./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o1000.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/recursive-simple/id_o1000.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 1ac5ce2c5b306e431b6746a0cb1bbdfcd1ec9c3d54097bd6037af4480ff2bd07 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:08:40,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:08:40,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:08:40,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:08:40,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:08:40,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:08:40,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:08:40,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:08:40,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:08:40,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:08:40,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:08:40,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:08:40,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:08:40,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:08:40,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:08:40,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:08:40,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:08:40,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:08:40,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:08:40,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:08:40,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:08:40,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:08:40,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:08:40,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:08:40,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:08:40,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:08:40,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:08:40,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:08:40,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:08:40,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:08:40,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:08:40,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:08:40,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:08:40,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:08:40,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:08:40,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:08:40,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:08:40,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:08:40,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:08:40,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:08:40,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:08:40,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:08:40,832 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:08:40,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:08:40,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:08:40,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:08:40,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:08:40,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:08:40,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:08:40,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:08:40,835 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:08:40,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:08:40,835 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:08:40,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:08:40,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:08:40,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:08:40,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:08:40,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:08:40,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:08:40,836 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:08:40,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:08:40,837 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:08:40,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:08:40,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:08:40,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:08:40,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:08:40,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:08:40,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:08:40,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:08:40,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:08:40,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:08:40,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:08:40,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:08:40,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:08:40,839 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:08:40,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:08:40,840 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:08:40,840 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ac5ce2c5b306e431b6746a0cb1bbdfcd1ec9c3d54097bd6037af4480ff2bd07 [2023-02-14 13:08:41,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:08:41,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:08:41,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:08:41,159 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:08:41,160 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:08:41,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o1000.c [2023-02-14 13:08:42,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:08:42,485 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:08:42,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o1000.c [2023-02-14 13:08:42,489 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84ae1005/4eba74d988f040579c5a350cb6f29581/FLAGa6a8d1197 [2023-02-14 13:08:42,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84ae1005/4eba74d988f040579c5a350cb6f29581 [2023-02-14 13:08:42,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:08:42,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:08:42,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:08:42,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:08:42,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:08:42,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1869fc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42, skipping insertion in model container [2023-02-14 13:08:42,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:08:42,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:08:42,673 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o1000.c[520,533] [2023-02-14 13:08:42,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:08:42,684 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:08:42,694 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o1000.c[520,533] [2023-02-14 13:08:42,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:08:42,705 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:08:42,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42 WrapperNode [2023-02-14 13:08:42,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:08:42,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:08:42,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:08:42,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:08:42,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,728 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-02-14 13:08:42,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:08:42,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:08:42,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:08:42,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:08:42,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:08:42,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:08:42,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:08:42,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:08:42,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (1/1) ... [2023-02-14 13:08:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:08:42,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:08:42,770 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) [2023-02-14 13:08:42,774 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 [2023-02-14 13:08:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:08:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:08:42,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:08:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:08:42,808 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-02-14 13:08:42,809 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-02-14 13:08:42,863 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:08:42,865 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:08:42,981 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:08:42,987 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:08:42,990 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 13:08:42,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:08:42 BoogieIcfgContainer [2023-02-14 13:08:42,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:08:42,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:08:42,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:08:42,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:08:42,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:08:42" (1/3) ... [2023-02-14 13:08:42,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e974bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:08:42, skipping insertion in model container [2023-02-14 13:08:42,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:08:42" (2/3) ... [2023-02-14 13:08:42,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e974bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:08:42, skipping insertion in model container [2023-02-14 13:08:42,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:08:42" (3/3) ... [2023-02-14 13:08:43,003 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2023-02-14 13:08:43,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:08:43,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:08:43,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:08:43,097 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8b79089, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:08:43,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:08:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:08:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 13:08:43,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:08:43,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:08:43,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:08:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:08:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2023-02-14 13:08:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:08:43,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198188269] [2023-02-14 13:08:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:08:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:08:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:08:43,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:08:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198188269] [2023-02-14 13:08:43,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198188269] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:08:43,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:08:43,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:08:43,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737311993] [2023-02-14 13:08:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:08:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:08:43,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:08:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:08:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:08:43,516 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:08:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:08:43,595 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-14 13:08:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:08:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-02-14 13:08:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:08:43,604 INFO L225 