./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/parallel-misc-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:49:52,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:49:52,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:49:52,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:49:52,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:49:52,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:49:52,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:49:52,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:49:52,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:49:52,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:49:52,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:49:52,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:49:52,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:49:52,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:49:52,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:49:52,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:49:52,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:49:52,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:49:52,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:49:52,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:49:52,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:49:52,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:49:52,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:49:52,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:49:52,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:49:52,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:49:52,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:49:52,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:49:52,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:49:52,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:49:52,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:49:52,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:49:52,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:49:52,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:49:52,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:49:52,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:49:52,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:49:52,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:49:52,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:49:52,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:49:52,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:49:52,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:49:52,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:49:52,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:49:52,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:49:52,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:49:52,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:49:52,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:49:52,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:49:52,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:49:52,716 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:49:52,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:49:52,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:49:52,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:49:52,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:49:52,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:49:52,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:49:52,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:49:52,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:49:52,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:49:52,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:49:52,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:49:52,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:49:52,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:49:52,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:49:52,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:49:52,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:49:52,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:49:52,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:49:52,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:49:52,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2021-12-17 22:49:52,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:49:52,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:49:52,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:49:52,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:49:52,922 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:49:52,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-17 22:49:52,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b501345a/821984f495874806bb9bb7373c1dae38/FLAGd3e22d18b [2021-12-17 22:49:53,281 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:49:53,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-17 22:49:53,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b501345a/821984f495874806bb9bb7373c1dae38/FLAGd3e22d18b [2021-12-17 22:49:53,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b501345a/821984f495874806bb9bb7373c1dae38 [2021-12-17 22:49:53,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:49:53,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:49:53,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:49:53,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:49:53,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:49:53,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d518587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53, skipping insertion in model container [2021-12-17 22:49:53,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:49:53,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:49:53,888 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/parallel-misc-2.wvr.c[2554,2567] [2021-12-17 22:49:53,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:49:53,896 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:49:53,920 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/parallel-misc-2.wvr.c[2554,2567] [2021-12-17 22:49:53,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:49:53,929 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:49:53,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53 WrapperNode [2021-12-17 22:49:53,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:49:53,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:49:53,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:49:53,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:49:53,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,965 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2021-12-17 22:49:53,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:49:53,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:49:53,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:49:53,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:49:53,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:49:53,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:49:53,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:49:53,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:49:53,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (1/1) ... [2021-12-17 22:49:53,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:49:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:49:54,015 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) [2021-12-17 22:49:54,034 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 [2021-12-17 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:49:54,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:49:54,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:49:54,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:49:54,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:49:54,046 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:49:54,097 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:49:54,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:49:54,254 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:49:54,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:49:54,281 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 22:49:54,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:49:54 BoogieIcfgContainer [2021-12-17 22:49:54,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:49:54,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:49:54,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:49:54,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:49:54,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:49:53" (1/3) ... [2021-12-17 22:49:54,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562aa070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:49:54, skipping insertion in model container [2021-12-17 22:49:54,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:49:53" (2/3) ... [2021-12-17 22:49:54,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562aa070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:49:54, skipping insertion in model container [2021-12-17 22:49:54,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:49:54" (3/3) ... [2021-12-17 22:49:54,301 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2021-12-17 22:49:54,304 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:49:54,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:49:54,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:49:54,305 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:49:54,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,329 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:49:54,330 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 22:49:54,357 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:49:54,362 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 [2021-12-17 22:49:54,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 22:49:54,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2021-12-17 22:49:54,423 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2021-12-17 22:49:54,424 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:49:54,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-12-17 22:49:54,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2021-12-17 22:49:54,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2021-12-17 22:49:54,463 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2021-12-17 22:49:54,463 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:49:54,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:49:54,464 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] [2021-12-17 22:49:54,465 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:49:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:49:54,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1147510984, now seen corresponding path program 1 times [2021-12-17 22:49:54,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:49:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48956977] [2021-12-17 22:49:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:54,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:49:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:54,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:49:54,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48956977] [2021-12-17 22:49:54,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48956977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:49:54,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:49:54,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:49:54,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955615293] [2021-12-17 22:49:54,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:49:54,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:49:54,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:49:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:49:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:49:54,973 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-17 22:49:54,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:54,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:49:54,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-17 22:49:54,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:49:55,249 INFO L129 PetriNetUnfolder]: 83/278 cut-off events. [2021-12-17 22:49:55,250 INFO L130 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2021-12-17 22:49:55,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 278 events. 83/278 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1032 event pairs, 23 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 320. Up to 121 conditions per place. [2021-12-17 22:49:55,253 INFO L132 encePairwiseOnDemand]: 86/104 looper letters, 31 selfloop transitions, 9 changer transitions 7/104 dead transitions. [2021-12-17 22:49:55,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 323 flow [2021-12-17 22:49:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:49:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:49:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2021-12-17 22:49:55,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971153846153846 [2021-12-17 22:49:55,266 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2021-12-17 22:49:55,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2021-12-17 22:49:55,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:49:55,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2021-12-17 22:49:55,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.5) internal successors, (725), 10 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,281 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,283 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 10 states and 725 transitions. [2021-12-17 22:49:55,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 323 flow [2021-12-17 22:49:55,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:49:55,288 INFO L242 Difference]: Finished difference. Result has 100 places, 91 transitions, 223 flow [2021-12-17 22:49:55,289 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2021-12-17 22:49:55,292 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2021-12-17 22:49:55,292 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 223 flow [2021-12-17 22:49:55,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,293 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:49:55,293 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] [2021-12-17 22:49:55,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:49:55,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:49:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:49:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472794, now seen corresponding path program 1 times [2021-12-17 22:49:55,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:49:55,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338040058] [2021-12-17 22:49:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:55,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:49:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:55,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:49:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338040058] [2021-12-17 22:49:55,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338040058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:49:55,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:49:55,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:49:55,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958774532] [2021-12-17 22:49:55,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:49:55,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:49:55,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:49:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:49:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:49:55,435 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-12-17 22:49:55,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:49:55,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-12-17 22:49:55,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:49:55,631 INFO L129 PetriNetUnfolder]: 82/277 cut-off events. [2021-12-17 22:49:55,631 INFO L130 PetriNetUnfolder]: For 54/63 co-relation queries the response was YES. [2021-12-17 22:49:55,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 277 events. 