] [2021-12-14 16:57:21,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:57:21,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1847670715, now seen corresponding path program 1 times [2021-12-14 16:57:21,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289831554] [2021-12-14 16:57:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:21,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:21,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:21,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926626983] [2021-12-14 16:57:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:21,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:21,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:21,480 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) [2021-12-14 16:57:21,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:57:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 16:57:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:22,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:22,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289831554] [2021-12-14 16:57:22,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926626983] [2021-12-14 16:57:22,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926626983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:22,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:22,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:57:22,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940626607] [2021-12-14 16:57:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:22,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:57:22,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:57:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:57:22,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 150 [2021-12-14 16:57:22,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 134 transitions, 319 flow. Second operand has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:22,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:22,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 150 [2021-12-14 16:57:22,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:22,436 INFO L129 PetriNetUnfolder]: 45/469 cut-off events. [2021-12-14 16:57:22,436 INFO L130 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2021-12-14 16:57:22,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 469 events. 45/469 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1919 event pairs, 10 based on Foata normal form. 3/441 useless extension candidates. Maximal degree in co-relation 260. Up to 49 conditions per place. [2021-12-14 16:57:22,440 INFO L132 encePairwiseOnDemand]: 141/150 looper letters, 32 selfloop transitions, 8 changer transitions 0/149 dead transitions. [2021-12-14 16:57:22,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 149 transitions, 454 flow [2021-12-14 16:57:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:57:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:57:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 998 transitions. [2021-12-14 16:57:22,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8316666666666667 [2021-12-14 16:57:22,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 998 transitions. [2021-12-14 16:57:22,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 998 transitions. [2021-12-14 16:57:22,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:22,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 998 transitions. [2021-12-14 16:57:22,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.75) internal successors, (998), 8 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:22,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:22,450 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:22,450 INFO L186 Difference]: Start difference. First operand has 140 places, 134 transitions, 319 flow. Second operand 8 states and 998 transitions. [2021-12-14 16:57:22,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 149 transitions, 454 flow [2021-12-14 16:57:22,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:57:22,455 INFO L242 Difference]: Finished difference. Result has 144 places, 136 transitions, 347 flow [2021-12-14 16:57:22,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=347, PETRI_PLACES=144, PETRI_TRANSITIONS=136} [2021-12-14 16:57:22,456 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 9 predicate places. [2021-12-14 16:57:22,456 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 347 flow [2021-12-14 16:57:22,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:22,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:22,457 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:22,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:22,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:22,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:22,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1611186747, now seen corresponding path program 1 times [2021-12-14 16:57:22,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:22,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176473937] [2021-12-14 16:57:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:22,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:22,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:22,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29327632] [2021-12-14 16:57:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:22,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:22,698 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) [2021-12-14 16:57:22,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:57:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:22,956 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:23,125 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:23,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:23,151 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:23,151 INFO L388 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 [2021-12-14 16:57:23,293 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:23,505 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:23,915 INFO L388 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 59 treesize of output 53 [2021-12-14 16:57:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:24,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:24,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176473937] [2021-12-14 16:57:24,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29327632] [2021-12-14 16:57:24,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29327632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:24,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:24,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 16:57:24,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785926635] [2021-12-14 16:57:24,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:24,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 16:57:24,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:24,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 16:57:24,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:57:24,550 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:24,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 136 transitions, 347 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:24,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:24,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:24,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:25,489 INFO L129 PetriNetUnfolder]: 1829/4630 cut-off events. [2021-12-14 16:57:25,490 INFO L130 PetriNetUnfolder]: For 622/622 co-relation queries the response was YES. [2021-12-14 16:57:25,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8308 conditions, 4630 events. 