./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/recHanoi03-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/recHanoi03-2.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 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:27:03,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:27:03,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:27:03,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:27:03,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:27:03,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:27:03,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:27:03,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:27:03,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:27:03,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:27:03,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:27:03,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:27:03,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:27:03,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:27:03,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:27:03,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:27:03,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:27:03,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:27:03,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:27:03,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:27:03,940 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:27:03,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:27:03,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:27:03,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:27:03,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:27:03,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:27:03,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:27:03,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:27:03,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:27:03,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:27:03,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:27:03,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:27:03,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:27:03,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:27:03,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:27:03,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:27:03,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:27:03,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:27:03,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:27:03,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:27:03,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:27:03,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:27:03,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:27:03,980 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:27:03,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:27:03,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:27:03,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:27:03,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:27:03,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:27:03,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:27:03,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:27:03,983 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:27:03,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:27:03,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:27:03,985 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:27:03,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:27:03,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:27:03,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:27:03,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:27:03,987 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:27:03,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:27:03,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:27:03,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2022-07-19 17:27:04,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:27:04,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:27:04,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:27:04,193 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:27:04,193 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:27:04,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2022-07-19 17:27:04,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65e822b45/2c233c40d6b64e61bf77ef193f1e05e2/FLAGc5997178f [2022-07-19 17:27:04,556 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:27:04,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2022-07-19 17:27:04,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65e822b45/2c233c40d6b64e61bf77ef193f1e05e2/FLAGc5997178f [2022-07-19 17:27:04,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65e822b45/2c233c40d6b64e61bf77ef193f1e05e2 [2022-07-19 17:27:04,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:27:04,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:27:04,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:27:04,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:27:04,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:27:04,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd8de3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04, skipping insertion in model container [2022-07-19 17:27:04,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:27:04,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:27:04,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2022-07-19 17:27:04,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:27:04,735 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:27:04,744 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2022-07-19 17:27:04,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:27:04,753 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:27:04,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04 WrapperNode [2022-07-19 17:27:04,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:27:04,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:27:04,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:27:04,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:27:04,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,773 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-07-19 17:27:04,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:27:04,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:27:04,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:27:04,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:27:04,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:27:04,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:27:04,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:27:04,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:27:04,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (1/1) ... [2022-07-19 17:27:04,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:27:04,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:04,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:27:04,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:27:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:27:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-19 17:27:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-19 17:27:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:27:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:27:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:27:04,913 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:27:04,914 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:27:05,017 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:27:05,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:27:05,021 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:27:05,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:27:05 BoogieIcfgContainer [2022-07-19 17:27:05,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:27:05,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:27:05,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:27:05,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:27:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:27:04" (1/3) ... [2022-07-19 17:27:05,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b83eb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:27:05, skipping insertion in model container [2022-07-19 17:27:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:27:04" (2/3) ... [2022-07-19 17:27:05,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b83eb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:27:05, skipping insertion in model container [2022-07-19 17:27:05,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:27:05" (3/3) ... [2022-07-19 17:27:05,029 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2022-07-19 17:27:05,038 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:27:05,038 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:27:05,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:27:05,085 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6929822f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69d141bf [2022-07-19 17:27:05,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:27:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-19 17:27:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 17:27:05,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:05,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:05,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-19 17:27:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:05,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325334222] [2022-07-19 17:27:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:05,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:27:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:05,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325334222] [2022-07-19 17:27:05,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325334222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:27:05,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:27:05,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:27:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667980627] [2022-07-19 17:27:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:27:05,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:27:05,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:27:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:27:05,373 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-07-19 17:27:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:05,460 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-07-19 17:27:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:27:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2022-07-19 17:27:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:05,467 INFO L225 Difference]: With dead ends: 29 [2022-07-19 17:27:05,467 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 17:27:05,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:27:05,472 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:27:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 17:27:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-19 17:27:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 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) [2022-07-19 17:27:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-19 17:27:05,497 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-07-19 17:27:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:05,498 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-19 17:27:05,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-07-19 17:27:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-19 17:27:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 