./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --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/weaver/bench-exp2x6.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:45:50,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:45:50,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:45:50,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:45:50,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:45:50,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:45:50,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:45:50,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:45:50,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:45:50,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:45:50,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:45:50,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:45:50,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:45:50,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:45:50,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:45:50,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:45:50,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:45:50,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:45:50,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:45:50,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:45:50,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:45:50,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:45:50,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:45:50,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:45:50,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:45:50,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:45:50,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:45:50,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:45:50,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:45:50,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:45:50,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:45:50,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:45:50,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:45:50,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:45:50,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:45:50,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:45:50,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:45:50,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:45:50,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:45:50,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:45:50,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:45:50,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:45:50,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:45:50,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:45:50,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:45:50,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:45:50,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:45:50,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:45:50,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:45:50,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:45:50,734 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:45:50,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:45:50,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:45:50,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:45:50,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:45:50,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:45:50,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:45:50,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:45:50,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:45:50,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:45:50,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:45:50,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:45:50,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:45:50,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:45:50,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:45:50,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:45:50,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:45:50,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:45:50,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:45:50,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:45:50,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:45:50,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:45:50,738 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:45:50,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:45:50,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:45:50,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:45:50,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2021-12-14 16:45:50,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:45:51,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:45:51,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:45:51,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:45:51,011 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:45:51,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2021-12-14 16:45:51,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35197bde8/2193a29974f247b5816935a31c93e05e/FLAG4155cdcd2 [2021-12-14 16:45:51,463 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:45:51,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2021-12-14 16:45:51,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35197bde8/2193a29974f247b5816935a31c93e05e/FLAG4155cdcd2 [2021-12-14 16:45:51,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35197bde8/2193a29974f247b5816935a31c93e05e [2021-12-14 16:45:51,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:45:51,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:45:51,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:45:51,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:45:51,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:45:51,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:45:51" (1/1) ... [2021-12-14 16:45:51,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3ef5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:51, skipping insertion in model container [2021-12-14 16:45:51,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:45:51" (1/1) ... [2021-12-14 16:45:51,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:45:51,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:45:52,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2021-12-14 16:45:52,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:45:52,180 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:45:52,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2021-12-14 16:45:52,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:45:52,224 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:45:52,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52 WrapperNode [2021-12-14 16:45:52,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:45:52,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:45:52,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:45:52,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:45:52,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,277 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-14 16:45:52,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:45:52,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:45:52,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:45:52,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:45:52,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:45:52,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:45:52,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:45:52,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:45:52,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (1/1) ... [2021-12-14 16:45:52,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:45:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:45:52,377 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 16:45:52,400 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 16:45:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:45:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:45:52,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:45:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:45:52,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:45:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-14 16:45:52,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-14 16:45:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-14 16:45:52,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-14 16:45:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:45:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:45:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:45:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:45:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:45:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:45:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:45:52,426 