1829/4630 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 34078 event pairs, 527 based on Foata normal form. 0/4112 useless extension candidates. Maximal degree in co-relation 4244. Up to 1605 conditions per place. [2021-12-14 16:57:25,551 INFO L132 encePairwiseOnDemand]: 125/150 looper letters, 161 selfloop transitions, 54 changer transitions 21/315 dead transitions. [2021-12-14 16:57:25,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 315 transitions, 1215 flow [2021-12-14 16:57:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 16:57:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-14 16:57:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2146 transitions. [2021-12-14 16:57:25,558 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220289855072464 [2021-12-14 16:57:25,558 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2146 transitions. [2021-12-14 16:57:25,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2146 transitions. [2021-12-14 16:57:25,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:25,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2146 transitions. [2021-12-14 16:57:25,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.30434782608695) internal successors, (2146), 23 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:25,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:25,570 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:25,570 INFO L186 Difference]: Start difference. First operand has 144 places, 136 transitions, 347 flow. Second operand 23 states and 2146 transitions. [2021-12-14 16:57:25,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 315 transitions, 1215 flow [2021-12-14 16:57:25,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 315 transitions, 1200 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-12-14 16:57:25,577 INFO L242 Difference]: Finished difference. Result has 176 places, 186 transitions, 685 flow [2021-12-14 16:57:25,577 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=685, PETRI_PLACES=176, PETRI_TRANSITIONS=186} [2021-12-14 16:57:25,578 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 41 predicate places. [2021-12-14 16:57:25,578 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 186 transitions, 685 flow [2021-12-14 16:57:25,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:25,579 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:25,579 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:25,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:25,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:25,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -176387097, now seen corresponding path program 2 times [2021-12-14 16:57:25,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:25,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565396834] [2021-12-14 16:57:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:25,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:25,814 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:25,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063073128] [2021-12-14 16:57:25,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:57:25,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:25,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:25,816 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) [2021-12-14 16:57:25,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:57:26,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 16:57:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:57:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:26,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:26,095 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:26,271 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:26,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:26,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:26,302 INFO L388 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 [2021-12-14 16:57:26,458 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:26,562 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:26,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:27,080 INFO L388 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 59 treesize of output 53 [2021-12-14 16:57:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:27,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:27,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565396834] [2021-12-14 16:57:27,674 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063073128] [2021-12-14 16:57:27,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063073128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:27,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:27,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 16:57:27,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859273626] [2021-12-14 16:57:27,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:27,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 16:57:27,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:27,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 16:57:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:57:27,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:27,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 186 transitions, 685 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:27,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:27,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:27,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:28,993 INFO L129 PetriNetUnfolder]: 2538/6846 cut-off events. [2021-12-14 16:57:28,993 INFO L130 PetriNetUnfolder]: For 6681/6713 co-relation queries the response was YES. [2021-12-14 16:57:29,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 6846 events. 2538/6846 cut-off events. For 6681/6713 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 55900 event pairs, 597 based on Foata normal form. 20/6435 useless extension candidates. Maximal degree in co-relation 13950. Up to 1124 conditions per place. [2021-12-14 16:57:29,065 INFO L132 encePairwiseOnDemand]: 130/150 looper letters, 225 selfloop transitions, 64 changer transitions 11/379 dead transitions. [2021-12-14 16:57:29,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 379 transitions, 2147 flow [2021-12-14 16:57:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:57:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:57:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1897 transitions. [2021-12-14 16:57:29,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6323333333333333 [2021-12-14 16:57:29,071 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1897 transitions. [2021-12-14 16:57:29,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1897 transitions. [2021-12-14 16:57:29,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:29,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1897 transitions. [2021-12-14 16:57:29,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.85) internal successors, (1897), 20 