82/277 cut-off events. For 54/63 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1062 event pairs, 11 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 503. Up to 101 conditions per place. [2021-12-17 22:49:55,633 INFO L132 encePairwiseOnDemand]: 90/104 looper letters, 38 selfloop transitions, 17 changer transitions 4/114 dead transitions. [2021-12-17 22:49:55,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 114 transitions, 408 flow [2021-12-17 22:49:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:49:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:49:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2021-12-17 22:49:55,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7087912087912088 [2021-12-17 22:49:55,635 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2021-12-17 22:49:55,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2021-12-17 22:49:55,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:49:55,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2021-12-17 22:49:55,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,639 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,639 INFO L186 Difference]: Start difference. First operand has 100 places, 91 transitions, 223 flow. Second operand 7 states and 516 transitions. [2021-12-17 22:49:55,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 114 transitions, 408 flow [2021-12-17 22:49:55,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 114 transitions, 387 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-17 22:49:55,642 INFO L242 Difference]: Finished difference. Result has 97 places, 98 transitions, 291 flow [2021-12-17 22:49:55,642 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2021-12-17 22:49:55,642 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2021-12-17 22:49:55,643 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 291 flow [2021-12-17 22:49:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:49:55,643 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] [2021-12-17 22:49:55,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:49:55,644 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:49:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:49:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1988260238, now seen corresponding path program 2 times [2021-12-17 22:49:55,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:49:55,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557802631] [2021-12-17 22:49:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:55,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:49:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:55,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:49:55,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557802631] [2021-12-17 22:49:55,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557802631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:49:55,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:49:55,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:49:55,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556036016] [2021-12-17 22:49:55,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:49:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:49:55,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:49:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:49:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:49:55,791 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-12-17 22:49:55,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:49:55,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-12-17 22:49:55,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:49:55,893 INFO L129 PetriNetUnfolder]: 73/264 cut-off events. [2021-12-17 22:49:55,893 INFO L130 PetriNetUnfolder]: For 117/122 co-relation queries the response was YES. [2021-12-17 22:49:55,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 264 events. 73/264 cut-off events. For 117/122 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 965 event pairs, 25 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 378. Up to 121 conditions per place. [2021-12-17 22:49:55,895 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 33 selfloop transitions, 9 changer transitions 5/102 dead transitions. [2021-12-17 22:49:55,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 380 flow [2021-12-17 22:49:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 22:49:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 22:49:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 438 transitions. [2021-12-17 22:49:55,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7019230769230769 [2021-12-17 22:49:55,898 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 438 transitions. [2021-12-17 22:49:55,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 438 transitions. [2021-12-17 22:49:55,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:49:55,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 438 transitions. [2021-12-17 22:49:55,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,900 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,900 INFO L186 Difference]: Start difference. First operand has 97 places, 98 transitions, 291 flow. Second operand 6 states and 438 transitions. [2021-12-17 22:49:55,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 380 flow [2021-12-17 22:49:55,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 363 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-17 22:49:55,903 INFO L242 Difference]: Finished difference. Result has 98 places, 93 transitions, 258 flow [2021-12-17 22:49:55,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2021-12-17 22:49:55,904 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 6 predicate places. [2021-12-17 22:49:55,904 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 258 flow [2021-12-17 22:49:55,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:55,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:49:55,904 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] [2021-12-17 22:49:55,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:49:55,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:49:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:49:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1392836387, now seen corresponding path program 1 times [2021-12-17 22:49:55,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:49:55,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893391072] [2021-12-17 22:49:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:55,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:49:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:56,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:49:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893391072] [2021-12-17 22:49:56,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893391072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:49:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768084449] [2021-12-17 22:49:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:56,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:49:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:49:56,063 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) [2021-12-17 22:49:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 22:49:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 22:49:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:49:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:56,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:49:58,574 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (* ~N~0 2))) (or (<= (mod .cse0 4294967296) (mod c_~i1~0 4294967296)) (<= (+ c_~i2~0 (* 4294967296 (div .cse0 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div c_~i2~0 4294967296))))))) is different from false [2021-12-17 22:49:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-17 22:49:58,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768084449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:49:58,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:49:58,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-17 22:49:58,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522449423] [2021-12-17 22:49:58,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:49:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:49:58,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:49:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:49:58,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=112, Unknown=1, NotChecked=22, Total=182 [2021-12-17 22:49:58,896 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-12-17 22:49:58,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 258 flow. Second operand has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:58,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:49:58,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-12-17 22:49:58,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:49:59,248 INFO L129 PetriNetUnfolder]: 122/363 cut-off events. [2021-12-17 22:49:59,249 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2021-12-17 22:49:59,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 363 events. 122/363 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1502 event pairs, 25 based on Foata normal form. 10/350 useless extension candidates. Maximal degree in co-relation 352. Up to 73 conditions per place. [2021-12-17 22:49:59,253 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 57 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2021-12-17 22:49:59,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 127 transitions, 527 flow [2021-12-17 22:49:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:49:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:49:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 660 transitions. [2021-12-17 22:49:59,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7051282051282052 [2021-12-17 22:49:59,256 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 660 transitions. [2021-12-17 22:49:59,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 660 transitions. [2021-12-17 22:49:59,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:49:59,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 660 transitions. [2021-12-17 22:49:59,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.33333333333333) internal successors, (660), 9 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:59,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:59,259 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:59,259 INFO L186 Difference]: Start difference. First operand has 98 places, 93 transitions, 258 flow. Second operand 9 states and 660 transitions. [2021-12-17 22:49:59,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 127 transitions, 527 flow [2021-12-17 22:49:59,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 489 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-12-17 22:49:59,263 INFO L242 Difference]: Finished difference. Result has 103 places, 98 transitions, 305 flow [2021-12-17 22:49:59,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2021-12-17 22:49:59,265 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2021-12-17 22:49:59,265 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 305 flow [2021-12-17 22:49:59,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:49:59,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:49:59,266 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] [2021-12-17 22:49:59,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 22:49:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:49:59,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:49:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:49:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash -725094136, now seen corresponding path program 3 times [2021-12-17 22:49:59,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:49:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475451445] [2021-12-17 22:49:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:49:59,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:49:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:49:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:59,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:49:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475451445] [2021-12-17 22:49:59,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475451445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:49:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77689682] [2021-12-17 22:49:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:49:59,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:49:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:49:59,601 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) [2021-12-17 22:49:59,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 22:49:59,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 22:49:59,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:49:59,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 22:49:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:49:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:49:59,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:00,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77689682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:00,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:00,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-17 22:50:00,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338524674] [2021-12-17 22:50:00,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:00,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:50:00,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:00,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:50:00,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:50:00,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-12-17 22:50:00,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 305 flow. Second operand has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:00,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:00,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-12-17 22:50:00,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:00,576 INFO L129 PetriNetUnfolder]: 152/435 cut-off events. [2021-12-17 22:50:00,577 INFO L130 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2021-12-17 22:50:00,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 435 events. 