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 16:45:52,490 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:45:52,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:45:52,735 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:45:52,743 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:45:52,743 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 16:45:52,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:45:52 BoogieIcfgContainer [2021-12-14 16:45:52,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:45:52,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:45:52,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:45:52,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:45:52,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:45:51" (1/3) ... [2021-12-14 16:45:52,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6623d11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:45:52, skipping insertion in model container [2021-12-14 16:45:52,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:52" (2/3) ... [2021-12-14 16:45:52,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6623d11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:45:52, skipping insertion in model container [2021-12-14 16:45:52,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:45:52" (3/3) ... [2021-12-14 16:45:52,756 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2021-12-14 16:45:52,763 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:45:52,764 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:45:52,764 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:45:52,764 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:45:52,804 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,805 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,806 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,808 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,808 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,808 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,810 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,810 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,810 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,810 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,818 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,818 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,819 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,819 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,820 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,820 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:45:52,824 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-14 16:45:52,872 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:45:52,878 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 16:45:52,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-14 16:45:52,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2021-12-14 16:45:52,954 INFO L129 PetriNetUnfolder]: 10/133 cut-off events. [2021-12-14 16:45:52,954 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:45:52,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2021-12-14 16:45:52,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2021-12-14 16:45:52,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2021-12-14 16:45:52,996 INFO L129 PetriNetUnfolder]: 10/119 cut-off events. [2021-12-14 16:45:52,996 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:45:52,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:52,998 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 16:45:52,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:45:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 681650960, now seen corresponding path program 1 times [2021-12-14 16:45:53,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698567935] [2021-12-14 16:45:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:53,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:53,267 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 16:45:53,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698567935] [2021-12-14 16:45:53,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698567935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:53,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:53,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:45:53,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946705848] [2021-12-14 16:45:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:53,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:45:53,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:53,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:45:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:45:53,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2021-12-14 16:45:53,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 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 16:45:53,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:53,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2021-12-14 16:45:53,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:53,361 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2021-12-14 16:45:53,367 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-14 16:45:53,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2021-12-14 16:45:53,372 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2021-12-14 16:45:53,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2021-12-14 16:45:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:45:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:45:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2021-12-14 16:45:53,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2021-12-14 16:45:53,390 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2021-12-14 16:45:53,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2021-12-14 16:45:53,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:53,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2021-12-14 16:45:53,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 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 16:45:53,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 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 16:45:53,402 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 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 16:45:53,403 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2021-12-14 16:45:53,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2021-12-14 16:45:53,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-14 16:45:53,411 INFO L242 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2021-12-14 16:45:53,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2021-12-14 16:45:53,417 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2021-12-14 16:45:53,417 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2021-12-14 16:45:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 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 16:45:53,418 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:53,418 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 16:45:53,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:45:53,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:45:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash -712841604, now seen corresponding path program 1 times [2021-12-14 16:45:53,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:53,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97152317] [2021-12-14 16:45:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:53,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:53,859 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 16:45:53,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:53,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97152317] [2021-12-14 16:45:53,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97152317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:53,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:53,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:45:53,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397039599] [2021-12-14 16:45:53,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:53,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:45:53,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:45:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:45:53,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2021-12-14 16:45:53,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 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 16:45:53,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:53,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2021-12-14 