Difference]: With dead ends: 28 [2023-02-14 13:08:43,605 INFO L226 Difference]: Without dead ends: 15 [2023-02-14 13:08:43,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:08:43,614 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:08:43,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:08:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-14 13:08:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-14 13:08:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:08:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-02-14 13:08:43,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-02-14 13:08:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:08:43,655 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-02-14 13:08:43,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:08:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-02-14 13:08:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 13:08:43,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:08:43,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:08:43,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:08:43,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:08:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:08:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2023-02-14 13:08:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:08:43,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579354930] [2023-02-14 13:08:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:08:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:08:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:43,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:43,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:08:43,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:08:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579354930] [2023-02-14 13:08:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579354930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:08:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224143648] [2023-02-14 13:08:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:08:43,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:08:43,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:08:43,951 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) [2023-02-14 13:08:43,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:08:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 13:08:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:08:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:08:44,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:08:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:08:44,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224143648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:08:44,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:08:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 13:08:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410534201] [2023-02-14 13:08:44,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:08:44,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 13:08:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:08:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 13:08:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:08:44,292 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 13:08:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:08:44,345 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-02-14 13:08:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:08:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2023-02-14 13:08:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:08:44,347 INFO L225 Difference]: With dead ends: 27 [2023-02-14 13:08:44,347 INFO L226 Difference]: Without dead ends: 21 [2023-02-14 13:08:44,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:08:44,349 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:08:44,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:08:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-14 13:08:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-14 13:08:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 13:08:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-14 13:08:44,355 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-02-14 13:08:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:08:44,355 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-14 13:08:44,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 13:08:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-14 13:08:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 13:08:44,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:08:44,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:08:44,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 13:08:44,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:08:44,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:08:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:08:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2023-02-14 13:08:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:08:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683991903] [2023-02-14 13:08:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:08:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:08:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:44,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:44,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:08:45,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:08:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683991903] [2023-02-14 13:08:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683991903] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:08:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071646618] [2023-02-14 13:08:45,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:08:45,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:08:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:08:45,017 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) [2023-02-14 13:08:45,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:08:45,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:08:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:08:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:08:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:08:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:08:45,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:08:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:08:45,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071646618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:08:45,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:08:45,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-14 13:08:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694889057] [2023-02-14 13:08:45,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:08:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:08:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:08:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:08:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:08:45,492 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-14 13:08:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:08:45,701 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-02-14 13:08:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 13:08:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2023-02-14 13:08:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:08:45,703 INFO L225 Difference]: With dead ends: 39 [2023-02-14 13:08:45,703 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 13:08:45,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:08:45,705 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:08:45,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:08:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 13:08:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-14 13:08:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-14 13:08:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-14 13:08:45,711 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-02-14 13:08:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:08:45,711 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-14 13:08:45,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-14 13:08:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-14 13:08:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 13:08:45,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:08:45,713 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:08:45,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 13:08:45,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 13:08:45,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:08:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:08:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2023-02-14 13:08:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:08:45,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355658827] [2023-02-14 13:08:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:08:45,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:08:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-14 13:08:46,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:08:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355658827] [2023-02-14 13:08:46,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355658827] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:08:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328661559] [2023-02-14 13:08:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:08:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:08:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:08:46,576 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) [2023-02-14 13:08:46,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:08:46,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-14 13:08:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:08:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-14 13:08:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:08:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-14 13:08:46,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:08:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-14 13:08:47,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328661559] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:08:47,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:08:47,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-14 13:08:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275003852] [2023-02-14 13:08:47,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:08:47,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-14 13:08:47,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:08:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-14 13:08:47,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 13:08:47,600 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-14 13:08:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:08:51,177 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-02-14 13:08:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 13:08:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2023-02-14 13:08:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:08:51,179 INFO L225 Difference]: With dead ends: 63 [2023-02-14 13:08:51,179 INFO L226 Difference]: Without dead ends: 57 [2023-02-14 13:08:51,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 13:08:51,181 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:08:51,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:08:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-14 13:08:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-14 13:08:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-02-14 13:08:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-14 13:08:51,198 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2023-02-14 13:08:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:08:51,199 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-14 13:08:51,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-14 