152/435 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1859 event pairs, 14 based on Foata normal form. 5/418 useless extension candidates. Maximal degree in co-relation 723. Up to 93 conditions per place. [2021-12-17 22:50:00,580 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 61 selfloop transitions, 16 changer transitions 0/132 dead transitions. [2021-12-17 22:50:00,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 132 transitions, 607 flow [2021-12-17 22:50:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:50:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:50:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 657 transitions. [2021-12-17 22:50:00,581 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7019230769230769 [2021-12-17 22:50:00,582 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 657 transitions. [2021-12-17 22:50:00,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 657 transitions. [2021-12-17 22:50:00,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:00,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 657 transitions. [2021-12-17 22:50:00,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:00,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:00,585 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:00,585 INFO L186 Difference]: Start difference. First operand has 103 places, 98 transitions, 305 flow. Second operand 9 states and 657 transitions. [2021-12-17 22:50:00,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 132 transitions, 607 flow [2021-12-17 22:50:00,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 594 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:50:00,590 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 365 flow [2021-12-17 22:50:00,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=365, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2021-12-17 22:50:00,593 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2021-12-17 22:50:00,593 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 365 flow [2021-12-17 22:50:00,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:00,593 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:00,594 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] [2021-12-17 22:50:00,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:50:00,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:00,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash 267835377, now seen corresponding path program 1 times [2021-12-17 22:50:00,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:00,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965293103] [2021-12-17 22:50:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:00,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:01,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965293103] [2021-12-17 22:50:01,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965293103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396127971] [2021-12-17 22:50:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:01,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:01,052 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) [2021-12-17 22:50:01,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 22:50:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 22:50:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:01,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:01,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396127971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:01,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:01,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-12-17 22:50:01,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863442100] [2021-12-17 22:50:01,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:01,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 22:50:01,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 22:50:01,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-17 22:50:01,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2021-12-17 22:50:01,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 365 flow. Second operand has 20 states, 20 states have (on average 66.95) internal successors, (1339), 20 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:01,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:01,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2021-12-17 22:50:01,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:02,619 INFO L129 PetriNetUnfolder]: 234/612 cut-off events. [2021-12-17 22:50:02,620 INFO L130 PetriNetUnfolder]: For 831/831 co-relation queries the response was YES. [2021-12-17 22:50:02,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 612 events. 234/612 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2772 event pairs, 6 based on Foata normal form. 10/591 useless extension candidates. Maximal degree in co-relation 1255. Up to 129 conditions per place. [2021-12-17 22:50:02,624 INFO L132 encePairwiseOnDemand]: 89/104 looper letters, 95 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2021-12-17 22:50:02,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 169 transitions, 933 flow [2021-12-17 22:50:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:50:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:50:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 929 transitions. [2021-12-17 22:50:02,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6871301775147929 [2021-12-17 22:50:02,627 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 929 transitions. [2021-12-17 22:50:02,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 929 transitions. [2021-12-17 22:50:02,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:02,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 929 transitions. [2021-12-17 22:50:02,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.46153846153847) internal successors, (929), 13 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,631 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,631 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 365 flow. Second operand 13 states and 929 transitions. [2021-12-17 22:50:02,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 169 transitions, 933 flow [2021-12-17 22:50:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 169 transitions, 920 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:50:02,636 INFO L242 Difference]: Finished difference. Result has 121 places, 106 transitions, 432 flow [2021-12-17 22:50:02,637 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=432, PETRI_PLACES=121, PETRI_TRANSITIONS=106} [2021-12-17 22:50:02,639 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 29 predicate places. [2021-12-17 22:50:02,639 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 106 transitions, 432 flow [2021-12-17 22:50:02,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.95) internal successors, (1339), 20 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:02,640 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:02,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 22:50:02,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:02,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash 47495648, now seen corresponding path program 2 times [2021-12-17 22:50:02,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:02,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933308956] [2021-12-17 22:50:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:02,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:02,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:02,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933308956] [2021-12-17 22:50:02,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933308956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:50:02,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:50:02,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:50:02,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671144635] [2021-12-17 22:50:02,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:50:02,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:50:02,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:50:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:50:02,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-17 22:50:02,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 106 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:02,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-17 22:50:02,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:02,988 INFO L129 PetriNetUnfolder]: 142/683 cut-off events. [2021-12-17 22:50:02,989 INFO L130 PetriNetUnfolder]: For 872/884 co-relation queries the response was YES. [2021-12-17 22:50:02,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 683 events. 142/683 cut-off events. For 872/884 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4123 event pairs, 52 based on Foata normal form. 4/623 useless extension candidates. Maximal degree in co-relation 1223. Up to 114 conditions per place. [2021-12-17 22:50:02,994 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 20 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2021-12-17 22:50:02,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 117 transitions, 512 flow [2021-12-17 22:50:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:50:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:50:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2021-12-17 22:50:02,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2021-12-17 22:50:02,996 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2021-12-17 22:50:02,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2021-12-17 22:50:02,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:02,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2021-12-17 22:50:02,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:02,998 INFO L186 Difference]: Start difference. First operand has 121 places, 106 transitions, 432 flow. Second operand 4 states and 376 transitions. [2021-12-17 22:50:02,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 117 transitions, 512 flow [2021-12-17 22:50:03,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 117 transitions, 485 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-12-17 22:50:03,002 INFO L242 Difference]: Finished difference. Result has 120 places, 109 transitions, 439 flow [2021-12-17 22:50:03,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=439, PETRI_PLACES=120, PETRI_TRANSITIONS=109} [2021-12-17 22:50:03,002 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2021-12-17 22:50:03,002 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 109 transitions, 439 flow [2021-12-17 22:50:03,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:03,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:03,003 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:03,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 22:50:03,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1592865456, now seen corresponding path program 1 times [2021-12-17 22:50:03,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:03,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378294186] [2021-12-17 22:50:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:03,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:03,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378294186] [2021-12-17 22:50:03,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378294186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492490429] [2021-12-17 22:50:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:03,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:03,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:03,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:03,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 22:50:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 22:50:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:03,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:04,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492490429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:04,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:04,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-12-17 22:50:04,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984701199] [2021-12-17 22:50:04,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:04,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 22:50:04,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 22:50:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-12-17 22:50:04,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-17 22:50:04,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 109 transitions, 439 flow. Second operand has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:04,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:04,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-17 22:50:04,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:05,443 INFO L129 PetriNetUnfolder]: 779/1904 cut-off events. [2021-12-17 22:50:05,443 INFO L130 PetriNetUnfolder]: For 3651/3651 co-relation queries the response was YES. [2021-12-17 22:50:05,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5773 conditions, 1904 events. 