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:29,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:29,085 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:29,085 INFO L186 Difference]: Start difference. First operand has 176 places, 186 transitions, 685 flow. Second operand 20 states and 1897 transitions. [2021-12-14 16:57:29,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 379 transitions, 2147 flow [2021-12-14 16:57:29,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 379 transitions, 2139 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:57:29,123 INFO L242 Difference]: Finished difference. Result has 203 places, 219 transitions, 1131 flow [2021-12-14 16:57:29,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1131, PETRI_PLACES=203, PETRI_TRANSITIONS=219} [2021-12-14 16:57:29,125 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 68 predicate places. [2021-12-14 16:57:29,125 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 219 transitions, 1131 flow [2021-12-14 16:57:29,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:29,126 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:29,126 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:29,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:29,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:29,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:29,340 INFO L85 PathProgramCache]: Analyzing trace with hash 696162917, now seen corresponding path program 3 times [2021-12-14 16:57:29,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:29,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168928034] [2021-12-14 16:57:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:29,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:29,356 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:29,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849473435] [2021-12-14 16:57:29,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:57:29,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:29,358 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) [2021-12-14 16:57:29,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:57:29,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-14 16:57:29,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:57:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:29,658 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:29,842 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:29,877 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:29,877 INFO L388 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 [2021-12-14 16:57:30,027 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:30,076 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:30,589 INFO L388 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 59 treesize of output 53 [2021-12-14 16:57:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:31,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:31,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168928034] [2021-12-14 16:57:31,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849473435] [2021-12-14 16:57:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849473435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:31,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:31,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 16:57:31,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281748506] [2021-12-14 16:57:31,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:31,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 16:57:31,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 16:57:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:57:31,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:31,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 219 transitions, 1131 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:31,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:31,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:31,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:33,181 INFO L129 PetriNetUnfolder]: 3723/9998 cut-off events. [2021-12-14 16:57:33,182 INFO L130 PetriNetUnfolder]: For 25946/26004 co-relation queries the response was YES. [2021-12-14 16:57:33,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29343 conditions, 9998 events. 3723/9998 cut-off events. For 25946/26004 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 86024 event pairs, 1362 based on Foata normal form. 3/9384 useless extension candidates. Maximal degree in co-relation 23906. Up to 3307 conditions per place. [2021-12-14 16:57:33,276 INFO L132 encePairwiseOnDemand]: 128/150 looper letters, 268 selfloop transitions, 56 changer transitions 3/406 dead transitions. [2021-12-14 16:57:33,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 406 transitions, 2910 flow [2021-12-14 16:57:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:57:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:57:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1890 transitions. [2021-12-14 16:57:33,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.63 [2021-12-14 16:57:33,281 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1890 transitions. [2021-12-14 16:57:33,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1890 transitions. [2021-12-14 16:57:33,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:33,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1890 transitions. [2021-12-14 16:57:33,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.5) internal successors, (1890), 20 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:33,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:33,292 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:33,292 INFO L186 Difference]: Start difference. First operand has 203 places, 219 transitions, 1131 flow. Second operand 20 states and 1890 transitions. [2021-12-14 16:57:33,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 406 transitions, 2910 flow [2021-12-14 16:57:33,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 406 transitions, 2832 flow, removed 36 selfloop flow, removed 3 redundant places. [2021-12-14 16:57:33,357 INFO L242 Difference]: Finished difference. Result has 232 places, 257 transitions, 1682 flow [2021-12-14 16:57:33,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1682, PETRI_PLACES=232, PETRI_TRANSITIONS=257} [2021-12-14 16:57:33,360 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 97 predicate places. [2021-12-14 16:57:33,360 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 257 transitions, 1682 flow [2021-12-14 16:57:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:33,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:33,362 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:33,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:33,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:33,586 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1697750481, now seen corresponding path program 4 times [2021-12-14 16:57:33,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627840001] [2021-12-14 16:57:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:33,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:33,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277453264] [2021-12-14 16:57:33,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:57:33,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:33,605 