16:45:53,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:55,208 INFO L129 PetriNetUnfolder]: 5788/8844 cut-off events. [2021-12-14 16:45:55,208 INFO L130 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2021-12-14 16:45:55,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52550 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2021-12-14 16:45:55,309 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2021-12-14 16:45:55,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2021-12-14 16:45:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:45:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:45:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2021-12-14 16:45:55,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2021-12-14 16:45:55,315 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2021-12-14 16:45:55,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2021-12-14 16:45:55,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:55,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2021-12-14 16:45:55,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 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 16:45:55,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:55,326 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:45:55,326 INFO L186 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2021-12-14 16:45:55,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2021-12-14 16:45:55,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:45:55,333 INFO L242 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2021-12-14 16:45:55,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2021-12-14 16:45:55,334 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2021-12-14 16:45:55,335 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2021-12-14 16:45:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 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 16:45:55,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:55,336 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] [2021-12-14 16:45:55,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:45:55,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:45:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2021-12-14 16:45:55,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:55,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41481053] [2021-12-14 16:45:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:55,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:45:55,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:55,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41481053] [2021-12-14 16:45:55,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41481053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:45:55,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961455185] [2021-12-14 16:45:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:55,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:45:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:45:55,578 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 16:45:55,602 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 16:45:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:45:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:45:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:45:56,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:45:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:45:56,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961455185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:45:56,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:45:56,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-14 16:45:56,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790543189] [2021-12-14 16:45:56,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:45:56,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:45:56,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:56,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:45:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:45:56,578 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 137 [2021-12-14 16:45:56,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 94.7) internal successors, (947), 10 states have internal predecessors, (947), 0 states have call successors, (0), 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 16:45:56,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:56,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 137 [2021-12-14 16:45:56,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:57,590 INFO L129 PetriNetUnfolder]: 3382/6436 cut-off events. [2021-12-14 16:45:57,590 INFO L130 PetriNetUnfolder]: For 673/783 co-relation queries the response was YES. [2021-12-14 16:45:57,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12443 conditions, 6436 events. 3382/6436 cut-off events. For 673/783 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49630 event pairs, 717 based on Foata normal form. 41/5036 useless extension candidates. Maximal degree in co-relation 12436. Up to 2263 conditions per place. [2021-12-14 16:45:57,650 INFO L132 encePairwiseOnDemand]: 124/137 looper letters, 103 selfloop transitions, 20 changer transitions 0/199 dead transitions. [2021-12-14 16:45:57,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 737 flow [2021-12-14 16:45:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:45:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:45:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1205 transitions. [2021-12-14 16:45:57,654 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7329683698296837 [2021-12-14 16:45:57,655 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1205 transitions. [2021-12-14 16:45:57,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1205 transitions. [2021-12-14 16:45:57,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:57,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1205 transitions. [2021-12-14 16:45:57,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.41666666666667) internal successors, (1205), 12 states have internal predecessors, (1205), 0 states have call successors, (0), 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 16:45:57,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 0 states have call successors, (0), 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 16:45:57,663 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 0 states have call successors, (0), 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 16:45:57,664 INFO L186 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 12 states and 1205 transitions. [2021-12-14 16:45:57,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 737 flow [2021-12-14 16:45:57,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 199 transitions, 716 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-12-14 16:45:57,670 INFO L242 Difference]: Finished difference. Result has 134 places, 128 transitions, 390 flow [2021-12-14 16:45:57,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=390, PETRI_PLACES=134, PETRI_TRANSITIONS=128} [2021-12-14 16:45:57,671 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 11 predicate places. [2021-12-14 16:45:57,671 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 128 transitions, 390 flow [2021-12-14 16:45:57,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 94.7) internal successors, (947), 10 states have internal predecessors, (947), 0 states have call successors, (0), 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 16:45:57,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:57,672 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] [2021-12-14 16:45:57,703 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 16:45:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:45:57,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:45:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -8459349, now seen corresponding path program 2 times [2021-12-14 16:45:57,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543186064] [2021-12-14 16:45:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:57,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:45:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:45:58,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:45:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543186064] [2021-12-14 16:45:58,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543186064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:45:58,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:45:58,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:45:58,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971778192] [2021-12-14 16:45:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:45:58,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:45:58,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:45:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:45:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:45:58,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-14 16:45:58,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 128 transitions, 390 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 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 16:45:58,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:45:58,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-14 16:45:58,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:45:59,631 INFO L129 PetriNetUnfolder]: 9701/14002 cut-off events. [2021-12-14 16:45:59,632 INFO L130 PetriNetUnfolder]: For 14085/14168 co-relation queries the response was YES. [2021-12-14 16:45:59,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37368 conditions, 14002 events. 