13:08:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-14 13:08:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 13:08:51,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:08:51,203 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:08:51,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:08:51,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:08:51,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:08:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:08:51,410 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2023-02-14 13:08:51,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:08:51,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182277424] [2023-02-14 13:08:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:08:51,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:08:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:52,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:08:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:08:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-14 13:08:53,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:08:53,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182277424] [2023-02-14 13:08:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182277424] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:08:53,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322481569] [2023-02-14 13:08:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:08:53,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:08:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:08:53,693 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) [2023-02-14 13:08:53,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:08:53,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:08:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:08:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-14 13:08:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:08:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-14 13:08:53,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:08:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-14 13:08:56,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322481569] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:08:56,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:08:56,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-14 13:08:56,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387396770] [2023-02-14 13:08:56,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:08:56,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-14 13:08:56,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:08:56,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-14 13:08:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2023-02-14 13:08:56,685 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-14 13:09:16,213 WARN L233 SmtUtils]: Spent 13.45s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:09:35,202 WARN L233 SmtUtils]: Spent 10.85s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:09:52,131 WARN L233 SmtUtils]: Spent 11.49s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:10:05,975 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:10:14,087 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:10:26,640 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:10:33,944 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:10:47,943 WARN L233 SmtUtils]: Spent 11.57s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:11:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:11:18,546 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-02-14 13:11:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-14 13:11:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2023-02-14 13:11:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:11:18,549 INFO L225 Difference]: With dead ends: 111 [2023-02-14 13:11:18,549 INFO L226 Difference]: Without dead ends: 105 [2023-02-14 13:11:18,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 143.0s TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2023-02-14 13:11:18,556 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:11:18,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 985 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 13:11:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-14 13:11:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-14 13:11:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2023-02-14 13:11:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-14 13:11:18,586 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2023-02-14 13:11:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:11:18,588 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-14 13:11:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-14 13:11:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-14 13:11:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-14 13:11:18,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:11:18,591 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:11:18,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 13:11:18,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:11:18,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:11:18,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:11:18,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 5 times [2023-02-14 13:11:18,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:11:18,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971766919] [2023-02-14 13:11:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:11:18,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:11:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:19,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:20,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:23,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:23,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:23,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:24,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:24,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:24,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:24,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:25,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:25,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:25,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:25,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:26,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-14 13:11:27,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:11:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971766919] [2023-02-14 13:11:27,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971766919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:11:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031139710] [2023-02-14 13:11:27,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:11:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:11:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:11:27,891 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) [2023-02-14 13:11:27,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:11:38,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-02-14 13:11:38,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:11:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-14 13:11:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:11:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-14 13:11:38,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:11:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-14 13:11:47,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031139710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:11:47,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:11:47,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-14 13:11:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50820956] [2023-02-14 13:11:47,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:11:47,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-14 13:11:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:11:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-14 13:11:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=15304, Unknown=0, NotChecked=0, Total=17556 [2023-02-14 13:11:47,207 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 1.0451127819548873) internal successors, (139), 69 states have internal predecessors, (139), 1 states have call successors, (2), 1 states have call predecessors, (2), 64 states have return successors, (64), 64 states have call predecessors, (64), 1 states have call successors, (64) [2023-02-14 13:11:50,986 WARN L837 $PredicateComparison]: unable to prove that (and (not (= 1000 (mod (+ |c_id_#t~ret4| 27) 4294967296))) (not (= 1000 (mod (+ 22 |c_id_#t~ret4|) 4294967296))) (not (= (mod (+ 26 |c_id_#t~ret4|) 4294967296) 1000)) (not (= 1000 (mod (+ 7 |c_id_#t~ret4|) 4294967296))) (not (= 1000 (mod (+ 31 |c_id_#t~ret4|) 4294967296))) (not (= 1000 (mod (+ 8 |c_id_#t~ret4|) 4294967296))) (not (= (mod (+ 5 |c_id_#t~ret4|) 4294967296) 1000)) (not (= 1000 (mod (+ 12 |c_id_#t~ret4|) 4294967296))) (not (= (mod (+ 3 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ |c_id_#t~ret4| 24) 4294967296) 1000)) (not (= 1000 (mod (+ 25 |c_id_#t~ret4|) 4294967296))) (not (= (mod (+ 20 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 14 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 10 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 6 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 15 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 23 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 30 |c_id_#t~ret4|) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#t~ret4| 1) 4294967296))) (not (= (mod (+ 4 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 28 |c_id_#t~ret4|) 4294967296) 1000)) (not (= 1000 (mod (+ 11 |c_id_#t~ret4|) 4294967296))) (not (= (mod (+ 21 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 19 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 16 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 2 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 17 |c_id_#t~ret4|) 4294967296) 1000)) (not (= (mod (+ 13 |c_id_#t~ret4|) 4294967296) 1000)) (not (= 1000 (mod (+ 29 |c_id_#t~ret4|) 4294967296))) (not (= (mod (+ 9 |c_id_#t~ret4|) 4294967296) 1000)) (not (= 1000 (mod (+ 18 |c_id_#t~ret4|) 4294967296)))) is different from false [2023-02-14 13:11:53,021 WARN L837 $PredicateComparison]: unable to prove that (and (not (= (mod (+ |c_id_#res| 14) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 13) 4294967296))) (not (= 1000 (mod (+ |c_id_#res| 2) 4294967296))) (not (= (mod (+ |c_id_#res| 25) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 7) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 21) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 18) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 16) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 17) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 8) 4294967296))) (not (= (mod (+ |c_id_#res| 12) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 11) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 29) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 1) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 26) 4294967296))) (not (= (mod (+ |c_id_#res| 23) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 24) 4294967296))) (not (= 1000 (mod (+ |c_id_#res| 19) 4294967296))) (not (= 1000 (mod (+ |c_id_#res| 9) 4294967296))) (not (= (mod (+ |c_id_#res| 15) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 28) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 3) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 6) 4294967296))) (not (= (mod |c_id_#res| 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 22) 4294967296))) (not (= (mod (+ |c_id_#res| 27) 4294967296) 1000)) (not (= (mod (+ |c_id_#res| 20) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 4) 4294967296))) (not (= (mod (+ |c_id_#res| 10) 4294967296) 1000)) (not (= 1000 (mod (+ |c_id_#res| 30) 4294967296))) (not (= (mod (+ |c_id_#res| 5) 4294967296) 1000))) is different from false