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) [2021-12-14 16:57:33,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:57:33,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:57:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:57:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 16:57:33,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:33,981 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:34,118 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:34,158 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-14 16:57:34,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 16:57:34,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-14 16:57:34,374 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:34,873 INFO L388 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 59 treesize of output 53 [2021-12-14 16:57:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:35,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:35,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:35,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627840001] [2021-12-14 16:57:35,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:35,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277453264] [2021-12-14 16:57:35,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277453264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:35,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:35,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 16:57:35,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203347201] [2021-12-14 16:57:35,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 16:57:35,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 16:57:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:57:35,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:35,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 257 transitions, 1682 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:35,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:35,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:35,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:37,974 INFO L129 PetriNetUnfolder]: 5193/13985 cut-off events. [2021-12-14 16:57:37,974 INFO L130 PetriNetUnfolder]: For 58432/58492 co-relation queries the response was YES. [2021-12-14 16:57:38,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46048 conditions, 13985 events. 5193/13985 cut-off events. For 58432/58492 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 129644 event pairs, 1804 based on Foata normal form. 26/13263 useless extension candidates. Maximal degree in co-relation 42229. Up to 5296 conditions per place. [2021-12-14 16:57:38,121 INFO L132 encePairwiseOnDemand]: 129/150 looper letters, 316 selfloop transitions, 73 changer transitions 8/476 dead transitions. [2021-12-14 16:57:38,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 476 transitions, 4168 flow [2021-12-14 16:57:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:57:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:57:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1913 transitions. [2021-12-14 16:57:38,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6376666666666667 [2021-12-14 16:57:38,128 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1913 transitions. [2021-12-14 16:57:38,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1913 transitions. [2021-12-14 16:57:38,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:38,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1913 transitions. [2021-12-14 16:57:38,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 95.65) internal successors, (1913), 20 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:38,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:38,141 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:38,141 INFO L186 Difference]: Start difference. First operand has 232 places, 257 transitions, 1682 flow. Second operand 20 states and 1913 transitions. [2021-12-14 16:57:38,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 476 transitions, 4168 flow [2021-12-14 16:57:38,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 476 transitions, 4022 flow, removed 63 selfloop flow, removed 5 redundant places. [2021-12-14 16:57:38,329 INFO L242 Difference]: Finished difference. Result has 259 places, 312 transitions, 2508 flow [2021-12-14 16:57:38,329 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2508, PETRI_PLACES=259, PETRI_TRANSITIONS=312} [2021-12-14 16:57:38,330 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 124 predicate places. [2021-12-14 16:57:38,330 INFO L470 AbstractCegarLoop]: Abstraction has has 259 places, 312 transitions, 2508 flow [2021-12-14 16:57:38,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:38,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:38,331 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:38,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:38,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:38,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1549328667, now seen corresponding path program 5 times [2021-12-14 16:57:38,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:38,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549477893] [2021-12-14 16:57:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:38,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:38,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802589901] [2021-12-14 16:57:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:57:38,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:38,576 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) [2021-12-14 16:57:38,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:57:38,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 16:57:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:57:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:38,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:38,787 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:38,943 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:38,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:38,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:38,971 INFO L388 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 [2021-12-14 16:57:39,090 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:39,145 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:39,530 INFO L388 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 51 treesize of output 45 [2021-12-14 16:57:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:39,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:39,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549477893] [2021-12-14 16:57:39,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802589901] [2021-12-14 16:57:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802589901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:39,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:39,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-14 16:57:39,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476992604] [2021-12-14 16:57:39,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:39,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 16:57:39,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 16:57:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:57:39,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:39,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 312 transitions, 2508 flow. Second operand has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:39,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:39,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:39,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:42,812 INFO L129 PetriNetUnfolder]: 6277/16839 cut-off events. [2021-12-14 16:57:42,812 INFO L130 PetriNetUnfolder]: For 95776/95868 co-relation queries the response was YES. [2021-12-14 16:57:42,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62568 conditions, 16839 events. 