9701/14002 cut-off events. For 14085/14168 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 84281 event pairs, 3214 based on Foata normal form. 37/12742 useless extension candidates. Maximal degree in co-relation 37357. Up to 12875 conditions per place. [2021-12-14 16:45:59,789 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 11 changer transitions 1/156 dead transitions. [2021-12-14 16:45:59,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 156 transitions, 686 flow [2021-12-14 16:45:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:45:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:45:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2021-12-14 16:45:59,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2021-12-14 16:45:59,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2021-12-14 16:45:59,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2021-12-14 16:45:59,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:45:59,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2021-12-14 16:45:59,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 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 16:45:59,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:45:59,796 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:45:59,797 INFO L186 Difference]: Start difference. First operand has 134 places, 128 transitions, 390 flow. Second operand 6 states and 550 transitions. [2021-12-14 16:45:59,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 156 transitions, 686 flow [2021-12-14 16:45:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 156 transitions, 680 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-14 16:45:59,829 INFO L242 Difference]: Finished difference. Result has 138 places, 132 transitions, 449 flow [2021-12-14 16:45:59,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2021-12-14 16:45:59,831 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2021-12-14 16:45:59,832 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 449 flow [2021-12-14 16:45:59,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 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 16:45:59,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:45:59,832 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] [2021-12-14 16:45:59,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:45:59,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:45:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:45:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -64222800, now seen corresponding path program 1 times [2021-12-14 16:45:59,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:45:59,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382840251] [2021-12-14 16:45:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:45:59,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:45:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:00,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:00,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382840251] [2021-12-14 16:46:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382840251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:00,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:00,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:00,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683774109] [2021-12-14 16:46:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:00,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 137 [2021-12-14 16:46:00,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 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 16:46:00,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:00,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 137 [2021-12-14 16:46:00,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:00,599 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([309] L38-1-->L38-2: Formula: (not (< (mod v_~x1~0_1 4294967296) (mod v_~n~0_1 4294967296))) InVars {~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} OutVars{~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} AuxVars[] AssignedVars[][95], [Black: 150#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 789#(and (<= (+ (* 4294967296 (div ~x4~0 4294967296)) ~n~0) (+ ~x4~0 (* 4294967296 (div ~n~0 4294967296)))) (<= (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0) (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0))), 56#L97-4true, Black: 773#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 774#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (<= (+ ~n~0 (* 4294967296 (div ~x1~0 4294967296))) (+ ~x1~0 (* 4294967296 (div ~n~0 4294967296)))) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 71#L38-2true, 54#L71-2true, 769#true, 51#L51true, 143#true, Black: 298#(and (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296))), Black: 756#(and (<= (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))) (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0)) (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296))), Black: 752#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 168#(<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)), Black: 760#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), 163#true, 121#L61true, Black: 754#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x1~0 4294967296)))]) [2021-12-14 16:46:00,600 INFO L384 tUnfolder$Statistics]: this new event has 74 ancestors and is cut-off event [2021-12-14 16:46:00,600 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2021-12-14 16:46:00,600 INFO L387 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2021-12-14 16:46:00,600 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2021-12-14 16:46:00,648 INFO L382 tUnfolder$Statistics]: inserting event number 5 for the transition-marking pair ([309] L38-1-->L38-2: Formula: (not (< (mod v_~x1~0_1 4294967296) (mod v_~n~0_1 4294967296))) InVars {~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} OutVars{~n~0=v_~n~0_1, ~x1~0=v_~x1~0_1} AuxVars[] AssignedVars[][95], [Black: 150#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 789#(and (<= (+ (* 4294967296 (div ~x4~0 4294967296)) ~n~0) (+ ~x4~0 (* 4294967296 (div ~n~0 4294967296)))) (<= (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0) (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0))), Black: 773#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 56#L97-4true, Black: 774#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (<= (+ ~n~0 (* 4294967296 (div ~x1~0 4294967296))) (+ ~x1~0 (* 4294967296 (div ~n~0 4294967296)))) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 71#L38-2true, 54#L71-2true, 769#true, 51#L51true, 143#true, Black: 298#(and (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296))), Black: 756#(and (<= (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))) (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0)) (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x2~0 4294967296))), Black: 752#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 168#(<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)), 163#true, 121#L61true, Black: 760#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< 0 (mod ~x1~0 4294967296))), Black: 754#(and (= (mod ~x2~0 4294967296) (mod ~x1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (mod ~x2~0 4294967296) (mod ~n~0 4294967296)) (< 0 (mod ~x1~0 4294967296)))]) [2021-12-14 16:46:00,649 INFO L384 tUnfolder$Statistics]: this new event has 74 ancestors and is cut-off event [2021-12-14 16:46:00,649 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2021-12-14 16:46:00,649 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2021-12-14 16:46:00,649 INFO L387 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2021-12-14 16:46:00,649 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2021-12-14 16:46:01,081 INFO L129 PetriNetUnfolder]: 5452/9041 cut-off events. [2021-12-14 16:46:01,081 INFO L130 PetriNetUnfolder]: For 15051/15360 co-relation queries the response was YES. [2021-12-14 16:46:01,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24987 conditions, 9041 events. 