779/1904 cut-off events. For 3651/3651 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12419 event pairs, 0 based on Foata normal form. 39/1863 useless extension candidates. Maximal degree in co-relation 5008. Up to 363 conditions per place. [2021-12-17 22:50:05,457 INFO L132 encePairwiseOnDemand]: 89/104 looper letters, 140 selfloop transitions, 39 changer transitions 0/235 dead transitions. [2021-12-17 22:50:05,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 235 transitions, 1537 flow [2021-12-17 22:50:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 22:50:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-17 22:50:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1475 transitions. [2021-12-17 22:50:05,461 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6753663003663004 [2021-12-17 22:50:05,461 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1475 transitions. [2021-12-17 22:50:05,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1475 transitions. [2021-12-17 22:50:05,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:05,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1475 transitions. [2021-12-17 22:50:05,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 70.23809523809524) internal successors, (1475), 21 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:05,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 104.0) internal successors, (2288), 22 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:05,467 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 104.0) internal successors, (2288), 22 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:05,467 INFO L186 Difference]: Start difference. First operand has 120 places, 109 transitions, 439 flow. Second operand 21 states and 1475 transitions. [2021-12-17 22:50:05,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 235 transitions, 1537 flow [2021-12-17 22:50:05,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 235 transitions, 1537 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:50:05,475 INFO L242 Difference]: Finished difference. Result has 149 places, 134 transitions, 742 flow [2021-12-17 22:50:05,475 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=742, PETRI_PLACES=149, PETRI_TRANSITIONS=134} [2021-12-17 22:50:05,476 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 57 predicate places. [2021-12-17 22:50:05,476 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 134 transitions, 742 flow [2021-12-17 22:50:05,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:05,477 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:05,477 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:05,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 22:50:05,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:05,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1584123998, now seen corresponding path program 2 times [2021-12-17 22:50:05,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337302541] [2021-12-17 22:50:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:05,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:50:05,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:05,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337302541] [2021-12-17 22:50:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337302541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:50:05,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:50:05,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:50:05,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854189575] [2021-12-17 22:50:05,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:50:05,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:50:05,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:50:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:50:05,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-17 22:50:05,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 134 transitions, 742 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:05,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:05,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-17 22:50:05,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:05,997 INFO L129 PetriNetUnfolder]: 488/2198 cut-off events. [2021-12-17 22:50:05,997 INFO L130 PetriNetUnfolder]: For 3690/3705 co-relation queries the response was YES. [2021-12-17 22:50:06,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6144 conditions, 2198 events. 488/2198 cut-off events. For 3690/3705 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 19401 event pairs, 141 based on Foata normal form. 15/2126 useless extension candidates. Maximal degree in co-relation 5932. Up to 394 conditions per place. [2021-12-17 22:50:06,014 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 25 selfloop transitions, 5 changer transitions 0/150 dead transitions. [2021-12-17 22:50:06,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 150 transitions, 886 flow [2021-12-17 22:50:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:50:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:50:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2021-12-17 22:50:06,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.90625 [2021-12-17 22:50:06,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2021-12-17 22:50:06,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2021-12-17 22:50:06,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:06,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2021-12-17 22:50:06,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:06,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:06,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:06,018 INFO L186 Difference]: Start difference. First operand has 149 places, 134 transitions, 742 flow. Second operand 4 states and 377 transitions. [2021-12-17 22:50:06,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 150 transitions, 886 flow [2021-12-17 22:50:06,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 150 transitions, 831 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-17 22:50:06,028 INFO L242 Difference]: Finished difference. Result has 149 places, 137 transitions, 727 flow [2021-12-17 22:50:06,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=727, PETRI_PLACES=149, PETRI_TRANSITIONS=137} [2021-12-17 22:50:06,029 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 57 predicate places. [2021-12-17 22:50:06,029 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 137 transitions, 727 flow [2021-12-17 22:50:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:06,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:06,029 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:06,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:50:06,030 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:06,030 INFO L85 PathProgramCache]: Analyzing trace with hash -269577994, now seen corresponding path program 1 times [2021-12-17 22:50:06,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756773368] [2021-12-17 22:50:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:06,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:06,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756773368] [2021-12-17 22:50:06,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756773368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068878229] [2021-12-17 22:50:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:06,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:06,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:06,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:06,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 22:50:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:50:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:06,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:06,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068878229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:06,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:06,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 14 [2021-12-17 22:50:06,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314784442] [2021-12-17 22:50:06,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:06,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:50:06,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:50:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:50:06,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-17 22:50:06,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 137 transitions, 727 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:06,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:06,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-17 22:50:06,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:07,786 INFO L129 PetriNetUnfolder]: 2535/7161 cut-off events. [2021-12-17 22:50:07,787 INFO L130 PetriNetUnfolder]: For 22264/22291 co-relation queries the response was YES. [2021-12-17 22:50:07,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24957 conditions, 7161 events. 2535/7161 cut-off events. For 22264/22291 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 65756 event pairs, 908 based on Foata normal form. 34/7185 useless extension candidates. Maximal degree in co-relation 22803. Up to 2551 conditions per place. [2021-12-17 22:50:07,909 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 150 selfloop transitions, 22 changer transitions 4/241 dead transitions. [2021-12-17 22:50:07,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 241 transitions, 1781 flow [2021-12-17 22:50:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:50:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:50:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2021-12-17 22:50:07,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2021-12-17 22:50:07,911 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2021-12-17 22:50:07,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2021-12-17 22:50:07,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:07,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2021-12-17 22:50:07,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:07,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:07,914 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:07,915 INFO L186 Difference]: Start difference. First operand has 149 places, 137 transitions, 727 flow. Second operand 10 states and 763 transitions. [2021-12-17 22:50:07,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 241 transitions, 1781 flow [2021-12-17 22:50:07,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 241 transitions, 1781 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:50:07,939 INFO L242 Difference]: Finished difference. Result has 162 places, 150 transitions, 865 flow [2021-12-17 22:50:07,940 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=865, PETRI_PLACES=162, PETRI_TRANSITIONS=150} [2021-12-17 22:50:07,940 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 70 predicate places. [2021-12-17 22:50:07,940 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 150 transitions, 865 flow [2021-12-17 22:50:07,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:07,941 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:07,941 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:07,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 22:50:08,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 22:50:08,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1076800768, now seen corresponding path program 2 times [2021-12-17 22:50:08,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380490729] [2021-12-17 22:50:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:08,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:08,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380490729] [2021-12-17 22:50:08,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380490729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614377118] [2021-12-17 22:50:08,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:50:08,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:08,307 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:08,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 22:50:08,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:50:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:50:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:50:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:08,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:08,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614377118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:08,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:08,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-17 22:50:08,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725536997] [2021-12-17 22:50:08,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:08,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 22:50:08,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:08,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 22:50:08,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-17 22:50:08,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-17 22:50:08,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 150 transitions, 865 flow. Second operand has 15 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:08,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:08,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-17 22:50:08,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:10,634 INFO L129 PetriNetUnfolder]: 3877/11263 cut-off events. [2021-12-17 22:50:10,635 INFO L130 PetriNetUnfolder]: For 37914/37947 co-relation queries the response was YES. [2021-12-17 22:50:10,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40553 conditions, 11263 events. 