6277/16839 cut-off events. For 95776/95868 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 162889 event pairs, 2478 based on Foata normal form. 32/15922 useless extension candidates. Maximal degree in co-relation 59787. Up to 7350 conditions per place. [2021-12-14 16:57:43,022 INFO L132 encePairwiseOnDemand]: 126/150 looper letters, 325 selfloop transitions, 96 changer transitions 7/507 dead transitions. [2021-12-14 16:57:43,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 507 transitions, 5225 flow [2021-12-14 16:57:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:57:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-14 16:57:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2047 transitions. [2021-12-14 16:57:43,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6203030303030304 [2021-12-14 16:57:43,025 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2047 transitions. [2021-12-14 16:57:43,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2047 transitions. [2021-12-14 16:57:43,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:43,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2047 transitions. [2021-12-14 16:57:43,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 93.04545454545455) internal successors, (2047), 22 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:43,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 150.0) internal successors, (3450), 23 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:43,034 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 150.0) internal successors, (3450), 23 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:43,034 INFO L186 Difference]: Start difference. First operand has 259 places, 312 transitions, 2508 flow. Second operand 22 states and 2047 transitions. [2021-12-14 16:57:43,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 507 transitions, 5225 flow [2021-12-14 16:57:43,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 507 transitions, 4958 flow, removed 131 selfloop flow, removed 3 redundant places. [2021-12-14 16:57:43,338 INFO L242 Difference]: Finished difference. Result has 292 places, 383 transitions, 3657 flow [2021-12-14 16:57:43,339 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3657, PETRI_PLACES=292, PETRI_TRANSITIONS=383} [2021-12-14 16:57:43,340 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 157 predicate places. [2021-12-14 16:57:43,340 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 383 transitions, 3657 flow [2021-12-14 16:57:43,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:43,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:43,347 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:43,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:43,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:43,563 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 848285264, now seen corresponding path program 1 times [2021-12-14 16:57:43,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:43,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494282639] [2021-12-14 16:57:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:43,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:43,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:43,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264903211] [2021-12-14 16:57:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:43,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:43,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:43,592 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) [2021-12-14 16:57:43,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:57:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:43,785 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:43,928 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:43,958 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:43,959 INFO L388 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 [2021-12-14 16:57:44,094 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:44,156 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:44,725 INFO L388 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 59 treesize of output 53 [2021-12-14 16:57:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:45,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:45,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494282639] [2021-12-14 16:57:45,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:45,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264903211] [2021-12-14 16:57:45,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264903211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:45,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:45,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 16:57:45,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642751486] [2021-12-14 16:57:45,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:45,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 16:57:45,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 16:57:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:57:45,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:45,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 383 transitions, 3657 flow. Second operand has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:45,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:45,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:45,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:48,745 INFO L129 PetriNetUnfolder]: 6445/17186 cut-off events. [2021-12-14 16:57:48,745 INFO L130 PetriNetUnfolder]: For 153201/153347 co-relation queries the response was YES. [2021-12-14 16:57:49,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73574 conditions, 17186 events. 