./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/loop-simple/nested_4.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 fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:58:16,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:58:16,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:58:16,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:58:16,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:58:16,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:58:16,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:58:16,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:58:16,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:58:16,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:58:16,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:58:16,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:58:16,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:58:16,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:58:16,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:58:16,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:58:16,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:58:16,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:58:16,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:58:16,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:58:16,091 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:58:16,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:58:16,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:58:16,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:58:16,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:58:16,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:58:16,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:58:16,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:58:16,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:58:16,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:58:16,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:58:16,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:58:16,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:58:16,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:58:16,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:58:16,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:58:16,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:58:16,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:58:16,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:58:16,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:58:16,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:58:16,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:58:16,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:58:16,151 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:58:16,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:58:16,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:58:16,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:58:16,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:58:16,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:58:16,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:58:16,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:58:16,154 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:58:16,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:58:16,155 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:58:16,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:58:16,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:58:16,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:58:16,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:58:16,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:58:16,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:58:16,156 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:58:16,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:58:16,157 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:58:16,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:58:16,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:58:16,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:58:16,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:58:16,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:58:16,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:58:16,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:58:16,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:58:16,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:58:16,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:58:16,159 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:58:16,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:58:16,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:58:16,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2022-07-21 02:58:16,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:58:16,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:58:16,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:58:16,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:58:16,509 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:58:16,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_4.c [2022-07-21 02:58:16,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc028d232/84b78607d06d4873a4eed95e90b5de76/FLAGb2d0c4904 [2022-07-21 02:58:16,967 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:58:16,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c [2022-07-21 02:58:16,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc028d232/84b78607d06d4873a4eed95e90b5de76/FLAGb2d0c4904 [2022-07-21 02:58:17,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc028d232/84b78607d06d4873a4eed95e90b5de76 [2022-07-21 02:58:17,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:58:17,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:58:17,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:58:17,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:58:17,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:58:17,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce0d300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17, skipping insertion in model container [2022-07-21 02:58:17,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:58:17,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:58:17,554 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/loop-simple/nested_4.c[841,854] [2022-07-21 02:58:17,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:58:17,567 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:58:17,587 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/loop-simple/nested_4.c[841,854] [2022-07-21 02:58:17,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:58:17,600 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:58:17,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17 WrapperNode [2022-07-21 02:58:17,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:58:17,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:58:17,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:58:17,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:58:17,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,629 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2022-07-21 02:58:17,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:58:17,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:58:17,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:58:17,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:58:17,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:58:17,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:58:17,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:58:17,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:58:17,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (1/1) ... [2022-07-21 02:58:17,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:58:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:17,688 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) [2022-07-21 02:58:17,720 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 [2022-07-21 02:58:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:58:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:58:17,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:58:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:58:17,798 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:58:17,800 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:58:17,936 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:58:17,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:58:17,941 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 02:58:17,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:58:17 BoogieIcfgContainer [2022-07-21 