5452/9041 cut-off events. For 15051/15360 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 66838 event pairs, 947 based on Foata normal form. 84/7911 useless extension candidates. Maximal degree in co-relation 24973. Up to 5327 conditions per place. [2021-12-14 16:46:01,183 INFO L132 encePairwiseOnDemand]: 124/137 looper letters, 93 selfloop transitions, 23 changer transitions 0/197 dead transitions. [2021-12-14 16:46:01,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 197 transitions, 1013 flow [2021-12-14 16:46:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 713 transitions. [2021-12-14 16:46:01,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7434827945776851 [2021-12-14 16:46:01,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 713 transitions. [2021-12-14 16:46:01,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 713 transitions. [2021-12-14 16:46:01,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:01,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 713 transitions. [2021-12-14 16:46:01,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.85714285714286) internal successors, (713), 7 states have internal predecessors, (713), 0 states have call successors, (0), 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 16:46:01,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:01,193 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:01,193 INFO L186 Difference]: Start difference. First operand has 138 places, 132 transitions, 449 flow. Second operand 7 states and 713 transitions. [2021-12-14 16:46:01,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 197 transitions, 1013 flow [2021-12-14 16:46:01,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 971 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-12-14 16:46:01,209 INFO L242 Difference]: Finished difference. Result has 143 places, 144 transitions, 554 flow [2021-12-14 16:46:01,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=143, PETRI_TRANSITIONS=144} [2021-12-14 16:46:01,212 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 20 predicate places. [2021-12-14 16:46:01,213 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 144 transitions, 554 flow [2021-12-14 16:46:01,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 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 16:46:01,213 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:01,214 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] [2021-12-14 16:46:01,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:46:01,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1676823890, now seen corresponding path program 2 times [2021-12-14 16:46:01,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:01,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690871618] [2021-12-14 16:46:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:01,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:01,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:01,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690871618] [2021-12-14 16:46:01,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690871618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:01,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:01,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:01,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57843645] [2021-12-14 16:46:01,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:01,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:01,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:01,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-14 16:46:01,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 144 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 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 16:46:01,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:01,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-14 16:46:01,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:03,324 INFO L129 PetriNetUnfolder]: 11640/18274 cut-off events. [2021-12-14 16:46:03,325 INFO L130 PetriNetUnfolder]: For 29010/29083 co-relation queries the response was YES. [2021-12-14 16:46:03,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53571 conditions, 18274 events. 11640/18274 cut-off events. For 29010/29083 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 129276 event pairs, 6715 based on Foata normal form. 20/17954 useless extension candidates. Maximal degree in co-relation 53554. Up to 15554 conditions per place. [2021-12-14 16:46:03,547 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 97 selfloop transitions, 15 changer transitions 2/176 dead transitions. [2021-12-14 16:46:03,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 176 transitions, 958 flow [2021-12-14 16:46:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:46:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:46:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2021-12-14 16:46:03,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2021-12-14 16:46:03,550 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2021-12-14 16:46:03,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2021-12-14 16:46:03,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:03,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2021-12-14 16:46:03,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 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 16:46:03,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:46:03,554 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:46:03,554 INFO L186 Difference]: Start difference. First operand has 143 places, 144 transitions, 554 flow. Second operand 6 states and 550 transitions. [2021-12-14 16:46:03,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 176 transitions, 958 flow [2021-12-14 16:46:03,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 176 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-14 16:46:03,583 INFO L242 Difference]: Finished difference. Result has 148 places, 146 transitions, 613 flow [2021-12-14 16:46:03,583 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=148, PETRI_TRANSITIONS=146} [2021-12-14 16:46:03,586 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 25 predicate places. [2021-12-14 16:46:03,586 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 146 transitions, 613 flow [2021-12-14 16:46:03,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 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 16:46:03,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:03,587 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] [2021-12-14 16:46:03,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:46:03,588 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1982756243, now seen corresponding path program 1 times [2021-12-14 16:46:03,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767006472] [2021-12-14 16:46:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:03,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:03,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:03,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767006472] [2021-12-14 16:46:03,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767006472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:46:03,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720601854] [2021-12-14 16:46:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:03,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:46:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:46:03,963 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 16:46:03,966 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 16:46:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:46:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:46:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:04,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:46:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:05,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720601854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:46:05,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:46:05,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-14 16:46:05,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111706120] [2021-12-14 16:46:05,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:46:05,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:46:05,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:46:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:46:05,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-14 16:46:05,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 146 transitions, 613 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 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 16:46:05,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:05,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-14 16:46:05,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:08,396 INFO L129 PetriNetUnfolder]: 15283/24518 cut-off events. [2021-12-14 16:46:08,396 INFO L130 PetriNetUnfolder]: For 43333/43400 co-relation queries the response was YES. [2021-12-14 16:46:08,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74213 conditions, 24518 events. 