6445/17186 cut-off events. For 153201/153347 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 166388 event pairs, 2378 based on Foata normal form. 26/16264 useless extension candidates. Maximal degree in co-relation 70386. Up to 8086 conditions per place. [2021-12-14 16:57:49,171 INFO L132 encePairwiseOnDemand]: 127/150 looper letters, 327 selfloop transitions, 102 changer transitions 3/511 dead transitions. [2021-12-14 16:57:49,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 511 transitions, 5578 flow [2021-12-14 16:57:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 16:57:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-14 16:57:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1762 transitions. [2021-12-14 16:57:49,179 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6182456140350877 [2021-12-14 16:57:49,179 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1762 transitions. [2021-12-14 16:57:49,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1762 transitions. [2021-12-14 16:57:49,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:49,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1762 transitions. [2021-12-14 16:57:49,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.73684210526316) internal successors, (1762), 19 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:49,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:49,187 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:49,187 INFO L186 Difference]: Start difference. First operand has 292 places, 383 transitions, 3657 flow. Second operand 19 states and 1762 transitions. [2021-12-14 16:57:49,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 511 transitions, 5578 flow [2021-12-14 16:57:49,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 511 transitions, 5167 flow, removed 202 selfloop flow, removed 4 redundant places. [2021-12-14 16:57:49,604 INFO L242 Difference]: Finished difference. Result has 314 places, 423 transitions, 3983 flow [2021-12-14 16:57:49,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3983, PETRI_PLACES=314, PETRI_TRANSITIONS=423} [2021-12-14 16:57:49,604 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 179 predicate places. [2021-12-14 16:57:49,605 INFO L470 AbstractCegarLoop]: Abstraction has has 314 places, 423 transitions, 3983 flow [2021-12-14 16:57:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:49,605 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:49,605 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:49,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:49,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 16:57:49,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash -838311545, now seen corresponding path program 1 times [2021-12-14 16:57:49,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:49,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401737978] [2021-12-14 16:57:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:49,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:49,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:49,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241463759] [2021-12-14 16:57:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:49,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:49,823 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) [2021-12-14 16:57:49,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 16:57:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:50,136 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:50,262 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:50,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:50,288 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:50,288 INFO L388 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 [2021-12-14 16:57:50,399 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:50,449 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:50,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:50,932 INFO L388 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 59 treesize of output 53 [2021-12-14 16:57:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:51,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:51,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:51,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401737978] [2021-12-14 16:57:51,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:51,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241463759] [2021-12-14 16:57:51,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241463759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:51,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:51,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 16:57:51,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476687505] [2021-12-14 16:57:51,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:51,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 16:57:51,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 16:57:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:57:51,750 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:51,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 423 transitions, 3983 flow. Second operand has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:51,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:51,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:51,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:55,787 INFO L129 PetriNetUnfolder]: 7237/19396 cut-off events. [2021-12-14 16:57:55,787 INFO L130 PetriNetUnfolder]: For 281475/281848 co-relation queries the response was YES. [2021-12-14 16:57:56,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99366 conditions, 19396 events. 7237/19396 cut-off events. For 281475/281848 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 191360 event pairs, 2879 based on Foata normal form. 40/18414 useless extension candidates. Maximal degree in co-relation 97057. Up to 6876 conditions per place. [2021-12-14 16:57:56,340 INFO L132 encePairwiseOnDemand]: 130/150 looper letters, 410 selfloop transitions, 125 changer transitions 0/614 dead transitions. [2021-12-14 16:57:56,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 614 transitions, 7310 flow [2021-12-14 16:57:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:57:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-14 16:57:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1889 transitions. [2021-12-14 16:57:56,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6296666666666667 [2021-12-14 16:57:56,343 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1889 transitions. [2021-12-14 16:57:56,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1889 transitions. [2021-12-14 16:57:56,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:56,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1889 transitions. [2021-12-14 16:57:56,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.45) internal successors, (1889), 20 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:56,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:56,351 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:56,351 INFO L186 Difference]: Start difference. First operand has 314 places, 423 transitions, 3983 flow. Second operand 20 states and 1889 transitions. [2021-12-14 16:57:56,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 614 transitions, 7310 flow [2021-12-14 16:57:56,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 614 transitions, 6955 flow, removed 142 selfloop flow, removed 8 redundant places. [2021-12-14 16:57:56,972 INFO L242 Difference]: Finished difference. Result has 335 places, 464 transitions, 4820 flow [2021-12-14 16:57:56,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4820, PETRI_PLACES=335, PETRI_TRANSITIONS=464} [2021-12-14 16:57:56,974 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 200 predicate places. [2021-12-14 16:57:56,974 INFO L470 AbstractCegarLoop]: Abstraction has has 335 places, 464 transitions, 4820 flow [2021-12-14 16:57:56,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:56,975 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:56,975 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:56,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-14 16:57:57,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:57,184 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:57:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1389769095, now seen corresponding