02:58:17,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:58:17,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:58:17,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:58:17,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:58:17,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:58:17" (1/3) ... [2022-07-21 02:58:17,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d1a33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:58:17, skipping insertion in model container [2022-07-21 02:58:17,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:58:17" (2/3) ... [2022-07-21 02:58:17,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d1a33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:58:17, skipping insertion in model container [2022-07-21 02:58:17,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:58:17" (3/3) ... [2022-07-21 02:58:17,950 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2022-07-21 02:58:17,967 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:58:17,967 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:58:18,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:58:18,041 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@7ac8b1f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58068168 [2022-07-21 02:58:18,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:58:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2022-07-21 02:58:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 02:58:18,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 02:58:18,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2022-07-21 02:58:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252603249] [2022-07-21 02:58:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:18,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252603249] [2022-07-21 02:58:18,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252603249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:58:18,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:58:18,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:58:18,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743917077] [2022-07-21 02:58:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:58:18,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:58:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:58:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:58:18,232 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-21 02:58:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:18,245 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2022-07-21 02:58:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:58:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2022-07-21 02:58:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:18,253 INFO L225 Difference]: With dead ends: 32 [2022-07-21 02:58:18,253 INFO L226 Difference]: Without dead ends: 13 [2022-07-21 02:58:18,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:58:18,259 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:18,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-21 02:58:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-21 02:58:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-07-21 02:58:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-07-21 02:58:18,293 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2022-07-21 02:58:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:18,293 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-07-21 02:58:18,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-21 02:58:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-07-21 02:58:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 02:58:18,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 02:58:18,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:58:18,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2022-07-21 02:58:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667571618] [2022-07-21 02:58:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667571618] [2022-07-21 02:58:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667571618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:58:18,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:58:18,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:58:18,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429118034] [2022-07-21 02:58:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:58:18,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:58:18,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:58:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,365 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-21 02:58:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:18,392 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-07-21 02:58:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:58:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2022-07-21 02:58:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:18,394 INFO L225 Difference]: With dead ends: 24 [2022-07-21 02:58:18,394 INFO L226 Difference]: Without dead ends: 21 [2022-07-21 02:58:18,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,398 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:18,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-21 02:58:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-07-21 02:58:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-07-21 02:58:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-07-21 02:58:18,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2022-07-21 02:58:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:18,402 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-07-21 02:58:18,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-21 02:58:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-07-21 02:58:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 02:58:18,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:58:18,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:58:18,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2022-07-21 02:58:18,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:18,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330853389] [2022-07-21 02:58:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:18,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330853389] [2022-07-21 02:58:18,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330853389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:58:18,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:58:18,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:58:18,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16795571] [2022-07-21 02:58:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:58:18,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:58:18,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:58:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,457 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-21 02:58:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:18,474 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-07-21 02:58:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:58:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2022-07-21 02:58:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:18,476 INFO L225 Difference]: With dead ends: 31 [2022-07-21 02:58:18,476 INFO L226 Difference]: Without dead ends: 20 [2022-07-21 02:58:18,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,481 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:18,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-21 02:58:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-07-21 02:58:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-07-21 02:58:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-07-21 02:58:18,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-07-21 02:58:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:18,495 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-07-21 02:58:18,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-21 02:58:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-07-21 02:58:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 02:58:18,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:58:18,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 02:58:18,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2022-07-21 02:58:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779002365] [2022-07-21 02:58:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:18,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779002365] [2022-07-21 02:58:18,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779002365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:58:18,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:58:18,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:58:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399388682] [2022-07-21 