17:27:05,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:05,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:05,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:27:05,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-07-19 17:27:05,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:05,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634385035] [2022-07-19 17:27:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:05,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:05,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:05,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:27:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634385035] [2022-07-19 17:27:05,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634385035] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368380159] [2022-07-19 17:27:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:05,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:27:05,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:27:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 17:27:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:27:05,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 17:27:06,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368380159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:06,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:06,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-07-19 17:27:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663559554] [2022-07-19 17:27:06,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:06,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 17:27:06,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 17:27:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-07-19 17:27:06,027 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 17:27:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:06,126 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-19 17:27:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 17:27:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 17 [2022-07-19 17:27:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:06,127 INFO L225 Difference]: With dead ends: 28 [2022-07-19 17:27:06,127 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 17:27:06,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-07-19 17:27:06,128 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:06,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 66 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:27:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 17:27:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-19 17:27:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 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) [2022-07-19 17:27:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-19 17:27:06,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-07-19 17:27:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:06,132 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-19 17:27:06,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 17:27:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-19 17:27:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 17:27:06,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:06,133 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:06,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 17:27:06,354 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 [2022-07-19 17:27:06,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-07-19 17:27:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:06,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037481912] [2022-07-19 17:27:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:06,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:06,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:06,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:27:06,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037481912] [2022-07-19 17:27:06,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037481912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778726577] [2022-07-19 17:27:06,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:27:06,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:06,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:27:06,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:27:06,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:27:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 17:27:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:27:06,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 17:27:07,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778726577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:07,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:07,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 30 [2022-07-19 17:27:07,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983124881] [2022-07-19 17:27:07,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:07,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 17:27:07,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 17:27:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-07-19 17:27:07,708 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 17:27:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:07,920 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-19 17:27:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 17:27:07,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) Word has length 29 [2022-07-19 17:27:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:07,921 INFO L225 Difference]: With dead ends: 37 [2022-07-19 17:27:07,921 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 17:27:07,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 17:27:07,923 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:07,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:27:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 17:27:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-19 17:27:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 17:27:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-07-19 17:27:07,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2022-07-19 17:27:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:07,927 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-07-19 17:27:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 17:27:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-07-19 17:27:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 17:27:07,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:07,929 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:07,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 17:27:08,146 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 [2022-07-19 17:27:08,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 278928068, now seen corresponding path program 3 times [2022-07-19 17:27:08,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:08,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882635338] [2022-07-19 17:27:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:08,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 17:27:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:08,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882635338] [2022-07-19 17:27:08,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882635338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:08,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418429247] [2022-07-19 17:27:08,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:27:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:08,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:27:08,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 17:27:08,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 17:27:08,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 17:27:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-19 17:27:09,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 17:27:12,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418429247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:12,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:12,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 24] total 45 [2022-07-19 17:27:12,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510988166] [2022-07-19 17:27:12,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:12,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 17:27:12,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 17:27:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 17:27:12,370 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-19 17:27:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:12,991 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-19 17:27:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 17:27:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) Word has length 47 [2022-07-19 17:27:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:12,994 INFO L225 Difference]: With dead ends: 55 [2022-07-19 17:27:12,994 INFO L226 Difference]: Without dead ends: 49 [2022-07-19 17:27:12,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 17:27:12,998 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:13,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 244 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:27:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-19 17:27:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-19 17:27:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 17:27:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-19 17:27:13,009 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2022-07-19 17:27:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:13,009 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-19 17:27:13,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-19 17:27:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-19 17:27:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 17:27:13,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:13,011 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:13,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 17:27:13,211 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 [2022-07-19 17:27:13,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2030797316, now seen corresponding path program 4 times [2022-07-19 17:27:13,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:13,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419111045] [2022-07-19 17:27:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-19 17:27:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419111045] [2022-07-19 17:27:13,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419111045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307269565] [2022-07-19 17:27:13,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:27:13,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:13,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:27:13,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 17:27:13,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:27:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 17:27:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-19 17:27:15,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 17:27:30,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307269565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:30,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:30,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 42] total 75 [2022-07-19 17:27:30,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160139601] [2022-07-19 17:27:30,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:30,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-19 17:27:30,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-19 17:27:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=5001, Unknown=0, NotChecked=0, Total=5550 [2022-07-19 