path program 2 times [2021-12-14 16:57:57,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:57,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265010900] [2021-12-14 16:57:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:57,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:57,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:57:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769224493] [2021-12-14 16:57:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:57:57,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:57,213 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) [2021-12-14 16:57:57,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 16:57:57,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 16:57:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:57:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:57:57,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:57,599 INFO L388 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 7 treesize of output 6 [2021-12-14 16:57:57,732 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:57:57,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:57:57,758 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:57:57,758 INFO L388 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 [2021-12-14 16:57:57,871 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:57,920 INFO L388 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 13 treesize of output 15 [2021-12-14 16:57:58,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:57:58,236 INFO L388 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 51 treesize of output 45 [2021-12-14 16:57:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:58,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:57:58,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265010900] [2021-12-14 16:57:58,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:57:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769224493] [2021-12-14 16:57:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769224493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:58,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:58,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-14 16:57:58,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972527010] [2021-12-14 16:57:58,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 16:57:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 16:57:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:57:58,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:57:58,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 464 transitions, 4820 flow. Second operand has 16 states, 16 states have (on average 85.8125) internal successors, (1373), 16 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:58,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:58,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:57:58,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:02,977 INFO L129 PetriNetUnfolder]: 7393/19698 cut-off events. [2021-12-14 16:58:02,977 INFO L130 PetriNetUnfolder]: For 404353/404713 co-relation queries the response was YES. [2021-12-14 16:58:03,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111482 conditions, 19698 events. 7393/19698 cut-off events. For 404353/404713 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 194539 event pairs, 2821 based on Foata normal form. 27/18674 useless extension candidates. Maximal degree in co-relation 108905. Up to 9764 conditions per place. [2021-12-14 16:58:03,371 INFO L132 encePairwiseOnDemand]: 129/150 looper letters, 409 selfloop transitions, 90 changer transitions 7/585 dead transitions. [2021-12-14 16:58:03,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 585 transitions, 7345 flow [2021-12-14 16:58:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:58:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:58:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1584 transitions. [2021-12-14 16:58:03,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6211764705882353 [2021-12-14 16:58:03,375 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1584 transitions. [2021-12-14 16:58:03,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1584 transitions. [2021-12-14 16:58:03,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:03,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1584 transitions. [2021-12-14 16:58:03,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.17647058823529) internal successors, (1584), 17 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:03,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:03,381 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:03,381 INFO L186 Difference]: Start difference. First operand has 335 places, 464 transitions, 4820 flow. Second operand 17 states and 1584 transitions. [2021-12-14 16:58:03,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 585 transitions, 7345 flow [2021-12-14 16:58:04,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 585 transitions, 7073 flow, removed 109 selfloop flow, removed 7 redundant places. [2021-12-14 16:58:04,137 INFO L242 Difference]: Finished difference. Result has 348 places, 483 transitions, 5032 flow [2021-12-14 16:58:04,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5032, PETRI_PLACES=348, PETRI_TRANSITIONS=483} [2021-12-14 16:58:04,138 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 213 predicate places. [2021-12-14 16:58:04,138 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 483 transitions, 5032 flow [2021-12-14 16:58:04,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.8125) internal successors, (1373), 16 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:04,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:04,139 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:04,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:04,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 16:58:04,355 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:58:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1203170670, now seen corresponding path program 1 times [2021-12-14 16:58:04,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:04,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208764025] [2021-12-14 16:58:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:04,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:04,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:58:04,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123863676] [2021-12-14 16:58:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:04,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:04,377 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) [2021-12-14 16:58:04,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 16:58:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 16:58:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:04,696 INFO L388 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 7 treesize of output 6 [2021-12-14 16:58:04,828 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:58:04,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:58:04,850 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:58:04,851 INFO L388 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 [2021-12-14 16:58:04,970 INFO L388 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 13 treesize of output 15 [2021-12-14 16:58:05,015 