02:58:18,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:58:18,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:58:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:58:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,550 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-21 02:58:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:18,566 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-07-21 02:58:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:58:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2022-07-21 02:58:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:18,567 INFO L225 Difference]: With dead ends: 31 [2022-07-21 02:58:18,568 INFO L226 Difference]: Without dead ends: 19 [2022-07-21 02:58:18,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,569 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:18,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-21 02:58:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2022-07-21 02:58:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-07-21 02:58:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-21 02:58:18,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-07-21 02:58:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:18,576 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-21 02:58:18,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-21 02:58:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-21 02:58:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 02:58:18,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:58:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 02:58:18,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2022-07-21 02:58:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:18,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868691873] [2022-07-21 02:58:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:18,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868691873] [2022-07-21 02:58:18,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868691873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:58:18,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:58:18,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:58:18,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916375259] [2022-07-21 02:58:18,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:58:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:58:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:58:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,610 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 02:58:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:18,624 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-07-21 02:58:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:58:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) Word has length 14 [2022-07-21 02:58:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:18,626 INFO L225 Difference]: With dead ends: 31 [2022-07-21 02:58:18,626 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 02:58:18,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:58:18,627 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:18,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 02:58:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-21 02:58:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-07-21 02:58:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-21 02:58:18,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2022-07-21 02:58:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:18,634 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-21 02:58:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 02:58:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-21 02:58:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 02:58:18,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:58:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 02:58:18,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2022-07-21 02:58:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859620162] [2022-07-21 02:58:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859620162] [2022-07-21 02:58:18,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859620162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:58:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521788017] [2022-07-21 02:58:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:18,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:18,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:18,681 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) [2022-07-21 02:58:18,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:58:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 02:58:18,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:58:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:58:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:18,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521788017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:58:18,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:58:18,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-21 02:58:18,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554372763] [2022-07-21 02:58:18,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:58:18,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 02:58:18,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 02:58:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:58:18,780 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-07-21 02:58:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:18,817 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-21 02:58:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 02:58:18,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) Word has length 16 [2022-07-21 02:58:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:18,819 INFO L225 Difference]: With dead ends: 37 [2022-07-21 02:58:18,819 INFO L226 Difference]: Without dead ends: 23 [2022-07-21 02:58:18,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-21 02:58:18,820 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:18,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-21 02:58:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-21 02:58:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-07-21 02:58:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-21 02:58:18,824 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2022-07-21 02:58:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:18,824 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-21 02:58:18,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-07-21 02:58:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-21 02:58:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 02:58:18,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:18,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:58:18,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:58:19,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 02:58:19,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash -430063434, now seen corresponding path program 2 times [2022-07-21 02:58:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747900906] [2022-07-21 02:58:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 02:58:19,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:19,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747900906] [2022-07-21 02:58:19,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747900906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:58:19,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275295304] [2022-07-21 02:58:19,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:58:19,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:19,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:19,073 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) [2022-07-21 02:58:19,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:58:19,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:58:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:58:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 02:58:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:58:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:19,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:58:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:58:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275295304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:58:19,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:58:19,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-07-21 