3877/11263 cut-off events. For 37914/37947 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 112613 event pairs, 1194 based on Foata normal form. 40/11286 useless extension candidates. Maximal degree in co-relation 40301. Up to 2534 conditions per place. [2021-12-17 22:50:10,777 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 182 selfloop transitions, 38 changer transitions 4/289 dead transitions. [2021-12-17 22:50:10,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 289 transitions, 2309 flow [2021-12-17 22:50:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:50:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:50:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 848 transitions. [2021-12-17 22:50:10,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7412587412587412 [2021-12-17 22:50:10,780 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 848 transitions. [2021-12-17 22:50:10,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 848 transitions. [2021-12-17 22:50:10,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:10,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 848 transitions. [2021-12-17 22:50:10,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.0909090909091) internal successors, (848), 11 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:10,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:10,784 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:10,784 INFO L186 Difference]: Start difference. First operand has 162 places, 150 transitions, 865 flow. Second operand 11 states and 848 transitions. [2021-12-17 22:50:10,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 289 transitions, 2309 flow [2021-12-17 22:50:10,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 289 transitions, 2256 flow, removed 22 selfloop flow, removed 5 redundant places. [2021-12-17 22:50:10,832 INFO L242 Difference]: Finished difference. Result has 168 places, 166 transitions, 1034 flow [2021-12-17 22:50:10,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1034, PETRI_PLACES=168, PETRI_TRANSITIONS=166} [2021-12-17 22:50:10,832 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 76 predicate places. [2021-12-17 22:50:10,833 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 166 transitions, 1034 flow [2021-12-17 22:50:10,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:10,833 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:10,833 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:10,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 22:50:11,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:11,052 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 234098766, now seen corresponding path program 3 times [2021-12-17 22:50:11,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947564489] [2021-12-17 22:50:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:50:11,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947564489] [2021-12-17 22:50:11,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947564489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031039186] [2021-12-17 22:50:11,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:50:11,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:11,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:11,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 22:50:11,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 22:50:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:50:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:50:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:50:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:50:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031039186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:11,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:11,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-17 22:50:11,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456420408] [2021-12-17 22:50:11,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:11,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 22:50:11,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 22:50:11,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 22:50:11,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-17 22:50:11,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 166 transitions, 1034 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:11,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:11,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-17 22:50:11,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:12,561 INFO L129 PetriNetUnfolder]: 1015/5889 cut-off events. [2021-12-17 22:50:12,562 INFO L130 PetriNetUnfolder]: For 13616/14138 co-relation queries the response was YES. [2021-12-17 22:50:12,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18296 conditions, 5889 events. 1015/5889 cut-off events. For 13616/14138 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 62882 event pairs, 348 based on Foata normal form. 212/5974 useless extension candidates. Maximal degree in co-relation 18032. Up to 1187 conditions per place. [2021-12-17 22:50:12,602 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 58 selfloop transitions, 24 changer transitions 4/200 dead transitions. [2021-12-17 22:50:12,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 200 transitions, 1392 flow [2021-12-17 22:50:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:50:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:50:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2021-12-17 22:50:12,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2021-12-17 22:50:12,605 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2021-12-17 22:50:12,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2021-12-17 22:50:12,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:12,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2021-12-17 22:50:12,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:12,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:12,608 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:12,608 INFO L186 Difference]: Start difference. First operand has 168 places, 166 transitions, 1034 flow. Second operand 10 states and 843 transitions. [2021-12-17 22:50:12,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 200 transitions, 1392 flow [2021-12-17 22:50:12,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 200 transitions, 1285 flow, removed 43 selfloop flow, removed 6 redundant places. [2021-12-17 22:50:12,631 INFO L242 Difference]: Finished difference. Result has 174 places, 180 transitions, 1158 flow [2021-12-17 22:50:12,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1158, PETRI_PLACES=174, PETRI_TRANSITIONS=180} [2021-12-17 22:50:12,632 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 82 predicate places. [2021-12-17 22:50:12,632 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 180 transitions, 1158 flow [2021-12-17 22:50:12,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:12,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:12,633 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:12,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 22:50:12,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:12,866 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1173547314, now seen corresponding path program 4 times [2021-12-17 22:50:12,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:12,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032633891] [2021-12-17 22:50:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:12,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:13,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:13,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032633891] [2021-12-17 22:50:13,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032633891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:13,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532986060] [2021-12-17 22:50:13,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:50:13,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:13,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 22:50:13,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:50:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:50:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:50:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:13,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:13,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532986060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:13,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:13,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-17 22:50:13,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744850529] [2021-12-17 22:50:13,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 22:50:13,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 22:50:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-17 22:50:13,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-17 22:50:13,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 180 transitions, 1158 flow. Second operand has 15 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:13,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:13,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-17 22:50:13,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:16,261 INFO L129 PetriNetUnfolder]: 6113/17977 cut-off events. [2021-12-17 22:50:16,261 INFO L130 PetriNetUnfolder]: For 65391/65494 co-relation queries the response was YES. [2021-12-17 22:50:16,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65469 conditions, 17977 events. 6113/17977 cut-off events. For 65391/65494 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 197013 event pairs, 2330 based on Foata normal form. 110/18052 useless extension candidates. Maximal degree in co-relation 65092. Up to 7370 conditions per place. [2021-12-17 22:50:16,588 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 217 selfloop transitions, 40 changer transitions 4/326 dead transitions. [2021-12-17 22:50:16,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 326 transitions, 2764 flow [2021-12-17 22:50:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:50:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:50:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 850 transitions. [2021-12-17 22:50:16,590 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.743006993006993 [2021-12-17 22:50:16,590 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 850 transitions. [2021-12-17 22:50:16,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 850 transitions. [2021-12-17 22:50:16,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:16,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 850 transitions. [2021-12-17 22:50:16,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.27272727272727) internal successors, (850), 11 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:16,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:16,593 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:16,593 INFO L186 Difference]: Start difference. First operand has 174 places, 180 transitions, 1158 flow. Second operand 11 states and 850 transitions. [2021-12-17 22:50:16,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 326 transitions, 2764 flow [2021-12-17 22:50:16,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 326 transitions, 2702 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-12-17 22:50:16,661 INFO L242 Difference]: Finished difference. Result has 179 places, 196 transitions, 1358 flow [2021-12-17 22:50:16,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1358, PETRI_PLACES=179, PETRI_TRANSITIONS=196} [2021-12-17 22:50:16,662 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 87 predicate places. [2021-12-17 22:50:16,662 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 196 transitions, 1358 flow [2021-12-17 22:50:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:16,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:16,663 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:16,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 22:50:16,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 22:50:16,880 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1226732590, now seen corresponding path program 1 times [2021-12-17 22:50:16,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289008167] [2021-12-17 22:50:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:16,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 22:50:16,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:16,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289008167] [2021-12-17 22:50:16,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289008167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:50:16,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:50:16,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:50:16,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292745606] [2021-12-17 22:50:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:50:16,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:50:16,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:50:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:50:16,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-17 22:50:16,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 196 transitions, 1358 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:16,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:16,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-17 22:50:16,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:17,282 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([254] L49-->L51: Formula: (= (+ v_~pos~0_17 1) v_~pos~0_18) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][196], [Black: 2234#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod (+ ~i1~0 4294967295) 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (= 0 (mod ~i2~0 4294967296))), Black: 4666#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 60#L70true, 1848#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (+ (* 4294967296 (div (+ ~i2~0 4294967294) 4294967296)) 1) ~i2~0)), 2257#true, Black: 1645#true, Black: 2224#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 2228#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (= 0 (mod ~i2~0 4294967296))), 2251#(not (= ~d2~0 (* 256 (div ~d2~0 256)))), Black: 2226#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (<= (+ (* 4294967296 (div (+ ~i2~0 4294967294) 4294967296)) 1) ~i2~0)), Black: 2221#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod (+ ~i1~0 4294967295) 4294967296)) (= 0 (mod ~i2~0 4294967296))), Black: 2214#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (= 0 (mod ~i2~0 4294967296))), Black: 2212#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 2870#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 2249#true, Black: 2252#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (< 0 (+ (div ~d2~0 256) 1))), Black: 629#true, 156#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 144#(and (= (+ ~pos~0 (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ ~i1~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (* 4294967296 (div ~pos~0 4294967296)) ~pos~0)), 1115#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 4294967296 (div ~i1~0 4294967296)) (* 2 ~N~0))), 7#L94-4true, 126#true, Black: 3473#(<= ~pos~0 (+ (* 4294967296 (div (+ ~pos~0 (- 2)) 4294967296)) 2)), Black: 3472#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), Black: 1628#(and (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296))), 9#L51true, Black: 1632#(and (= 0 (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296)) (< (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) (mod (* ~N~0 2) 4294967296)) (= 0 (mod (+ ~i1~0 4294967295) 4294967296))), Black: 3471#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1107#true, 1639#(= ~d1~0 (* 256 (div ~d1~0 256))), Black: 1640#(and (<= 1 ~d1~0) (<= (div ~d1~0 256) 0)), Black: 1637#true, 4676#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), 3467#true, Black: 623#(and (< 0 (mod (* ~N~0 2) 4294967296)) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 289#(and (< 0 (mod (* ~N~0 2) 4294967296)) (= 0 (mod ~i2~0 4294967296))), Black: 150#true, 4068#true, Black: 110#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ ~pos~0 (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ ~i1~0 (* 4294967296 (div ~pos~0 4294967296))))), 635#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 4294967296 (div ~i1~0 4294967296)) (* 2 ~N~0))), Black: 4076#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 2862#true, Black: 4668#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0))]) [2021-12-17 22:50:17,282 INFO L384 tUnfolder$Statistics]: this new event has 82 ancestors and is cut-off event [2021-12-17 22:50:17,282 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2021-12-17 22:50:17,283 INFO L387 tUnfolder$Statistics]: existing Event has 75 ancestors and is cut-off event [2021-12-17 22:50:17,283 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2021-12-17 22:50:17,313 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([254] L49-->L51: Formula: (= (+ v_~pos~0_17 1) v_~pos~0_18) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][188], [Black: 2234#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod (+ ~i1~0 4294967295) 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (= 0 (mod ~i2~0 4294967296))), Black: 4666#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 1848#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (+ (* 4294967296 (div (+ ~i2~0 4294967294) 4294967296)) 1) ~i2~0)), Black: 1645#true, 2257#true, Black: 2224#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 2228#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (= 0 (mod ~i2~0 4294967296))), Black: 2226#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (<= (+ (* 4294967296 (div (+ ~i2~0 4294967294) 4294967296)) 1) ~i2~0)), Black: 2221#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod (+ ~i1~0 4294967295) 4294967296)) (= 0 (mod ~i2~0 4294967296))), Black: 2214#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (= 0 (mod ~i2~0 4294967296))), Black: 2212#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 2870#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 2251#(not (= ~d2~0 (* 256 (div ~d2~0 256)))), Black: 2249#true, 69#L73true, Black: 629#true, 156#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 144#(and (= (+ ~pos~0 (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ ~i1~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (* 4294967296 (div ~pos~0 4294967296)) ~pos~0)), 1115#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 4294967296 (div ~i1~0 4294967296)) (* 2 ~N~0))), 7#L94-4true, 126#true, 2252#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (< 0 (+ (div ~d2~0 256) 1))), Black: 3473#(<= ~pos~0 (+ (* 4294967296 (div (+ ~pos~0 (- 2)) 4294967296)) 2)), Black: 3472#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), 9#L51true, Black: 1628#(and (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 1632#(and (= 0 (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296)) (< (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) (mod (* ~N~0 2) 4294967296)) (= 0 (mod (+ ~i1~0 4294967295) 4294967296))), Black: 3471#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1107#true, 1639#(= ~d1~0 (* 256 (div ~d1~0 256))), Black: 1640#(and (<= 1 ~d1~0) (<= (div ~d1~0 256) 0)), Black: 1637#true, 3467#true, Black: 623#(and (< 0 (mod (* ~N~0 2) 4294967296)) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), 4675#(= ~d2~0 (* 256 (div ~d2~0 256))), Black: 289#(and (< 0 (mod (* ~N~0 2) 4294967296)) (= 0 (mod ~i2~0 4294967296))), 4068#true, Black: 150#true, Black: 110#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ ~pos~0 (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ ~i1~0 (* 4294967296 (div ~pos~0 4294967296))))), 2862#true, Black: 4076#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 635#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 4294967296 (div ~i1~0 4294967296)) (* 2 ~N~0))), Black: 4668#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0))]) [2021-12-17 22:50:17,314 INFO L384 tUnfolder$Statistics]: this new event has 83 ancestors and is cut-off event [2021-12-17 22:50:17,314 INFO L387 tUnfolder$Statistics]: existing Event has 83 ancestors and is cut-off event [2021-12-17 22:50:17,314 INFO L387 tUnfolder$Statistics]: existing Event has 76 ancestors and is cut-off event [2021-12-17 22:50:17,314 INFO L387 tUnfolder$Statistics]: existing Event has 83 ancestors and is cut-off event [2021-12-17 22:50:17,458 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([254] L49-->L51: Formula: (= (+ v_~pos~0_17 1) v_~pos~0_18) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][188], [Black: 2234#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod (+ ~i1~0 4294967295) 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (= 0 (mod ~i2~0 4294967296))), Black: 4666#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 1848#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (+ (* 4294967296 (div (+ ~i2~0 4294967294) 4294967296)) 1) ~i2~0)), 2257#true, Black: 2224#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 2228#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (= 0 (mod ~i2~0 4294967296))), Black: 2226#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (<= (+ (* 4294967296 (div (+ ~i2~0 4294967294) 4294967296)) 1) ~i2~0)), Black: 2221#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod (+ ~i1~0 4294967295) 4294967296)) (= 0 (mod ~i2~0 4294967296))), Black: 2214#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (= 0 (mod ~i2~0 4294967296))), Black: 2212#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), Black: 2870#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 2251#(not (= ~d2~0 (* 256 (div ~d2~0 256)))), Black: 2249#true, Black: 629#true, 1645#true, Black: 144#(and (= (+ ~pos~0 (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ ~i1~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (* 4294967296 (div ~pos~0 4294967296)) ~pos~0)), 1115#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 4294967296 (div ~i1~0 4294967296)) (* 2 ~N~0))), 7#L94-4true, 2252#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (< 0 (+ (div ~d2~0 256) 1))), Black: 3473#(<= ~pos~0 (+ (* 4294967296 (div (+ ~pos~0 (- 2)) 4294967296)) 2)), Black: 3472#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), Black: 1628#(and (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296))), 9#L51true, Black: 1632#(and (= 0 (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296)) (< (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) (mod (* ~N~0 2) 4294967296)) (= 0 (mod (+ ~i1~0 4294967295) 4294967296))), Black: 3471#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1107#true, 1639#(= ~d1~0 (* 256 (div ~d1~0 256))), Black: 1640#(and (<= 1 ~d1~0) (<= (div ~d1~0 256) 0)), Black: 1637#true, 52#L61-2true, 150#true, 3467#true, Black: 623#(and (< 0 (mod (* ~N~0 2) 4294967296)) (= 0 (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= 0 (mod ~i2~0 4294967296))), 4675#(= ~d2~0 (* 256 (div ~d2~0 256))), Black: 289#(and (< 0 (mod (* ~N~0 2) 4294967296)) (= 0 (mod ~i2~0 4294967296))), 4068#true, Black: 110#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ ~pos~0 (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div ~pos~0 4294967296)))) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ ~i1~0 (* 4294967296 (div ~pos~0 4294967296))))), Black: 4076#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 2862#true, 635#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 4294967296 (div ~i1~0 4294967296)) (* 2 ~N~0))), Black: 4668#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0))]) [2021-12-17 22:50:17,458 INFO L384 tUnfolder$Statistics]: this new event has 94 ancestors and is cut-off event [2021-12-17 22:50:17,458 INFO L387 tUnfolder$Statistics]: existing Event has 80 ancestors and is cut-off event [2021-12-17 22:50:17,459 INFO L387 tUnfolder$Statistics]: existing Event has 87 ancestors and is cut-off event [2021-12-17 22:50:17,459 INFO L387 tUnfolder$Statistics]: existing Event has 87 ancestors and is cut-off event [2021-12-17 22:50:17,531 INFO L129 PetriNetUnfolder]: 1234/5707 cut-off events. [2021-12-17 22:50:17,532 INFO L130 PetriNetUnfolder]: For 17459/17863 co-relation queries the response was YES. [2021-12-17 22:50:17,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19225 conditions, 5707 events. 1234/5707 cut-off events. For 17459/17863 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 61964 event pairs, 307 based on Foata normal form. 258/5801 useless extension candidates. Maximal degree in co-relation 19075. Up to 840 conditions per place. [2021-12-17 22:50:17,583 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 82 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2021-12-17 22:50:17,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 231 transitions, 1901 flow [2021-12-17 22:50:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:50:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:50:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2021-12-17 22:50:17,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2021-12-17 22:50:17,585 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2021-12-17 22:50:17,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2021-12-17 22:50:17,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:17,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2021-12-17 22:50:17,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:17,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:17,587 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:17,587 INFO L186 Difference]: Start difference. First operand has 179 places, 196 transitions, 1358 flow. Second operand 4 states and 375 transitions. [2021-12-17 22:50:17,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 231 transitions, 1901 flow [2021-12-17 22:50:17,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 1741 flow, removed 71 selfloop flow, removed 6 redundant places. [2021-12-17 22:50:17,617 INFO L242 Difference]: Finished difference. Result has 176 places, 188 transitions, 1236 flow [2021-12-17 22:50:17,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1236, PETRI_PLACES=176, PETRI_TRANSITIONS=188} [2021-12-17 22:50:17,617 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 84 predicate places. [2021-12-17 22:50:17,618 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 188 transitions, 1236 flow [2021-12-17 22:50:17,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:17,618 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:17,618 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:17,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 22:50:17,618 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:17,619 INFO L85 PathProgramCache]: Analyzing trace with hash 731449124, now seen corresponding path program 5 times [2021-12-17 22:50:17,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:17,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150549305] [2021-12-17 22:50:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:17,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:17,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:17,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150549305] [2021-12-17 22:50:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150549305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:17,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15727995] [2021-12-17 22:50:17,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:50:17,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:17,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:17,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:17,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 22:50:17,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 22:50:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:50:17,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:50:17,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:18,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:18,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15727995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:18,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:18,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-17 22:50:18,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352902420] [2021-12-17 22:50:18,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:18,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 22:50:18,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:18,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 22:50:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 22:50:18,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-17 22:50:18,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 188 transitions, 1236 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:18,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:18,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-17 22:50:18,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:19,370 INFO L129 PetriNetUnfolder]: 1148/6770 cut-off events. [2021-12-17 22:50:19,371 INFO L130 PetriNetUnfolder]: For 16863/17836 co-relation queries the response was YES. [2021-12-17 22:50:19,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21474 conditions, 6770 events. 