./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bor4.i --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/array-crafted/bor4.i -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 530f2a23e46989c01d5f933930e2ae4d9f59000418a38b175b5a857a453825fc --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:23:49,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:23:49,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:23:49,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:23:49,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:23:49,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:23:49,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:23:49,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:23:49,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:23:49,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:23:49,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:23:49,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:23:49,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:23:49,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:23:49,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:23:49,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:23:49,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:23:49,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:23:49,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:23:49,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:23:49,889 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:23:49,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:23:49,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:23:49,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:23:49,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:23:49,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:23:49,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:23:49,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:23:49,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:23:49,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:23:49,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:23:49,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:23:49,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:23:49,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:23:49,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:23:49,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:23:49,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:23:49,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:23:49,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:23:49,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:23:49,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:23:49,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:23:49,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:23:49,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:23:49,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:23:49,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:23:49,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:23:49,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:23:49,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:23:49,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:23:49,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:23:49,942 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:23:49,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:23:49,943 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:23:49,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:23:49,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:23:49,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:23:49,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:23:49,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:23:49,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:23:49,944 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:23:49,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:23:49,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:23:49,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:23:49,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:23:49,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:23:49,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:23:49,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:23:49,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:23:49,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:23:49,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:23:49,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:23:49,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:23:49,948 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:23:49,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:23:49,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:23:49,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 530f2a23e46989c01d5f933930e2ae4d9f59000418a38b175b5a857a453825fc [2022-07-20 21:23:50,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:23:50,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:23:50,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:23:50,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:23:50,210 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:23:50,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor4.i [2022-07-20 21:23:50,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2fb68f1/027f7a14331c4057a8347d31ca0b0735/FLAGfbd5dfef8 [2022-07-20 21:23:50,613 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:23:50,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor4.i [2022-07-20 21:23:50,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2fb68f1/027f7a14331c4057a8347d31ca0b0735/FLAGfbd5dfef8 [2022-07-20 21:23:51,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2fb68f1/027f7a14331c4057a8347d31ca0b0735 [2022-07-20 21:23:51,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:23:51,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:23:51,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:23:51,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:23:51,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:23:51,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bc922d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51, skipping insertion in model container [2022-07-20 21:23:51,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:23:51,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:23:51,288 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/array-crafted/bor4.i[1303,1316] [2022-07-20 21:23:51,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:23:51,304 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:23:51,335 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/array-crafted/bor4.i[1303,1316] [2022-07-20 21:23:51,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:23:51,352 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:23:51,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51 WrapperNode [2022-07-20 21:23:51,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:23:51,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:23:51,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:23:51,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:23:51,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,396 INFO L137 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-07-20 21:23:51,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:23:51,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:23:51,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:23:51,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:23:51,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:23:51,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:23:51,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:23:51,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:23:51,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (1/1) ... [2022-07-20 21:23:51,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:23:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:51,466 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) [2022-07-20 21:23:51,487 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 [2022-07-20 21:23:51,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:23:51,507 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-07-20 21:23:51,507 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-07-20 21:23:51,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:23:51,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:23:51,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:23:51,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:23:51,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:23:51,586 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:23:51,588 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:23:51,749 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:23:51,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:23:51,755 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:23:51,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:23:51 BoogieIcfgContainer [2022-07-20 21:23:51,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:23:51,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:23:51,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:23:51,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:23:51,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:23:51" (1/3) ... [2022-07-20 21:23:51,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4314573b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:23:51, skipping insertion in model container [2022-07-20 21:23:51,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:23:51" (2/3) ... [2022-07-20 21:23:51,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4314573b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:23:51, skipping insertion in model container [2022-07-20 21:23:51,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:23:51" (3/3) ... [2022-07-20 21:23:51,764 INFO L111 eAbstractionObserver]: Analyzing ICFG bor4.i [2022-07-20 21:23:51,775 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:23:51,776 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:23:51,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:23:51,855 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@4b35125d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d55293c [2022-07-20 21:23:51,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:23:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:23:51,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:51,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:51,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -565416169, now seen corresponding path program 1 times [2022-07-20 