02:58:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318480800] [2022-07-21 02:58:19,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:58:19,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 02:58:19,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 02:58:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 02:58:19,216 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-21 02:58:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:19,384 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-07-21 02:58:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 02:58:19,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) Word has length 22 [2022-07-21 02:58:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:19,386 INFO L225 Difference]: With dead ends: 76 [2022-07-21 02:58:19,386 INFO L226 Difference]: Without dead ends: 56 [2022-07-21 02:58:19,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:58:19,387 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:19,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:58:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-21 02:58:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2022-07-21 02:58:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2022-07-21 02:58:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-21 02:58:19,411 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2022-07-21 02:58:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:19,411 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-21 02:58:19,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-21 02:58:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-21 02:58:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 02:58:19,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:19,413 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:58:19,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:58:19,627 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,SelfDestructingSolverStorable6 [2022-07-21 02:58:19,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -340835222, now seen corresponding path program 3 times [2022-07-21 02:58:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988519486] [2022-07-21 02:58:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-21 02:58:19,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988519486] [2022-07-21 02:58:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988519486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:58:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212397073] [2022-07-21 02:58:19,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 02:58:19,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:19,699 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) [2022-07-21 02:58:19,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:58:19,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 02:58:19,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:58:19,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 02:58:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:58:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-21 02:58:19,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:58:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-21 02:58:19,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212397073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:58:19,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:58:19,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-21 02:58:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877097180] [2022-07-21 02:58:19,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:58:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 02:58:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 02:58:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:58:19,899 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2022-07-21 02:58:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:20,033 INFO L93 Difference]: Finished difference Result 449 states and 500 transitions. [2022-07-21 02:58:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 02:58:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) Word has length 41 [2022-07-21 02:58:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:20,040 INFO L225 Difference]: With dead ends: 449 [2022-07-21 02:58:20,040 INFO L226 Difference]: Without dead ends: 410 [2022-07-21 02:58:20,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-07-21 02:58:20,045 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 200 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:20,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 53 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-21 02:58:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 282. [2022-07-21 02:58:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.103202846975089) internal successors, (310), 281 states have internal predecessors, (310), 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) [2022-07-21 02:58:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 310 transitions. [2022-07-21 02:58:20,089 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 310 transitions. Word has length 41 [2022-07-21 02:58:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:20,089 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 310 transitions. [2022-07-21 02:58:20,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2022-07-21 02:58:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 310 transitions. [2022-07-21 02:58:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-21 02:58:20,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:20,095 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 02:58:20,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 02:58:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:20,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1674088742, now seen corresponding path program 4 times [2022-07-21 02:58:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320290796] [2022-07-21 02:58:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2022-07-21 02:58:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320290796] [2022-07-21 02:58:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320290796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:58:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291796399] [2022-07-21 02:58:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 02:58:20,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:20,544 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) [2022-07-21 02:58:20,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 02:58:20,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 02:58:20,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:58:20,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:58:20,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:58:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2022-07-21 02:58:20,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:58:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2022-07-21 02:58:20,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291796399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:58:20,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:58:20,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-21 02:58:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423849258] [2022-07-21 02:58:20,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:58:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:58:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:58:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:58:20,834 INFO L87 Difference]: Start difference. First operand 282 states and 310 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) [2022-07-21 02:58:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:20,908 INFO L93 Difference]: Finished difference Result 1009 states and 1126 transitions. [2022-07-21 02:58:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:58:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) Word has length 281 [2022-07-21 02:58:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:20,912 INFO L225 Difference]: With dead ends: 1009 [2022-07-21 02:58:20,912 INFO L226 Difference]: Without dead ends: 762 [2022-07-21 02:58:20,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:58:20,918 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:20,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-07-21 02:58:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 762. [2022-07-21 02:58:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.0801576872536136) internal successors, (822), 761 states have internal predecessors, (822), 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) [2022-07-21 02:58:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 822 transitions. [2022-07-21 02:58:21,003 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 822 transitions. Word has length 281 [2022-07-21 02:58:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:21,004 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 822 transitions. [2022-07-21 02:58:21,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) [2022-07-21 02:58:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 822 transitions. [2022-07-21 02:58:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-07-21 02:58:21,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:21,026 INFO L195 NwaCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 02:58:21,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 02:58:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:21,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 388372774, now seen corresponding path program 5 times [2022-07-21 02:58:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513182161] [2022-07-21 02:58:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 37783 proven. 