1148/6770 cut-off events. For 16863/17836 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 78195 event pairs, 373 based on Foata normal form. 403/6973 useless extension candidates. Maximal degree in co-relation 19841. Up to 1019 conditions per place. [2021-12-17 22:50:19,423 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 84 selfloop transitions, 41 changer transitions 4/245 dead transitions. [2021-12-17 22:50:19,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 245 transitions, 1795 flow [2021-12-17 22:50:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:50:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:50:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 936 transitions. [2021-12-17 22:50:19,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-12-17 22:50:19,425 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 936 transitions. [2021-12-17 22:50:19,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 936 transitions. [2021-12-17 22:50:19,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:19,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 936 transitions. [2021-12-17 22:50:19,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.0909090909091) internal successors, (936), 11 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:19,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:19,428 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:19,428 INFO L186 Difference]: Start difference. First operand has 176 places, 188 transitions, 1236 flow. Second operand 11 states and 936 transitions. [2021-12-17 22:50:19,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 245 transitions, 1795 flow [2021-12-17 22:50:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 245 transitions, 1795 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:50:19,455 INFO L242 Difference]: Finished difference. Result has 191 places, 217 transitions, 1623 flow [2021-12-17 22:50:19,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1623, PETRI_PLACES=191, PETRI_TRANSITIONS=217} [2021-12-17 22:50:19,456 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 99 predicate places. [2021-12-17 22:50:19,456 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 217 transitions, 1623 flow [2021-12-17 22:50:19,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:19,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:19,456 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:19,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 22:50:19,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 22:50:19,673 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash 995455456, now seen corresponding path program 6 times [2021-12-17 22:50:19,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:19,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427783726] [2021-12-17 22:50:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:19,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:19,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427783726] [2021-12-17 22:50:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427783726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055677838] [2021-12-17 22:50:19,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:50:19,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:19,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:19,879 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:19,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 22:50:19,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 22:50:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:50:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:50:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:20,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:50:20,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055677838] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:20,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:20,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-17 22:50:20,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033167849] [2021-12-17 22:50:20,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:20,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 22:50:20,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 22:50:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-17 22:50:20,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-17 22:50:20,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 217 transitions, 1623 flow. Second operand has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:20,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:20,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-17 22:50:20,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:23,185 INFO L129 PetriNetUnfolder]: 5971/18022 cut-off events. [2021-12-17 22:50:23,185 INFO L130 PetriNetUnfolder]: For 73063/73228 co-relation queries the response was YES. [2021-12-17 22:50:23,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69219 conditions, 18022 events. 5971/18022 cut-off events. For 73063/73228 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 210179 event pairs, 2577 based on Foata normal form. 169/18146 useless extension candidates. Maximal degree in co-relation 68876. Up to 7891 conditions per place. [2021-12-17 22:50:23,511 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 249 selfloop transitions, 58 changer transitions 4/378 dead transitions. [2021-12-17 22:50:23,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 378 transitions, 3502 flow [2021-12-17 22:50:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:50:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:50:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 848 transitions. [2021-12-17 22:50:23,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7412587412587412 [2021-12-17 22:50:23,513 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 848 transitions. [2021-12-17 22:50:23,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 848 transitions. [2021-12-17 22:50:23,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:23,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 848 transitions. [2021-12-17 22:50:23,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.0909090909091) internal successors, (848), 11 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:23,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:23,516 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:23,516 INFO L186 Difference]: Start difference. First operand has 191 places, 217 transitions, 1623 flow. Second operand 11 states and 848 transitions. [2021-12-17 22:50:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 378 transitions, 3502 flow [2021-12-17 22:50:23,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 378 transitions, 3445 flow, removed 24 selfloop flow, removed 5 redundant places. [2021-12-17 22:50:23,626 INFO L242 Difference]: Finished difference. Result has 199 places, 245 transitions, 2061 flow [2021-12-17 22:50:23,627 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2061, PETRI_PLACES=199, PETRI_TRANSITIONS=245} [2021-12-17 22:50:23,627 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 107 predicate places. [2021-12-17 22:50:23,627 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 245 transitions, 2061 flow [2021-12-17 22:50:23,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:23,628 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:23,628 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:23,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 22:50:23,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 22:50:23,849 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash -207825910, now seen corresponding path program 1 times [2021-12-17 22:50:23,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:23,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475298934] [2021-12-17 22:50:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:23,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 22:50:23,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475298934] [2021-12-17 22:50:23,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475298934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:50:23,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:50:23,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:50:23,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632543084] [2021-12-17 22:50:23,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:50:23,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:50:23,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:50:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:50:23,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-17 22:50:23,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 245 transitions, 2061 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:23,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:23,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-17 22:50:23,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:50:24,342 INFO L129 PetriNetUnfolder]: 558/3840 cut-off events. [2021-12-17 22:50:24,343 INFO L130 PetriNetUnfolder]: For 12991/13540 co-relation queries the response was YES. [2021-12-17 22:50:24,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13417 conditions, 3840 events. 558/3840 cut-off events. For 12991/13540 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 39783 event pairs, 174 based on Foata normal form. 241/3984 useless extension candidates. Maximal degree in co-relation 13266. Up to 621 conditions per place. [2021-12-17 22:50:24,490 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 64 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2021-12-17 22:50:24,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 231 transitions, 2031 flow [2021-12-17 22:50:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:50:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:50:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2021-12-17 22:50:24,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8966346153846154 [2021-12-17 22:50:24,492 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2021-12-17 22:50:24,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2021-12-17 22:50:24,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:50:24,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2021-12-17 22:50:24,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:24,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:24,493 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:24,494 INFO L186 Difference]: Start difference. First operand has 199 places, 245 transitions, 2061 flow. Second operand 4 states and 373 transitions. [2021-12-17 22:50:24,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 231 transitions, 2031 flow [2021-12-17 22:50:24,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 231 transitions, 1988 flow, removed 10 selfloop flow, removed 6 redundant places. [2021-12-17 22:50:24,523 INFO L242 Difference]: Finished difference. Result has 196 places, 224 transitions, 1832 flow [2021-12-17 22:50:24,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1832, PETRI_PLACES=196, PETRI_TRANSITIONS=224} [2021-12-17 22:50:24,524 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 104 predicate places. [2021-12-17 22:50:24,524 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 224 transitions, 1832 flow [2021-12-17 22:50:24,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:24,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:50:24,524 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:50:24,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 22:50:24,524 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:50:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:50:24,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1656764867, now seen corresponding path program 7 times [2021-12-17 22:50:24,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:50:24,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084459972] [2021-12-17 22:50:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:50:24,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:50:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:24,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:50:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084459972] [2021-12-17 22:50:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084459972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:50:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282908657] [2021-12-17 22:50:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:50:24,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:50:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:50:24,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:50:24,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 22:50:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:50:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 22:50:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:50:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:26,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:50:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:50:28,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282908657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:50:28,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:50:28,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2021-12-17 22:50:28,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955669235] [2021-12-17 22:50:28,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:50:28,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 22:50:28,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:50:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 22:50:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 22:50:28,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-17 22:50:28,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 224 transitions, 1832 flow. Second operand has 39 states, 39 states have (on average 65.6923076923077) internal successors, (2562), 39 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:50:28,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:50:28,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-17 22:50:28,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:51:52,550 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (div (* c_~N~0 2) 4294967296)) (.cse7 (div c_~i1~0 4294967296))) (let ((.cse0 (* 4294967296 .cse7)) (.cse1 (* .cse7 (- 4294967296))) (.cse2 (* c_~N~0 (- 2))) (.cse3 (* .cse4 4294967296))) (and (<= (+ .cse0 (* 4294967296 (div (+ .cse1 .cse2 c_~i2~0 .cse3 4294967298) 4294967296))) (+ c_~i2~0 1)) (<= (+ c_~i2~0 (* 4294967296 .cse4) 2) (+ (* 2 c_~N~0) (* 4294967296 (div c_~i2~0 4294967296)))) (forall ((~N~0 Int)) (let ((.cse5 (mod (* ~N~0 2) 4294967296))) (or (<= .cse5 (mod c_~i1~0 4294967296)) (< (mod (+ c_~i2~0 2) 4294967296) .cse5)))) (<= (+ .cse0 (* 4294967296 (div (+ .cse1 |c_thread2Thread1of1ForFork1_#t~post4| .cse2 .cse3 4294967298) 4294967296))) (+ |c_thread2Thread1of1ForFork1_#t~post4| 1)) (forall ((~N~0 Int)) (let ((.cse6 (mod (* ~N~0 2) 4294967296))) (or (<= .cse6 (mod (+ c_~i1~0 1) 4294967296)) (< (mod (+ c_~i2~0 2) 4294967296) .cse6))))))) is different from false [2021-12-17 22:53:16,829 INFO L129 PetriNetUnfolder]: 5839/17079 cut-off events. [2021-12-17 22:53:16,830 INFO L130 PetriNetUnfolder]: For 67479/67483 co-relation queries the response was YES. [2021-12-17 22:53:16,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66096 conditions, 17079 events. 