15283/24518 cut-off events. For 43333/43400 co-relation queries the response was YES. Maximal size of possible extension queue 1221. Compared 183723 event pairs, 2103 based on Foata normal form. 604/24825 useless extension candidates. Maximal degree in co-relation 74193. Up to 10193 conditions per place. [2021-12-14 16:46:08,665 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 260 selfloop transitions, 31 changer transitions 2/355 dead transitions. [2021-12-14 16:46:08,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 355 transitions, 2301 flow [2021-12-14 16:46:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:46:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:46:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1302 transitions. [2021-12-14 16:46:08,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6788321167883211 [2021-12-14 16:46:08,669 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1302 transitions. [2021-12-14 16:46:08,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1302 transitions. [2021-12-14 16:46:08,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:08,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1302 transitions. [2021-12-14 16:46:08,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.0) internal successors, (1302), 14 states have internal predecessors, (1302), 0 states have call successors, (0), 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 16:46:08,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 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 16:46:08,678 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 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 16:46:08,678 INFO L186 Difference]: Start difference. First operand has 148 places, 146 transitions, 613 flow. Second operand 14 states and 1302 transitions. [2021-12-14 16:46:08,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 355 transitions, 2301 flow [2021-12-14 16:46:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 355 transitions, 2284 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-12-14 16:46:08,742 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 774 flow [2021-12-14 16:46:08,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=774, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2021-12-14 16:46:08,743 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 42 predicate places. [2021-12-14 16:46:08,743 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 774 flow [2021-12-14 16:46:08,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 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 16:46:08,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:08,744 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] [2021-12-14 16:46:08,770 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 16:46:08,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-14 16:46:08,969 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1634552423, now seen corresponding path program 2 times [2021-12-14 16:46:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:08,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488223880] [2021-12-14 16:46:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:08,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:09,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:09,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488223880] [2021-12-14 16:46:09,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488223880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:09,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:09,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:09,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750226197] [2021-12-14 16:46:09,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:09,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:09,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:09,162 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-14 16:46:09,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 774 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 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 16:46:09,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:09,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-14 16:46:09,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:11,605 INFO L129 PetriNetUnfolder]: 15071/23363 cut-off events. [2021-12-14 16:46:11,606 INFO L130 PetriNetUnfolder]: For 58104/58171 co-relation queries the response was YES. [2021-12-14 16:46:11,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80951 conditions, 23363 events. 15071/23363 cut-off events. For 58104/58171 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 165681 event pairs, 8742 based on Foata normal form. 10/23036 useless extension candidates. Maximal degree in co-relation 80925. Up to 20405 conditions per place. [2021-12-14 16:46:11,885 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 101 selfloop transitions, 15 changer transitions 8/186 dead transitions. [2021-12-14 16:46:11,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 186 transitions, 1210 flow [2021-12-14 16:46:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:46:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:46:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 549 transitions. [2021-12-14 16:46:11,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6678832116788321 [2021-12-14 16:46:11,888 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 549 transitions. [2021-12-14 16:46:11,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 549 transitions. [2021-12-14 16:46:11,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:11,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 549 transitions. [2021-12-14 16:46:11,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.5) internal successors, (549), 6 states have internal predecessors, (549), 0 states have call successors, (0), 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 16:46:11,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:46:11,892 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:46:11,892 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 774 flow. Second operand 6 states and 549 transitions. [2021-12-14 16:46:11,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 186 transitions, 1210 flow [2021-12-14 16:46:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 186 transitions, 1177 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-12-14 16:46:12,051 INFO L242 Difference]: Finished difference. Result has 167 places, 158 transitions, 812 flow [2021-12-14 16:46:12,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=812, PETRI_PLACES=167, PETRI_TRANSITIONS=158} [2021-12-14 16:46:12,052 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 44 predicate places. [2021-12-14 16:46:12,052 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 158 transitions, 812 flow [2021-12-14 16:46:12,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 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 16:46:12,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:12,053 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] [2021-12-14 16:46:12,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:46:12,053 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash -491112886, now seen corresponding path program 3 times [2021-12-14 16:46:12,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:12,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692595733] [2021-12-14 16:46:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:12,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:12,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692595733] [2021-12-14 16:46:12,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692595733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:12,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:12,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:46:12,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309908437] [2021-12-14 16:46:12,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:12,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:46:12,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:46:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:46:12,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2021-12-14 16:46:12,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 158 transitions, 812 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 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 16:46:12,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:12,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2021-12-14 16:46:12,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:14,734 INFO L129 PetriNetUnfolder]: 16608/25526 cut-off events. [2021-12-14 16:46:14,734 INFO L130 PetriNetUnfolder]: For 67471/67548 co-relation queries the response was YES. [2021-12-14 16:46:15,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88707 conditions, 25526 events. 