3149 refuted. 0 times theorem prover too weak. 59454 trivial. 0 not checked. [2022-07-21 02:58:21,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:21,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513182161] [2022-07-21 02:58:21,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513182161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:58:21,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598223924] [2022-07-21 02:58:21,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 02:58:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:21,676 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) [2022-07-21 02:58:21,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 02:58:21,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2022-07-21 02:58:21,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:58:21,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 02:58:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:58:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2022-07-21 02:58:22,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:58:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2022-07-21 02:58:22,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598223924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:58:22,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:58:22,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-21 02:58:22,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314998632] [2022-07-21 02:58:22,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:58:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 02:58:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 02:58:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:58:22,395 INFO L87 Difference]: Start difference. First operand 762 states and 822 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2022-07-21 02:58:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:22,574 INFO L93 Difference]: Finished difference Result 2822 states and 3055 transitions. [2022-07-21 02:58:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 02:58:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) Word has length 761 [2022-07-21 02:58:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:22,586 INFO L225 Difference]: With dead ends: 2822 [2022-07-21 02:58:22,586 INFO L226 Difference]: Without dead ends: 2250 [2022-07-21 02:58:22,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1518 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-21 02:58:22,589 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:22,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 62 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-07-21 02:58:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2022-07-21 02:58:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.0769230769230769) internal successors, (2422), 2249 states have internal predecessors, (2422), 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) [2022-07-21 02:58:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2422 transitions. [2022-07-21 02:58:22,766 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2422 transitions. Word has length 761 [2022-07-21 02:58:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:22,768 INFO L495 AbstractCegarLoop]: Abstraction has 2250 states and 2422 transitions. [2022-07-21 02:58:22,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2022-07-21 02:58:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2422 transitions. [2022-07-21 02:58:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2250 [2022-07-21 02:58:22,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:58:22,882 INFO L195 NwaCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 02:58:22,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 02:58:23,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 02:58:23,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:58:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:58:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 994878758, now seen corresponding path program 6 times [2022-07-21 02:58:23,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:58:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492054040] [2022-07-21 02:58:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:58:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:58:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:58:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 0 proven. 679846 refuted. 0 times theorem prover too weak. 225492 trivial. 0 not checked. [2022-07-21 02:58:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:58:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492054040] [2022-07-21 02:58:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492054040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:58:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462361157] [2022-07-21 02:58:25,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 02:58:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:58:25,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 02:58:25,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 02:58:26,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 377 check-sat command(s) [2022-07-21 02:58:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:58:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 02:58:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:58:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 356105 proven. 0 refuted. 0 times theorem prover too weak. 549233 trivial. 0 not checked. [2022-07-21 02:58:28,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 02:58:28,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462361157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:58:28,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 02:58:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 19 [2022-07-21 02:58:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216238432] [2022-07-21 02:58:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:58:28,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 02:58:28,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:58:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 02:58:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:58:28,111 INFO L87 Difference]: Start difference. First operand 2250 states and 2422 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2022-07-21 02:58:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:58:28,357 INFO L93 Difference]: Finished difference Result 2250 states and 2422 transitions. [2022-07-21 02:58:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 02:58:28,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) Word has length 2249 [2022-07-21 02:58:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:58:28,361 INFO L225 Difference]: With dead ends: 2250 [2022-07-21 02:58:28,361 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:58:28,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2255 GetRequests, 2238 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-07-21 02:58:28,365 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:58:28,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:58:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:58:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:58:28,366 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) [2022-07-21 02:58:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:58:28,367 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2249 [2022-07-21 02:58:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:58:28,367 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:58:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2022-07-21 02:58:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:58:28,368 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:58:28,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:58:28,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 02:58:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:58:28,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 02:59:01,217 WARN L233 SmtUtils]: Spent 32.62s on a formula simplification. DAG size of input: 1225 DAG size of output: 1200 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-07-21 02:59:23,670 WARN L233 SmtUtils]: Spent 21.79s on a formula simplification. DAG size of input: 1200 DAG size of output: 11 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-07-21 02:59:24,553 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2022-07-21 02:59:24,553 INFO L899 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2022-07-21 02:59:24,553 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (not (< |ULTIMATE.start_main_~d~0#1| 6)) (not (< |ULTIMATE.start_main_~c~0#1| 6)) (< |ULTIMATE.start_main_~a~0#1| 6) (< |ULTIMATE.start_main_~d~0#1| 7) (< |ULTIMATE.start_main_~b~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 7)) [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L895 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (not (< |ULTIMATE.start_main_~d~0#1| 6)) (< |ULTIMATE.start_main_~b~0#1| 6) (< |ULTIMATE.start_main_~a~0#1| 6) (< |ULTIMATE.start_main_~d~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 7)) [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L899 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2022-07-21 02:59:24,554 INFO L895 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< |ULTIMATE.start_main_~b~0#1| 6) (< |ULTIMATE.start_main_~a~0#1| 6) (< |ULTIMATE.start_main_~d~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 6)) [2022-07-21 02:59:24,554 INFO L902 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2022-07-21 02:59:24,555 INFO L899 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2022-07-21 02:59:24,556 INFO L895 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (not (< |ULTIMATE.start_main_~d~0#1| 6)) (not (< |ULTIMATE.start_main_~b~0#1| 6)) (not (< |ULTIMATE.start_main_~c~0#1| 6)) (< |ULTIMATE.start_main_~a~0#1| 7) (< |ULTIMATE.start_main_~d~0#1| 7) (< |ULTIMATE.start_main_~b~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 7)) [2022-07-21 02:59:24,556 INFO L899 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2022-07-21 02:59:24,559 INFO L356 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1] [2022-07-21 02:59:24,560 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 02:59:24,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:59:24 BoogieIcfgContainer [2022-07-21 02:59:24,579 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 02:59:24,580 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 02:59:24,580 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 02:59:24,580 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 02:59:24,581 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:58:17" (3/4) ... [2022-07-21 02:59:24,583 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 02:59:24,590 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2022-07-21 02:59:24,591 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-21 02:59:24,591 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 02:59:24,591 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 02:59:24,619 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 02:59:24,619 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 02:59:24,619 INFO L158 Benchmark]: Toolchain (without parser) took 67222.48ms. Allocated memory was 50.3MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 25.5MB in the beginning and 416.4MB in the end (delta: -390.8MB). Peak memory consumption was 633.2MB. Max. memory is 16.1GB. [2022-07-21 02:59:24,620 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 32.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:59:24,620 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.45ms. Allocated memory was 50.3MB in the beginning and 62.9MB in the end (delta: 12.6MB). Free memory was 25.3MB in the beginning and 39.4MB in the end (delta: -14.1MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2022-07-21 02:59:24,620 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.18ms. Allocated memory is still 62.9MB. Free memory was 39.4MB in the beginning and 38.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:59:24,621 INFO L158 Benchmark]: Boogie Preprocessor took 26.05ms. Allocated memory is still 62.9MB. Free memory was 37.9MB in the beginning and 36.9MB in the end (delta: 942.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:59:24,622 INFO L158 Benchmark]: RCFGBuilder took 286.13ms. Allocated memory is still 62.9MB. Free memory was 36.9MB in the beginning and 45.2MB in the end (delta: -8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 02:59:24,623 INFO L158 Benchmark]: TraceAbstraction took 66634.50ms. Allocated memory was 62.9MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 44.7MB in the beginning and 419.5MB in the end (delta: -374.8MB). Peak memory consumption was 846.7MB. Max. memory is 16.1GB. [2022-07-21 02:59:24,623 INFO L158 Benchmark]: Witness Printer took 39.43ms. Allocated memory is still 1.1GB. Free memory was 419.5MB in the beginning and 416.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:59:24,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 32.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.45ms. Allocated memory was 50.3MB in the beginning and 62.9MB in the end (delta: 12.6MB). Free memory was 25.3MB in the beginning and 39.4MB in the end (delta: -14.1MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.18ms. Allocated memory is still 62.9MB. Free memory was 39.4MB in the beginning and 38.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.05ms. Allocated memory is still 62.9MB. Free memory was 37.9MB in the beginning and 36.9MB in the end (delta: 942.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 286.13ms. Allocated memory is still 62.9MB. Free memory was 36.9MB in the beginning and 45.2MB in the end (delta: -8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 66634.50ms. Allocated memory was 62.9MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 44.7MB in the beginning and 419.5MB in the end (delta: -374.8MB). Peak memory consumption was 846.7MB. Max. memory is 16.1GB. * Witness Printer took 39.43ms. Allocated memory is still 1.1GB. Free memory was 419.5MB in the beginning and 416.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 32]: 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 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.6s, OverallIterations: 11, TraceHistogramMax: 864, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.2s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 56.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 368 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 358 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 214 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 229 IncrementalHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 144 mSDtfsCounter, 229 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4547 GetRequests, 4472 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2250occurred in iteration=10, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 158 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 1215 NumberOfFragments, 77 HoareAnnotationTreeSize, 5 FomulaSimplifications, 24924 FormulaSimplificationTreeSizeReduction, 33.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 31128 FormulaSimplificationTreeSizeReductionInter, 22.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 6783 NumberOfCodeBlocks, 5313 NumberOfCodeBlocksAsserted, 477 NumberOfCheckSat, 7882 ConstructedInterpolants, 0 QuantifiedInterpolants, 15641 SizeOfPredicates, 4 NumberOfNonLiveVariables, 3210 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 1456645/2146244 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((b < 6 && a < 6) && d < 7) && c < 6 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((!(d < 6) && !(c < 6)) && a < 6) && d < 7) && b < 7) && c < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((!(d < 6) && !(b < 6)) && !(c < 6)) && a < 7) && d < 7) && b < 7) && c < 7 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((!(d < 6) && b < 6) && a < 6) && d < 7) && c < 7 RESULT: Ultimate proved your program to be correct! [2022-07-21 02:59:24,661 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