21:23:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:51,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640890809] [2022-07-20 21:23:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:51,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:23:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:23:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:23:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:23:52,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:52,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640890809] [2022-07-20 21:23:52,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640890809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:23:52,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:23:52,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:23:52,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466777356] [2022-07-20 21:23:52,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:23:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:23:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:23:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:23:52,115 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:23:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:52,148 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-07-20 21:23:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:23:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-20 21:23:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:52,157 INFO L225 Difference]: With dead ends: 68 [2022-07-20 21:23:52,158 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 21:23:52,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:23:52,163 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:52,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 21:23:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2022-07-20 21:23:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-07-20 21:23:52,194 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 28 [2022-07-20 21:23:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:52,194 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-07-20 21:23:52,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:23:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-07-20 21:23:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:23:52,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:52,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:52,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:23:52,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1018640069, now seen corresponding path program 1 times [2022-07-20 21:23:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:52,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89191210] [2022-07-20 21:23:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:23:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:23:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:23:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:23:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89191210] [2022-07-20 21:23:52,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89191210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270074964] [2022-07-20 21:23:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:52,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:52,313 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) [2022-07-20 21:23:52,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:23:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:23:52,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:23:52,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:23:52,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270074964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:23:52,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:23:52,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-20 21:23:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453623944] [2022-07-20 21:23:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:23:52,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:23:52,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:23:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:23:52,441 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:23:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:52,450 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-07-20 21:23:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:23:52,450 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-20 21:23:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:52,451 INFO L225 Difference]: With dead ends: 52 [2022-07-20 21:23:52,453 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:23:52,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:23:52,455 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:52,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:23:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-20 21:23:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-07-20 21:23:52,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 28 [2022-07-20 21:23:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:52,462 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-07-20 21:23:52,462 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:23:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-07-20 21:23:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 21:23:52,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:52,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:52,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:52,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash -497824771, now seen corresponding path program 1 times [2022-07-20 21:23:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:52,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959607250] [2022-07-20 21:23:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:23:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 21:23:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:23:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:23:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959607250] [2022-07-20 21:23:52,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959607250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:52,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925476754] [2022-07-20 21:23:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:52,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:52,824 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) [2022-07-20 21:23:52,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:23:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:23:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:23:52,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:23:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925476754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:23:52,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:23:52,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-20 21:23:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33046848] [2022-07-20 21:23:52,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:23:52,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:23:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:23:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:23:52,921 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:23:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:52,929 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2022-07-20 21:23:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:23:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-20 21:23:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:52,931 INFO L225 Difference]: With dead ends: 57 [2022-07-20 21:23:52,931 INFO L226 Difference]: Without dead ends: 35 [2022-07-20 21:23:52,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:23:52,932 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:52,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-20 21:23:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-07-20 21:23:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-20 21:23:52,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 30 [2022-07-20 21:23:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:52,937 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-20 21:23:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:23:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-20 21:23:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:23:52,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:52,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:52,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:53,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 21:23:53,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1532793032, now seen corresponding path program 1 times [2022-07-20 21:23:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:53,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278099896] [2022-07-20 21:23:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:53,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:23:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:23:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-20 21:23:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:23:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278099896] [2022-07-20 21:23:53,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278099896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350226166] [2022-07-20 21:23:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:53,284 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) [2022-07-20 21:23:53,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:23:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:23:53,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:23:53,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:23:53,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350226166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:23:53,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:23:53,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-20 21:23:53,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778660218] [2022-07-20 21:23:53,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:23:53,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:23:53,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:53,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:23:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:23:53,414 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:23:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:53,426 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-07-20 21:23:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:23:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-20 21:23:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:53,428 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:23:53,428 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:23:53,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:23:53,440 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 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 [2022-07-20 21:23:53,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:23:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-20 21:23:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-20 21:23:53,445 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 42 [2022-07-20 21:23:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:53,445 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-20 21:23:53,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:23:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-20 21:23:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:23:53,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:53,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:53,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:53,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:53,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 164449686, now seen corresponding path program 1 times [2022-07-20 21:23:53,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715147280] [2022-07-20 21:23:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:53,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:23:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:23:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:23:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:23:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715147280] [2022-07-20 21:23:53,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715147280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352025408] [2022-07-20 21:23:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:53,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:53,754 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) [2022-07-20 21:23:53,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:23:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:53,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:23:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:23:53,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:23:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:23:53,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352025408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:23:53,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:23:53,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-20 21:23:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070528510] [2022-07-20 21:23:53,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:23:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 21:23:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 21:23:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:23:53,919 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:23:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:54,006 INFO L93 Difference]: Finished difference Result 93 states and 135 transitions. [2022-07-20 21:23:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:23:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-07-20 21:23:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:54,008 INFO L225 Difference]: With dead ends: 93 [2022-07-20 21:23:54,009 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 21:23:54,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:23:54,011 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:54,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 170 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 21:23:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-07-20 21:23:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-07-20 21:23:54,024 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 44 [2022-07-20 21:23:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:54,024 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-07-20 21:23:54,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:23:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-07-20 21:23:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 21:23:54,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:54,030 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:54,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:54,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:54,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -724622569, now seen corresponding path program 2 times [2022-07-20 21:23:54,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412192413] [2022-07-20 21:23:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 21:23:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 21:23:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-20 21:23:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 21:23:54,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:54,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412192413] [2022-07-20 21:23:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412192413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:54,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182796603] [2022-07-20 21:23:54,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:23:54,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:54,352 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) [2022-07-20 21:23:54,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:23:54,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:23:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:23:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:23:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-20 21:23:54,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:23:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-20 21:23:54,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182796603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:23:54,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:23:54,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-20 21:23:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586245586] [2022-07-20 21:23:54,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:23:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:23:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:23:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:23:54,540 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:23:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:54,600 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2022-07-20 21:23:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:23:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-20 21:23:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:54,603 INFO L225 Difference]: With dead ends: 103 [2022-07-20 21:23:54,603 INFO L226 Difference]: Without dead ends: 71 [2022-07-20 21:23:54,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:23:54,605 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:54,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 197 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-20 21:23:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-07-20 21:23:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-20 21:23:54,612 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 62 [2022-07-20 21:23:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:54,612 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-20 21:23:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:23:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-20 21:23:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 21:23:54,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:54,614 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:54,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:54,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1424970623, now seen corresponding path program 3 times [2022-07-20 21:23:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856682254] [2022-07-20 21:23:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:23:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-20 21:23:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:23:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 21:23:54,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856682254] [2022-07-20 21:23:54,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856682254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938412075] [2022-07-20 21:23:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:23:54,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:54,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:54,953 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) [2022-07-20 21:23:54,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:23:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:23:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:23:55,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:23:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 21:23:55,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:23:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 21:23:55,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938412075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:23:55,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:23:55,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-20 21:23:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201549684] [2022-07-20 21:23:55,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:23:55,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:23:55,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:23:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:23:55,087 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:23:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:55,149 INFO L93 Difference]: Finished difference Result 159 states and 231 transitions. [2022-07-20 21:23:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:23:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-20 21:23:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:55,151 INFO L225 Difference]: With dead ends: 159 [2022-07-20 21:23:55,152 INFO L226 Difference]: Without dead ends: 126 [2022-07-20 21:23:55,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:23:55,153 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 284 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:55,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 147 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-20 21:23:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2022-07-20 21:23:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2022-07-20 21:23:55,160 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 76 [2022-07-20 21:23:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:55,161 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2022-07-20 21:23:55,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:23:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2022-07-20 21:23:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 21:23:55,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:55,162 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:55,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:55,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1349373549, now seen corresponding path program 4 times [2022-07-20 21:23:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:55,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699805769] [2022-07-20 21:23:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:55,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:23:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:55,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-20 21:23:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:55,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-20 21:23:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:23:55,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:55,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699805769] [2022-07-20 21:23:55,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699805769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:55,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228225126] [2022-07-20 21:23:55,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:23:55,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:55,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:55,517 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:23:55,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:23:55,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:23:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:23:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:23:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:23:55,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:23:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:23:55,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228225126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:23:55,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:23:55,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-07-20 21:23:55,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772658880] [2022-07-20 21:23:55,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:23:55,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:23:55,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:23:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:23:55,812 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:23:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:55,868 INFO L93 Difference]: Finished difference Result 212 states and 302 transitions. [2022-07-20 21:23:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:23:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2022-07-20 21:23:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:55,869 INFO L225 Difference]: With dead ends: 212 [2022-07-20 21:23:55,869 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 21:23:55,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:23:55,871 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:55,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 244 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:23:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 21:23:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 109. [2022-07-20 21:23:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 104 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-07-20 21:23:55,877 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 124 [2022-07-20 21:23:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:55,877 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-07-20 21:23:55,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:23:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-07-20 21:23:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-20 21:23:55,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:55,878 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:55,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 21:23:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:56,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1124916869, now seen corresponding path program 5 times [2022-07-20 21:23:56,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:56,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741025431] [2022-07-20 21:23:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:56,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:23:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-20 21:23:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-20 21:23:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:23:56,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741025431] [2022-07-20 21:23:56,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741025431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376637305] [2022-07-20 21:23:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:23:56,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:56,407 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:23:56,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:23:58,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-20 21:23:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:23:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:23:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-07-20 21:23:58,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:23:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-07-20 21:23:58,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376637305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:23:58,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:23:58,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2022-07-20 21:23:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597026714] [2022-07-20 21:23:58,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:23:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:23:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:23:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:23:58,398 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:23:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:58,743 INFO L93 Difference]: Finished difference Result 327 states and 489 transitions. [2022-07-20 21:23:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 21:23:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 148 [2022-07-20 21:23:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:58,745 INFO L225 Difference]: With dead ends: 327 [2022-07-20 21:23:58,745 INFO L226 Difference]: Without dead ends: 265 [2022-07-20 21:23:58,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=659, Invalid=2203, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:23:58,747 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 773 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:58,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 327 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:23:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-20 21:23:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2022-07-20 21:23:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.3641975308641976) internal successors, (221), 162 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2022-07-20 21:23:58,755 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 148 [2022-07-20 21:23:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:58,755 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2022-07-20 21:23:58,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:23:58,755 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2022-07-20 21:23:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-20 21:23:58,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:58,757 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:58,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:23:58,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 21:23:58,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:58,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1940002591, now seen corresponding path program 6 times [2022-07-20 21:23:58,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:58,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841335959] [2022-07-20 21:23:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:58,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:59,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:23:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:59,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-20 21:23:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-20 21:23:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:23:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-07-20 21:23:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:23:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841335959] [2022-07-20 21:23:59,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841335959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:23:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271056945] [2022-07-20 21:23:59,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:23:59,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:23:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:23:59,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:23:59,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:23:59,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 21:23:59,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:23:59,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:23:59,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:23:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2022-07-20 21:23:59,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:23:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2022-07-20 21:23:59,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271056945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:23:59,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:23:59,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2022-07-20 21:23:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484745562] [2022-07-20 21:23:59,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:23:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:23:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:23:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:23:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:23:59,522 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:23:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:23:59,609 INFO L93 Difference]: Finished difference Result 393 states and 572 transitions. [2022-07-20 21:23:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 21:23:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-07-20 21:23:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:23:59,611 INFO L225 Difference]: With dead ends: 393 [2022-07-20 21:23:59,612 INFO L226 Difference]: Without dead ends: 275 [2022-07-20 21:23:59,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:23:59,613 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:23:59,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 226 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:23:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-20 21:23:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 177. [2022-07-20 21:23:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.3430232558139534) internal successors, (231), 172 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:23:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2022-07-20 21:23:59,620 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 246 [2022-07-20 21:23:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:23:59,620 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2022-07-20 21:23:59,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:23:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2022-07-20 21:23:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-07-20 21:23:59,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:23:59,623 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:23:59,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:23:59,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:23:59,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:23:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:23:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1867095591, now seen corresponding path program 7 times [2022-07-20 21:23:59,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:23:59,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19324058] [2022-07-20 21:23:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:23:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:23:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-20 21:24:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-20 21:24:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-20 21:24:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:00,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:24:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19324058] [2022-07-20 21:24:00,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19324058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:24:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013689688] [2022-07-20 21:24:00,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:24:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:24:00,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:24:00,203 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:24:00,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:24:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:24:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:24:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:00,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:24:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:01,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013689688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:24:01,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:24:01,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-07-20 21:24:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360591177] [2022-07-20 21:24:01,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:24:01,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-20 21:24:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:24:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-20 21:24:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:24:01,091 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:24:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:24:01,207 INFO L93 Difference]: Finished difference Result 452 states and 652 transitions. [2022-07-20 21:24:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:24:01,207 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-07-20 21:24:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:24:01,211 INFO L225 Difference]: With dead ends: 452 [2022-07-20 21:24:01,211 INFO L226 Difference]: Without dead ends: 326 [2022-07-20 21:24:01,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:24:01,213 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 64 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:24:01,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 151 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:24:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-20 21:24:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2022-07-20 21:24:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2633928571428572) internal successors, (283), 224 states have internal predecessors, (283), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:24:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2022-07-20 21:24:01,224 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 256 [2022-07-20 21:24:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:24:01,225 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2022-07-20 21:24:01,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:24:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2022-07-20 21:24:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-07-20 21:24:01,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:24:01,227 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:24:01,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:24:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:24:01,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:24:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:24:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash 316429581, now seen corresponding path program 8 times [2022-07-20 21:24:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:24:01,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974729474] [2022-07-20 21:24:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:24:01,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:24:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:02,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:24:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:02,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-07-20 21:24:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:02,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-07-20 21:24:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:24:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974729474] [2022-07-20 21:24:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974729474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:24:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031329374] [2022-07-20 21:24:02,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:24:02,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:24:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:24:02,503 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:24:02,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:24:02,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:24:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:24:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 21:24:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:24:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:02,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:24:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:05,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031329374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:24:05,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:24:05,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-07-20 21:24:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187472477] [2022-07-20 21:24:05,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:24:05,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-20 21:24:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:24:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-20 21:24:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-07-20 21:24:05,360 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:24:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:24:05,631 INFO L93 Difference]: Finished difference Result 556 states and 782 transitions. [2022-07-20 21:24:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-20 21:24:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 308 [2022-07-20 21:24:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:24:05,634 INFO L225 Difference]: With dead ends: 556 [2022-07-20 21:24:05,634 INFO L226 Difference]: Without dead ends: 430 [2022-07-20 21:24:05,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-07-20 21:24:05,637 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 116 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:24:05,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 213 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:24:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-07-20 21:24:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 333. [2022-07-20 21:24:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.1798780487804879) internal successors, (387), 328 states have internal predecessors, (387), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:24:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 393 transitions. [2022-07-20 21:24:05,652 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 393 transitions. Word has length 308 [2022-07-20 21:24:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:24:05,652 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 393 transitions. [2022-07-20 21:24:05,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:24:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 393 transitions. [2022-07-20 21:24:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-07-20 21:24:05,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:24:05,660 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:24:05,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:24:05,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:24:05,879 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:24:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:24:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash 727115125, now seen corresponding path program 9 times [2022-07-20 21:24:05,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:24:05,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749206111] [2022-07-20 21:24:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:24:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:24:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:08,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-20 21:24:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-07-20 21:24:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2022-07-20 21:24:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:24:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:24:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749206111] [2022-07-20 21:24:08,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749206111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:24:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107597420] [2022-07-20 21:24:08,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:24:08,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:24:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:24:08,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:24:08,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:24:08,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:24:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:24:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:24:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:24:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2022-07-20 21:24:08,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:24:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2022-07-20 21:24:09,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107597420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:24:09,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:24:09,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 9, 9] total 120 [2022-07-20 21:24:09,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049089236] [2022-07-20 21:24:09,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:24:09,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-07-20 21:24:09,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:24:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-07-20 21:24:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2022-07-20 21:24:09,167 INFO L87 Difference]: Start difference. First operand 333 states and 393 transitions. Second operand has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:24:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:24:09,426 INFO L93 Difference]: Finished difference Result 575 states and 758 transitions. [2022-07-20 21:24:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-07-20 21:24:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 412 [2022-07-20 21:24:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:24:09,428 INFO L225 Difference]: With dead ends: 575 [2022-07-20 21:24:09,428 INFO L226 Difference]: Without dead ends: 449 [2022-07-20 21:24:09,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 815 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2022-07-20 21:24:09,431 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 138 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:24:09,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 255 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:24:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-20 21:24:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 351. [2022-07-20 21:24:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.170520231213873) internal successors, (405), 346 states have internal predecessors, (405), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:24:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 411 transitions. [2022-07-20 21:24:09,439 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 411 transitions. Word has length 412 [2022-07-20 21:24:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:24:09,440 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 411 transitions. [2022-07-20 21:24:09,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:24:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 411 transitions. [2022-07-20 21:24:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-07-20 21:24:09,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:24:09,444 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:24:09,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:24:09,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:24:09,662 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:24:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:24:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1691242201, now seen corresponding path program 10 times [2022-07-20 21:24:09,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:24:09,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207017141] [2022-07-20 21:24:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:24:09,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:24:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-20 21:24:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:13,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2022-07-20 21:24:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 365 [2022-07-20 21:24:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-20 21:24:13,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:24:13,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207017141] [2022-07-20 21:24:13,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207017141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:24:13,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145346943] [2022-07-20 21:24:13,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:24:13,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:24:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:24:13,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:24:13,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:24:13,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:24:13,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:24:13,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-20 21:24:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:24:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-20 21:24:13,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:24:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-20 21:24:22,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145346943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:24:22,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:24:22,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-07-20 21:24:22,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196191092] [2022-07-20 21:24:22,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:24:22,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-07-20 21:24:22,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:24:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-07-20 21:24:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-07-20 21:24:22,141 INFO L87 Difference]: Start difference. First operand 351 states and 411 transitions. Second operand has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:24:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:24:22,798 INFO L93 Difference]: Finished difference Result 800 states and 1079 transitions. [2022-07-20 21:24:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-07-20 21:24:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 430 [2022-07-20 21:24:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:24:22,801 INFO L225 Difference]: With dead ends: 800 [2022-07-20 21:24:22,801 INFO L226 Difference]: Without dead ends: 658 [2022-07-20 21:24:22,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 760 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-07-20 21:24:22,805 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:24:22,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 306 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:24:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-07-20 21:24:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 561. [2022-07-20 21:24:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.106115107913669) internal successors, (615), 556 states have internal predecessors, (615), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:24:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 621 transitions. [2022-07-20 21:24:22,844 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 621 transitions. Word has length 430 [2022-07-20 21:24:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:24:22,844 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 621 transitions. [2022-07-20 21:24:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:24:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 621 transitions. [2022-07-20 21:24:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-20 21:24:22,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:24:22,848 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:24:22,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:24:23,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:24:23,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:24:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:24:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1870976967, now seen corresponding path program 11 times [2022-07-20 21:24:23,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:24:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219137166] [2022-07-20 21:24:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:24:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:24:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 419 [2022-07-20 21:24:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:33,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2022-07-20 21:24:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:33,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 575 [2022-07-20 21:24:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:24:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-20 21:24:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:24:33,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219137166] [2022-07-20 21:24:33,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219137166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:24:33,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839820574] [2022-07-20 21:24:33,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:24:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:24:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:24:33,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:24:33,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process