16608/25526 cut-off events. For 67471/67548 co-relation queries the response was YES. Maximal size of possible extension queue 1249. Compared 181029 event pairs, 7831 based on Foata normal form. 480/25695 useless extension candidates. Maximal degree in co-relation 88678. Up to 16506 conditions per place. [2021-12-14 16:46:15,231 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 136 selfloop transitions, 22 changer transitions 2/222 dead transitions. [2021-12-14 16:46:15,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 222 transitions, 1515 flow [2021-12-14 16:46:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2021-12-14 16:46:15,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2021-12-14 16:46:15,234 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2021-12-14 16:46:15,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2021-12-14 16:46:15,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:15,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2021-12-14 16:46:15,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 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 16:46:15,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:15,238 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:15,238 INFO L186 Difference]: Start difference. First operand has 167 places, 158 transitions, 812 flow. Second operand 7 states and 649 transitions. [2021-12-14 16:46:15,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 222 transitions, 1515 flow [2021-12-14 16:46:15,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 222 transitions, 1492 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-12-14 16:46:15,552 INFO L242 Difference]: Finished difference. Result has 172 places, 160 transitions, 880 flow [2021-12-14 16:46:15,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=172, PETRI_TRANSITIONS=160} [2021-12-14 16:46:15,554 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 49 predicate places. [2021-12-14 16:46:15,554 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 160 transitions, 880 flow [2021-12-14 16:46:15,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 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 16:46:15,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:15,555 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] [2021-12-14 16:46:15,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:46:15,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1360796694, now seen corresponding path program 1 times [2021-12-14 16:46:15,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:15,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879776408] [2021-12-14 16:46:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:15,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:15,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879776408] [2021-12-14 16:46:15,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879776408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:46:15,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:46:15,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:46:15,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018649118] [2021-12-14 16:46:15,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:46:15,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:46:15,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:46:15,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:46:15,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:46:15,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 137 [2021-12-14 16:46:15,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 160 transitions, 880 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 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 16:46:15,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:46:15,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 137 [2021-12-14 16:46:15,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:46:17,780 INFO L129 PetriNetUnfolder]: 8519/16114 cut-off events. [2021-12-14 16:46:17,780 INFO L130 PetriNetUnfolder]: For 60221/61289 co-relation queries the response was YES. [2021-12-14 16:46:17,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59095 conditions, 16114 events. 8519/16114 cut-off events. For 60221/61289 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 141605 event pairs, 3012 based on Foata normal form. 369/15757 useless extension candidates. Maximal degree in co-relation 59065. Up to 6836 conditions per place. [2021-12-14 16:46:17,966 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 139 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2021-12-14 16:46:17,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 243 transitions, 1778 flow [2021-12-14 16:46:17,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:46:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:46:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 723 transitions. [2021-12-14 16:46:17,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7539103232533889 [2021-12-14 16:46:17,968 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 723 transitions. [2021-12-14 16:46:17,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 723 transitions. [2021-12-14 16:46:17,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:46:17,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 723 transitions. [2021-12-14 16:46:17,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 0 states have call successors, (0), 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 16:46:17,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:17,973 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:46:17,973 INFO L186 Difference]: Start difference. First operand has 172 places, 160 transitions, 880 flow. Second operand 7 states and 723 transitions. [2021-12-14 16:46:17,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 243 transitions, 1778 flow [2021-12-14 16:46:18,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 243 transitions, 1755 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:46:18,214 INFO L242 Difference]: Finished difference. Result has 177 places, 163 transitions, 958 flow [2021-12-14 16:46:18,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=958, PETRI_PLACES=177, PETRI_TRANSITIONS=163} [2021-12-14 16:46:18,215 INFO L334 CegarLoopForPetriNet]: 123 programPoint places, 54 predicate places. [2021-12-14 16:46:18,215 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 163 transitions, 958 flow [2021-12-14 16:46:18,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 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 16:46:18,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:46:18,216 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 16:46:18,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:46:18,216 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-14 16:46:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:46:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1696922963, now seen corresponding path program 1 times [2021-12-14 16:46:18,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:46:18,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876422689] [2021-12-14 16:46:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:18,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:46:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:46:33,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:46:33,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876422689] [2021-12-14 16:46:33,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876422689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:46:33,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986740988] [2021-12-14 16:46:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:46:33,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:46:33,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:46:33,412 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 16:46:33,413 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 16:46:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:46:34,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-14 16:46:34,375 INFO L286 TraceCheckSpWp]: Computing forward predicates...