5839/17079 cut-off events. For 67479/67483 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 194139 event pairs, 337 based on Foata normal form. 227/17301 useless extension candidates. Maximal degree in co-relation 62735. Up to 4007 conditions per place. [2021-12-17 22:53:16,983 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 651 selfloop transitions, 209 changer transitions 0/923 dead transitions. [2021-12-17 22:53:16,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 923 transitions, 9723 flow [2021-12-17 22:53:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-17 22:53:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-12-17 22:53:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 5594 transitions. [2021-12-17 22:53:16,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6559568480300187 [2021-12-17 22:53:16,988 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 5594 transitions. [2021-12-17 22:53:16,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 5594 transitions. [2021-12-17 22:53:16,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:16,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 5594 transitions. [2021-12-17 22:53:16,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 68.21951219512195) internal successors, (5594), 82 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:17,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 104.0) internal successors, (8632), 83 states have internal predecessors, (8632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:17,002 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 104.0) internal successors, (8632), 83 states have internal predecessors, (8632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:17,003 INFO L186 Difference]: Start difference. First operand has 196 places, 224 transitions, 1832 flow. Second operand 82 states and 5594 transitions. [2021-12-17 22:53:17,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 923 transitions, 9723 flow [2021-12-17 22:53:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 923 transitions, 9723 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:53:17,315 INFO L242 Difference]: Finished difference. Result has 317 places, 417 transitions, 4075 flow [2021-12-17 22:53:17,315 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=4075, PETRI_PLACES=317, PETRI_TRANSITIONS=417} [2021-12-17 22:53:17,315 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 225 predicate places. [2021-12-17 22:53:17,315 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 417 transitions, 4075 flow [2021-12-17 22:53:17,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 65.6923076923077) internal successors, (2562), 39 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:17,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:17,316 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:17,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:17,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 22:53:17,521 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1843720437, now seen corresponding path program 8 times [2021-12-17 22:53:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:17,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203538778] [2021-12-17 22:53:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:17,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:17,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:17,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203538778] [2021-12-17 22:53:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203538778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:17,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160087107] [2021-12-17 22:53:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:53:17,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:17,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:17,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 22:53:18,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:53:18,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 22:53:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:25,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:33,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160087107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:33,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:33,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 39 [2021-12-17 22:53:33,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897942378] [2021-12-17 22:53:33,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:33,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 22:53:33,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:33,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 22:53:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1287, Unknown=2, NotChecked=0, Total=1482 [2021-12-17 22:53:33,151 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-17 22:53:33,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 417 transitions, 4075 flow. Second operand has 39 states, 39 states have (on average 65.87179487179488) internal successors, (2569), 39 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:33,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:33,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-17 22:53:33,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:55,515 WARN L227 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 84 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 22:54:53,984 WARN L227 SmtUtils]: Spent 9.00s on a formula simplification. DAG size of input: 88 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 22:55:16,106 WARN L227 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 99 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 22:56:32,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 22:57:03,787 INFO L129 PetriNetUnfolder]: 13247/38575 cut-off events. [2021-12-17 22:57:03,787 INFO L130 PetriNetUnfolder]: For 577325/577395 co-relation queries the response was YES. [2021-12-17 22:57:04,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224381 conditions, 38575 events. 13247/38575 cut-off events. For 577325/577395 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 504074 event pairs, 814 based on Foata normal form. 547/39092 useless extension candidates. Maximal degree in co-relation 223102. Up to 6896 conditions per place. [2021-12-17 22:57:04,486 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 1310 selfloop transitions, 542 changer transitions 0/1915 dead transitions. [2021-12-17 22:57:04,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1915 transitions, 25148 flow [2021-12-17 22:57:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-17 22:57:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-17 22:57:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5598 transitions. [2021-12-17 22:57:04,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6645299145299145 [2021-12-17 22:57:04,497 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5598 transitions. [2021-12-17 22:57:04,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5598 transitions. [2021-12-17 22:57:04,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:57:04,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5598 transitions. [2021-12-17 22:57:04,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 69.11111111111111) internal successors, (5598), 81 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:57:04,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 104.0) internal successors, (8528), 82 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:57:04,518 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 104.0) internal successors, (8528), 82 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:57:04,518 INFO L186 Difference]: Start difference. First operand has 317 places, 417 transitions, 4075 flow. Second operand 81 states and 5598 transitions. [2021-12-17 22:57:04,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1915 transitions, 25148 flow [2021-12-17 22:57:08,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1915 transitions, 24783 flow, removed 176 selfloop flow, removed 4 redundant places. [2021-12-17 22:57:08,388 INFO L242 Difference]: Finished difference. Result has 432 places, 846 transitions, 10662 flow [2021-12-17 22:57:08,389 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=10662, PETRI_PLACES=432, PETRI_TRANSITIONS=846} [2021-12-17 22:57:08,389 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 340 predicate places. [2021-12-17 22:57:08,389 INFO L470 AbstractCegarLoop]: Abstraction has has 432 places, 846 transitions, 10662 flow [2021-12-17 22:57:08,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 65.87179487179488) internal successors, (2569), 39 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:57:08,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:57:08,390 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:57:08,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-17 22:57:08,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:57:08,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:57:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:57:08,595 INFO L85 PathProgramCache]: Analyzing trace with hash 869608081, now seen corresponding path program 9 times [2021-12-17 22:57:08,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:57:08,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665820884] [2021-12-17 22:57:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:57:08,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:57:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:57:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:57:09,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:57:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665820884] [2021-12-17 22:57:09,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665820884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:57:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328211707] [2021-12-17 22:57:09,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:57:09,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:57:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:57:09,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:57:09,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 22:57:09,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 22:57:09,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:57:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 22:57:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:57:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:57:10,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:57:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:57:18,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328211707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:57:18,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:57:18,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 40 [2021-12-17 22:57:18,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846207576] [2021-12-17 22:57:18,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:57:18,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 22:57:18,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:57:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 22:57:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 22:57:18,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-17 22:57:18,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 846 transitions, 10662 flow. Second operand has 40 states, 40 states have (on average 65.775) internal successors, (2631), 40 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:57:18,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:57:18,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-17 22:57:18,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:59:38,348 INFO L129 PetriNetUnfolder]: 30905/89108 cut-off events. [2021-12-17 22:59:38,349 INFO L130 PetriNetUnfolder]: For 2523796/2523896 co-relation queries the response was YES. [2021-12-17 22:59:41,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647692 conditions, 89108 events. 30905/89108 cut-off events. For 2523796/2523896 co-relation queries the response was YES. Maximal size of possible extension queue 3957. Compared 1290061 event pairs, 1979 based on Foata normal form. 731/89757 useless extension candidates. Maximal degree in co-relation 646168. Up to 11908 conditions per place. [2021-12-17 22:59:41,800 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 1769 selfloop transitions, 1347 changer transitions 0/3179 dead transitions. [2021-12-17 22:59:41,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 3179 transitions, 47667 flow [2021-12-17 22:59:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:59:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:59:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 6717 transitions. [2021-12-17 22:59:41,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6590463108320251 [2021-12-17 22:59:41,807 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 6717 transitions. [2021-12-17 22:59:41,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 6717 transitions. [2021-12-17 22:59:41,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:59:41,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 6717 transitions. [2021-12-17 22:59:41,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 68.54081632653062) internal successors, (6717), 98 states have internal predecessors, (6717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:59:41,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 104.0) internal successors, (10296), 99 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:59:41,827 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 104.0) internal successors, (10296), 99 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:59:41,828 INFO L186 Difference]: Start difference. First operand has 432 places, 846 transitions, 10662 flow. Second operand 98 states and 6717 transitions. [2021-12-17 22:59:41,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 3179 transitions, 47667 flow