INFO L388 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 13 treesize of output 15 [2021-12-14 16:58:05,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-14 16:58:05,450 INFO L388 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 51 treesize of output 45 [2021-12-14 16:58:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:05,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:58:05,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:05,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208764025] [2021-12-14 16:58:05,592 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:58:05,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123863676] [2021-12-14 16:58:05,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123863676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:05,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:58:05,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-14 16:58:05,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679548418] [2021-12-14 16:58:05,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:05,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 16:58:05,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 16:58:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:58:05,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2021-12-14 16:58:05,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 483 transitions, 5032 flow. Second operand has 16 states, 16 states have (on average 85.875) internal successors, (1374), 16 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:05,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:05,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2021-12-14 16:58:05,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:10,816 INFO L129 PetriNetUnfolder]: 7988/21293 cut-off events. [2021-12-14 16:58:10,816 INFO L130 PetriNetUnfolder]: For 454827/455241 co-relation queries the response was YES. [2021-12-14 16:58:11,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123240 conditions, 21293 events. 7988/21293 cut-off events. For 454827/455241 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 213487 event pairs, 3169 based on Foata normal form. 37/20191 useless extension candidates. Maximal degree in co-relation 120548. Up to 8880 conditions per place. [2021-12-14 16:58:11,213 INFO L132 encePairwiseOnDemand]: 131/150 looper letters, 445 selfloop transitions, 111 changer transitions 4/639 dead transitions. [2021-12-14 16:58:11,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 639 transitions, 8439 flow [2021-12-14 16:58:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 16:58:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-14 16:58:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1965 transitions. [2021-12-14 16:58:11,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2021-12-14 16:58:11,216 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1965 transitions. [2021-12-14 16:58:11,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1965 transitions. [2021-12-14 16:58:11,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:11,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1965 transitions. [2021-12-14 16:58:11,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 93.57142857142857) internal successors, (1965), 21 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:11,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 150.0) internal successors, (3300), 22 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:11,223 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 150.0) internal successors, (3300), 22 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:11,223 INFO L186 Difference]: Start difference. First operand has 348 places, 483 transitions, 5032 flow. Second operand 21 states and 1965 transitions. [2021-12-14 16:58:11,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 639 transitions, 8439 flow [2021-12-14 16:58:12,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 639 transitions, 8240 flow, removed 49 selfloop flow, removed 9 redundant places. [2021-12-14 16:58:12,227 INFO L242 Difference]: Finished difference. Result has 365 places, 502 transitions, 5567 flow [2021-12-14 16:58:12,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5567, PETRI_PLACES=365, PETRI_TRANSITIONS=502} [2021-12-14 16:58:12,228 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 230 predicate places. [2021-12-14 16:58:12,228 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 502 transitions, 5567 flow [2021-12-14 16:58:12,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.875) internal successors, (1374), 16 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:12,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:12,229 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:12,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-14 16:58:12,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 16:58:12,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-14 16:58:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1059883649, now seen corresponding path program 1 times [2021-12-14 16:58:12,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:12,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415835300] [2021-12-14 16:58:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:12,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:12,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 16:58:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720933018] [2021-12-14 16:58:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:12,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:12,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:12,447 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) [2021-12-14 16:58:12,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 16:58:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:58:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:12,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:58:12,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:12,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415835300] [2021-12-14 16:58:12,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 16:58:12,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720933018] [2021-12-14 16:58:12,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720933018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:12,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:58:12,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:58:12,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264009638] [2021-12-14 16:58:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:12,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:58:12,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:58:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:58:12,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 150 [2021-12-14 16:58:12,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 502 transitions, 5567 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:58:12,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:12,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 150 [2021-12-14 16:58:12,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:14,736 INFO L129 PetriNetUnfolder]: 2249/9425 cut-off events. [2021-12-14 16:58:14,737 INFO L130 PetriNetUnfolder]: For 172204/173626 co-relation queries the response was YES.