17:27:30,913 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 75 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 47 states have internal predecessors, (94), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) [2022-07-19 17:27:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:32,728 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-07-19 17:27:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 17:27:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 47 states have internal predecessors, (94), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) Word has length 83 [2022-07-19 17:27:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:32,729 INFO L225 Difference]: With dead ends: 91 [2022-07-19 17:27:32,729 INFO L226 Difference]: Without dead ends: 85 [2022-07-19 17:27:32,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 125 SyntacticMatches, 21 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1830, Invalid=12932, Unknown=0, NotChecked=0, Total=14762 [2022-07-19 17:27:32,733 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:32,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 728 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 17:27:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-19 17:27:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-19 17:27:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-19 17:27:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-19 17:27:32,741 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2022-07-19 17:27:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:32,741 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-19 17:27:32,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 47 states have internal predecessors, (94), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) [2022-07-19 17:27:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-19 17:27:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-19 17:27:32,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:32,747 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:32,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 17:27:32,949 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 [2022-07-19 17:27:32,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:32,951 INFO L85 PathProgramCache]: Analyzing trace with hash -341184380, now seen corresponding path program 5 times [2022-07-19 17:27:32,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052171762] [2022-07-19 17:27:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:32,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:27:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-07-19 17:27:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:34,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052171762] [2022-07-19 17:27:34,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052171762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:34,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780398160] [2022-07-19 17:27:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:27:34,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:34,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:34,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:27:34,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 17:27:35,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-19 17:27:35,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 17:27:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-07-19 17:27:43,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:27:43,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780398160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:27:43,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:27:43,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [54] total 106 [2022-07-19 17:27:43,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326969225] [2022-07-19 17:27:43,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:27:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 17:27:43,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 17:27:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=10341, Unknown=0, NotChecked=0, Total=11130 [2022-07-19 17:27:43,212 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-19 17:27:45,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 17:27:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:46,088 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-07-19 17:27:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 17:27:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2022-07-19 17:27:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:46,090 INFO L225 Difference]: With dead ends: 85 [2022-07-19 17:27:46,090 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 17:27:46,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=789, Invalid=10341, Unknown=0, NotChecked=0, Total=11130 [2022-07-19 17:27:46,093 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:46,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 443 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 17:27:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 17:27:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 17:27:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:27:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 17:27:46,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 155 [2022-07-19 17:27:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:46,094 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 17:27:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-19 17:27:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 17:27:46,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 17:27:46,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 17:27:46,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 17:27:46,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:46,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 17:27:46,306 INFO L899 garLoopResultBuilder]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2022-07-19 17:27:46,306 INFO L902 garLoopResultBuilder]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2022-07-19 17:27:46,306 INFO L899 garLoopResultBuilder]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2022-07-19 17:27:46,306 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2022-07-19 17:27:46,306 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 36) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (not (< 31 |ULTIMATE.start_main_~n~0#1|)) [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point L31-1(line 31) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 17:27:46,307 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2022-07-19 17:27:46,308 INFO L902 garLoopResultBuilder]: At program point L26(lines 26 37) the Hoare annotation is: true [2022-07-19 17:27:46,308 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2022-07-19 17:27:46,308 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-07-19 17:27:46,310 INFO L356 BasicCegarLoop]: Path program histogram: [5, 1] [2022-07-19 17:27:46,312 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 17:27:46,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 05:27:46 BoogieIcfgContainer [2022-07-19 17:27:46,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 17:27:46,317 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 17:27:46,317 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 17:27:46,317 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 17:27:46,317 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:27:05" (3/4) ... [2022-07-19 17:27:46,319 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 17:27:46,324 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2022-07-19 17:27:46,326 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-19 17:27:46,327 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-19 17:27:46,327 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 17:27:46,327 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 17:27:46,345 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 17:27:46,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 17:27:46,346 INFO L158 Benchmark]: Toolchain (without parser) took 41767.89ms. Allocated memory was 109.1MB in the beginning and 587.2MB in the end (delta: 478.2MB). Free memory was 78.6MB in the beginning and 410.0MB in the end (delta: -331.5MB). Peak memory consumption was 147.5MB. Max. memory is 16.1GB. [2022-07-19 17:27:46,346 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:27:46,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.12ms. Allocated memory is still 109.1MB. Free memory was 78.3MB in the beginning and 85.1MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 17:27:46,346 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.80ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 83.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:27:46,346 INFO L158 Benchmark]: Boogie Preprocessor took 17.12ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 83.1MB in the end (delta: 781.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:27:46,347 INFO L158 Benchmark]: RCFGBuilder took 230.49ms. Allocated memory is still 109.1MB. Free memory was 83.1MB in the beginning and 74.2MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 17:27:46,347 INFO L158 Benchmark]: TraceAbstraction took 41293.18ms. Allocated memory was 109.1MB in the beginning and 587.2MB in the end (delta: 478.2MB). Free memory was 73.7MB in the beginning and 412.1MB in the end (delta: -338.4MB). Peak memory consumption was 140.1MB. Max. memory is 16.1GB. [2022-07-19 17:27:46,347 INFO L158 Benchmark]: Witness Printer took 28.51ms. Allocated memory is still 587.2MB. Free memory was 412.1MB in the beginning and 410.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 17:27:46,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.12ms. Allocated memory is still 109.1MB. Free memory was 78.3MB in the beginning and 85.1MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.80ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 83.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.12ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 83.1MB in the end (delta: 781.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 230.49ms. Allocated memory is still 109.1MB. Free memory was 83.1MB in the beginning and 74.2MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 41293.18ms. Allocated memory was 109.1MB in the beginning and 587.2MB in the end (delta: 478.2MB). Free memory was 73.7MB in the beginning and 412.1MB in the end (delta: -338.4MB). Peak memory consumption was 140.1MB. Max. memory is 16.1GB. * Witness Printer took 28.51ms. Allocated memory is still 587.2MB. Free memory was 412.1MB in the beginning and 410.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 35]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 41.2s, OverallIterations: 6, TraceHistogramMax: 25, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 307 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 255 mSDsluCounter, 1677 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1545 mSDsCounter, 420 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2511 IncrementalHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 420 mSolverCounterUnsat, 132 mSDtfsCounter, 2511 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 811 GetRequests, 421 SyntacticMatches, 33 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5921 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=5, InterpolantAutomatonStates: 174, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 33.3s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 7127 SizeOfPredicates, 40 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 3326/5280 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 17:27:46,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE