./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/skipped.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-tiling/skipped.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:52:32,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:52:32,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:52:32,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:52:32,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:52:32,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:52:32,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:52:32,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:52:32,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:52:32,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:52:32,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:52:32,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:52:32,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:52:32,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:52:32,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:52:32,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:52:32,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:52:32,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:52:32,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:52:32,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:52:32,950 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:52:32,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:52:32,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:52:32,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:52:32,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:52:32,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:52:32,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:52:32,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:52:32,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:52:32,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:52:32,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:52:32,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:52:32,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:52:32,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:52:32,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:52:32,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:52:32,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:52:32,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:52:32,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:52:32,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:52:32,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:52:32,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:52:32,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:52:33,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:52:33,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:52:33,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:52:33,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:52:33,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:52:33,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:52:33,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:52:33,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:52:33,011 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:52:33,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:52:33,012 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:52:33,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:52:33,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:52:33,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:52:33,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:52:33,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:52:33,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:52:33,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:52:33,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:52:33,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:52:33,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:52:33,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:52:33,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:52:33,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:52:33,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:52:33,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:52:33,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:52:33,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:52:33,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:52:33,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:52:33,022 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:52:33,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:52:33,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:52:33,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c36d485530e5f36dabf3b382821b7ad25023b1cbf4cb81b13349652fc8273f7 [2022-07-22 09:52:33,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:52:33,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:52:33,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:52:33,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:52:33,298 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:52:33,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skipped.c [2022-07-22 09:52:33,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28d2c464/c84a2f7bdfdd46b086ae98dac816ac7c/FLAG211a4bd83 [2022-07-22 09:52:33,711 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:52:33,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skipped.c [2022-07-22 09:52:33,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28d2c464/c84a2f7bdfdd46b086ae98dac816ac7c/FLAG211a4bd83 [2022-07-22 09:52:34,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28d2c464/c84a2f7bdfdd46b086ae98dac816ac7c [2022-07-22 09:52:34,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:52:34,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:52:34,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:52:34,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:52:34,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:52:34,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd480b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34, skipping insertion in model container [2022-07-22 09:52:34,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:52:34,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:52:34,289 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-tiling/skipped.c[398,411] [2022-07-22 09:52:34,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:52:34,312 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:52:34,323 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-tiling/skipped.c[398,411] [2022-07-22 09:52:34,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:52:34,356 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:52:34,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34 WrapperNode [2022-07-22 09:52:34,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:52:34,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:52:34,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:52:34,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:52:34,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,402 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-22 09:52:34,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:52:34,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:52:34,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:52:34,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:52:34,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:52:34,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:52:34,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:52:34,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:52:34,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (1/1) ... [2022-07-22 09:52:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:52:34,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:34,463 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) [2022-07-22 09:52:34,475 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 [2022-07-22 09:52:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:52:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:52:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:52:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:52:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:52:34,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:52:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:52:34,563 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:52:34,565 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:52:34,741 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:52:34,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:52:34,757 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:52:34,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:52:34 BoogieIcfgContainer [2022-07-22 09:52:34,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:52:34,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:52:34,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:52:34,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:52:34,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:52:34" (1/3) ... [2022-07-22 09:52:34,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149023bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:52:34, skipping insertion in model container [2022-07-22 09:52:34,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:52:34" (2/3) ... [2022-07-22 09:52:34,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149023bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:52:34, skipping insertion in model container [2022-07-22 09:52:34,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:52:34" (3/3) ... [2022-07-22 09:52:34,773 INFO L111 eAbstractionObserver]: Analyzing ICFG skipped.c [2022-07-22 09:52:34,821 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:52:34,821 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:52:34,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:52:34,868 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@394b35a0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e419940 [2022-07-22 09:52:34,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:52:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 09:52:34,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:34,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:34,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:34,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2022-07-22 09:52:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:34,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966376086] [2022-07-22 09:52:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:35,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966376086] [2022-07-22 09:52:35,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966376086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:52:35,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:52:35,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:52:35,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583033692] [2022-07-22 09:52:35,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:52:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:52:35,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:35,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:52:35,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:52:35,114 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:35,130 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2022-07-22 09:52:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:52:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 09:52:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:35,140 INFO L225 Difference]: With dead ends: 43 [2022-07-22 09:52:35,140 INFO L226 Difference]: Without dead ends: 20 [2022-07-22 09:52:35,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:52:35,150 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-22 09:52:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-22 09:52:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-22 09:52:35,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2022-07-22 09:52:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:35,177 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-22 09:52:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-22 09:52:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 09:52:35,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:35,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:35,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:52:35,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2022-07-22 09:52:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078926393] [2022-07-22 09:52:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:35,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:35,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078926393] [2022-07-22 09:52:35,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078926393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:52:35,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:52:35,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:52:35,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366492997] [2022-07-22 09:52:35,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:52:35,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:52:35,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:52:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:52:35,282 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:35,327 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-07-22 09:52:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:52:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 09:52:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:35,329 INFO L225 Difference]: With dead ends: 37 [2022-07-22 09:52:35,329 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 09:52:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:52:35,331 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:35,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 09:52:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-07-22 09:52:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-22 09:52:35,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-07-22 09:52:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:35,335 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-22 09:52:35,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-22 09:52:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 09:52:35,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:35,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:52:35,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2022-07-22 09:52:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:35,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511206290] [2022-07-22 09:52:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:35,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511206290] [2022-07-22 09:52:35,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511206290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64572275] [2022-07-22 09:52:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:35,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:35,403 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) [2022-07-22 09:52:35,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:52:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:35,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:52:35,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:35,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:35,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64572275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:35,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:35,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:52:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051379978] [2022-07-22 09:52:35,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:52:35,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:52:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:52:35,639 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:35,707 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-22 09:52:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:52:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-22 09:52:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:35,709 INFO L225 Difference]: With dead ends: 39 [2022-07-22 09:52:35,709 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 09:52:35,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:52:35,713 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:35,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 09:52:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-22 09:52:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-22 09:52:35,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2022-07-22 09:52:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:35,725 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-22 09:52:35,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-22 09:52:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 09:52:35,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:35,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:35,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:35,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2022-07-22 09:52:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848608421] [2022-07-22 09:52:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:36,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:36,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848608421] [2022-07-22 09:52:36,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848608421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:52:36,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:52:36,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 09:52:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385755328] [2022-07-22 09:52:36,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:52:36,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 09:52:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 09:52:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:52:36,081 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:36,121 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-07-22 09:52:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:52:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 09:52:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:36,122 INFO L225 Difference]: With dead ends: 35 [2022-07-22 09:52:36,133 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 09:52:36,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:52:36,135 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:36,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 09:52:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-22 09:52:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-22 09:52:36,140 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-07-22 09:52:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:36,140 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-22 09:52:36,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-22 09:52:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 09:52:36,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:36,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 09:52:36,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:36,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2022-07-22 09:52:36,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:36,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122508474] [2022-07-22 09:52:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:36,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:36,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122508474] [2022-07-22 09:52:36,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122508474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:36,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80332208] [2022-07-22 09:52:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:36,378 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) [2022-07-22 09:52:36,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:52:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:36,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:52:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:36,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:52:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:52:36,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:52:36,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 09:52:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:36,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-22 09:52:36,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-22 09:52:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:36,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80332208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:36,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:36,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-22 09:52:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843409015] [2022-07-22 09:52:36,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:36,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:52:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:52:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:52:36,757 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:36,944 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-22 09:52:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:52:36,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 09:52:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:36,946 INFO L225 Difference]: With dead ends: 58 [2022-07-22 09:52:36,946 INFO L226 Difference]: Without dead ends: 56 [2022-07-22 09:52:36,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:52:36,947 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:36,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 90 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-22 09:52:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-07-22 09:52:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-22 09:52:36,968 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2022-07-22 09:52:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:36,968 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-22 09:52:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-22 09:52:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 09:52:36,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:36,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:36,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:37,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:37,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2022-07-22 09:52:37,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:37,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824472598] [2022-07-22 09:52:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:37,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:37,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824472598] [2022-07-22 09:52:37,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824472598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:37,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752773639] [2022-07-22 09:52:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:37,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:37,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:37,325 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) [2022-07-22 09:52:37,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:52:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 09:52:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:52:37,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:52:37,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 09:52:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:37,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:37,563 INFO L356 Elim1Store]: treesize reduction 8, result has 38.5 percent of original size [2022-07-22 09:52:37,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-07-22 09:52:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:37,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752773639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:37,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:37,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2022-07-22 09:52:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176750051] [2022-07-22 09:52:37,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:37,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 09:52:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 09:52:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-22 09:52:37,574 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:37,711 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-22 09:52:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:52:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 09:52:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:37,712 INFO L225 Difference]: With dead ends: 53 [2022-07-22 09:52:37,712 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 09:52:37,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:52:37,713 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:37,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 57 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 09:52:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2022-07-22 09:52:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-22 09:52:37,718 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2022-07-22 09:52:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:37,718 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-22 09:52:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-22 09:52:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 09:52:37,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:37,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:37,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:37,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:37,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1653781302, now seen corresponding path program 1 times [2022-07-22 09:52:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985224390] [2022-07-22 09:52:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:37,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:38,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985224390] [2022-07-22 09:52:38,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985224390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569737716] [2022-07-22 09:52:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:38,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:38,060 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) [2022-07-22 09:52:38,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:52:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 09:52:38,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:38,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:52:38,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:38,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:38,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:52:38,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:52:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:38,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569737716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:38,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:38,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2022-07-22 09:52:38,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116166976] [2022-07-22 09:52:38,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:38,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 09:52:38,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 09:52:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 09:52:38,296 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:38,475 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-07-22 09:52:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 09:52:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 09:52:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:38,477 INFO L225 Difference]: With dead ends: 63 [2022-07-22 09:52:38,477 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 09:52:38,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:52:38,478 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:38,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 96 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 09:52:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-07-22 09:52:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-22 09:52:38,484 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 25 [2022-07-22 09:52:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:38,484 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-22 09:52:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-07-22 09:52:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 09:52:38,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:38,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:38,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 09:52:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:38,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash -952716724, now seen corresponding path program 1 times [2022-07-22 09:52:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:38,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163133284] [2022-07-22 09:52:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:38,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:38,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163133284] [2022-07-22 09:52:38,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163133284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:38,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075021892] [2022-07-22 09:52:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:38,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:38,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:38,844 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) [2022-07-22 09:52:38,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:52:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:38,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 09:52:38,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:38,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:52:38,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:39,054 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:52:39,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:52:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:39,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075021892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:39,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:39,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 14 [2022-07-22 09:52:39,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441569270] [2022-07-22 09:52:39,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:52:39,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:39,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:52:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:52:39,069 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:39,234 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-07-22 09:52:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:52:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 09:52:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:39,235 INFO L225 Difference]: With dead ends: 53 [2022-07-22 09:52:39,235 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 09:52:39,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:52:39,236 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:39,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 09:52:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-22 09:52:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-22 09:52:39,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2022-07-22 09:52:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:39,242 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-22 09:52:39,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-22 09:52:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 09:52:39,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:39,243 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:39,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:39,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:39,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1643646272, now seen corresponding path program 2 times [2022-07-22 09:52:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220342278] [2022-07-22 09:52:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:52:39,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220342278] [2022-07-22 09:52:39,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220342278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486279298] [2022-07-22 09:52:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:52:39,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:39,536 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) [2022-07-22 09:52:39,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:52:39,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:52:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:52:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:52:39,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:52:39,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486279298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:39,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:39,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 09:52:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536153856] [2022-07-22 09:52:39,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:52:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:52:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:52:39,716 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:39,853 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-07-22 09:52:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:52:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-22 09:52:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:39,854 INFO L225 Difference]: With dead ends: 88 [2022-07-22 09:52:39,854 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 09:52:39,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:52:39,857 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:39,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 09:52:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2022-07-22 09:52:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-22 09:52:39,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-07-22 09:52:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:39,867 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-22 09:52:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-22 09:52:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 09:52:39,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:39,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:39,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:40,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:40,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1334470626, now seen corresponding path program 3 times [2022-07-22 09:52:40,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:40,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056843449] [2022-07-22 09:52:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:40,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:52:40,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056843449] [2022-07-22 09:52:40,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056843449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143053443] [2022-07-22 09:52:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:52:40,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:40,260 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) [2022-07-22 09:52:40,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:52:40,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:52:40,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 09:52:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:52:40,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:52:40,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143053443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:40,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:40,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2022-07-22 09:52:40,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817000725] [2022-07-22 09:52:40,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:40,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 09:52:40,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 09:52:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:52:40,629 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:40,977 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-22 09:52:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:52:40,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 09:52:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:40,978 INFO L225 Difference]: With dead ends: 62 [2022-07-22 09:52:40,978 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 09:52:40,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:52:40,979 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 219 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:40,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 70 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:52:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 09:52:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2022-07-22 09:52:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-22 09:52:40,986 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 31 [2022-07-22 09:52:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:40,986 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-22 09:52:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-22 09:52:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 09:52:40,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:40,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:41,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:41,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:41,203 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1713959812, now seen corresponding path program 4 times [2022-07-22 09:52:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260297466] [2022-07-22 09:52:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:41,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:52:41,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260297466] [2022-07-22 09:52:41,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260297466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311935833] [2022-07-22 09:52:41,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:52:41,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:41,423 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) [2022-07-22 09:52:41,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:52:41,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:52:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 09:52:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:52:41,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 09:52:41,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311935833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:41,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:41,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-07-22 09:52:41,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024379798] [2022-07-22 09:52:41,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:41,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:52:41,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:52:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:52:41,782 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:42,041 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-07-22 09:52:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:52:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-22 09:52:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:42,042 INFO L225 Difference]: With dead ends: 76 [2022-07-22 09:52:42,042 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 09:52:42,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:52:42,043 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:42,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 84 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:52:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 09:52:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2022-07-22 09:52:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-22 09:52:42,048 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2022-07-22 09:52:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:42,048 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-22 09:52:42,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-22 09:52:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 09:52:42,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:42,049 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:42,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:42,259 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,SelfDestructingSolverStorable10 [2022-07-22 09:52:42,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1453047458, now seen corresponding path program 5 times [2022-07-22 09:52:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838928857] [2022-07-22 09:52:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:42,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838928857] [2022-07-22 09:52:42,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838928857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:42,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103283731] [2022-07-22 09:52:42,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:52:42,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:42,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:42,952 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) [2022-07-22 09:52:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:52:43,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-22 09:52:43,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 09:52:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:43,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:52:43,126 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:52:43,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:52:43,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:52:43,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:43,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:52:43,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:52:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:52:43,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103283731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:43,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:43,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 29 [2022-07-22 09:52:43,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427565851] [2022-07-22 09:52:43,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:43,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:52:43,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:52:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:52:43,445 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:46,380 INFO L93 Difference]: Finished difference Result 265 states and 309 transitions. [2022-07-22 09:52:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-22 09:52:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-22 09:52:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:46,381 INFO L225 Difference]: With dead ends: 265 [2022-07-22 09:52:46,382 INFO L226 Difference]: Without dead ends: 263 [2022-07-22 09:52:46,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1423, Invalid=9083, Unknown=0, NotChecked=0, Total=10506 [2022-07-22 09:52:46,386 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 611 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:46,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 230 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:52:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-22 09:52:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 68. [2022-07-22 09:52:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-07-22 09:52:46,396 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 38 [2022-07-22 09:52:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:46,397 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-07-22 09:52:46,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-07-22 09:52:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 09:52:46,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:46,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:46,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:46,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -135300444, now seen corresponding path program 1 times [2022-07-22 09:52:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:46,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333435799] [2022-07-22 09:52:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:47,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:47,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333435799] [2022-07-22 09:52:47,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333435799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:47,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407263213] [2022-07-22 09:52:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:47,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:47,168 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) [2022-07-22 09:52:47,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:52:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 09:52:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:47,367 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:52:47,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:52:47,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:52:47,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:47,696 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:52:47,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:52:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:52:47,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407263213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:47,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:47,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 10] total 32 [2022-07-22 09:52:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033441336] [2022-07-22 09:52:47,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 09:52:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 09:52:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:52:47,720 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:49,869 INFO L93 Difference]: Finished difference Result 233 states and 281 transitions. [2022-07-22 09:52:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 09:52:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-22 09:52:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:49,871 INFO L225 Difference]: With dead ends: 233 [2022-07-22 09:52:49,871 INFO L226 Difference]: Without dead ends: 211 [2022-07-22 09:52:49,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=985, Invalid=5495, Unknown=0, NotChecked=0, Total=6480 [2022-07-22 09:52:49,873 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 382 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:49,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 203 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:52:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-22 09:52:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 60. [2022-07-22 09:52:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-22 09:52:49,883 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 38 [2022-07-22 09:52:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:49,883 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-22 09:52:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-22 09:52:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 09:52:49,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:49,884 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:49,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:50,095 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,SelfDestructingSolverStorable12 [2022-07-22 09:52:50,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 409588504, now seen corresponding path program 6 times [2022-07-22 09:52:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141418353] [2022-07-22 09:52:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:50,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141418353] [2022-07-22 09:52:50,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141418353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:50,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957614546] [2022-07-22 09:52:50,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:52:50,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:50,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:50,752 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) [2022-07-22 09:52:50,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:52:50,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 09:52:50,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:50,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 09:52:50,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:50,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:52:51,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:52:51,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:51,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:52:51,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:52:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:52:51,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957614546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:51,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:51,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2022-07-22 09:52:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631872198] [2022-07-22 09:52:51,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 09:52:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 09:52:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:52:51,184 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:52,769 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2022-07-22 09:52:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 09:52:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-22 09:52:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:52,773 INFO L225 Difference]: With dead ends: 207 [2022-07-22 09:52:52,773 INFO L226 Difference]: Without dead ends: 185 [2022-07-22 09:52:52,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=686, Invalid=5166, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 09:52:52,775 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 297 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:52,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 256 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:52:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-22 09:52:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 74. [2022-07-22 09:52:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-07-22 09:52:52,790 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 42 [2022-07-22 09:52:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:52,791 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-07-22 09:52:52,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-07-22 09:52:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 09:52:52,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:52,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:52,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:52,999 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,SelfDestructingSolverStorable13 [2022-07-22 09:52:52,999 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1279355238, now seen corresponding path program 1 times [2022-07-22 09:52:53,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:53,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162810552] [2022-07-22 09:52:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:53,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162810552] [2022-07-22 09:52:53,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162810552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44938546] [2022-07-22 09:52:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:53,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:53,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:53,758 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) [2022-07-22 09:52:53,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:52:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:53,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:52:53,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:54,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:52:54,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:54,202 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:52:54,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:52:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:52:54,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44938546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:54,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:54,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 11] total 35 [2022-07-22 09:52:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827869549] [2022-07-22 09:52:54,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:54,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 09:52:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 09:52:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:52:54,229 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:55,730 INFO L93 Difference]: Finished difference Result 203 states and 248 transitions. [2022-07-22 09:52:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 09:52:55,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-22 09:52:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:55,731 INFO L225 Difference]: With dead ends: 203 [2022-07-22 09:52:55,731 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 09:52:55,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=624, Invalid=4632, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 09:52:55,733 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:55,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 258 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:52:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 09:52:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 63. [2022-07-22 09:52:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-22 09:52:55,746 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2022-07-22 09:52:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:55,746 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-22 09:52:55,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-22 09:52:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 09:52:55,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:55,747 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:55,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:55,962 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,SelfDestructingSolverStorable14 [2022-07-22 09:52:55,962 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1670167694, now seen corresponding path program 7 times [2022-07-22 09:52:55,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:55,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161911607] [2022-07-22 09:52:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:52:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161911607] [2022-07-22 09:52:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161911607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104321194] [2022-07-22 09:52:56,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:52:56,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:56,048 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) [2022-07-22 09:52:56,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:52:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:56,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:52:56,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:52:56,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:52:56,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104321194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:56,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:56,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 09:52:56,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849424415] [2022-07-22 09:52:56,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:52:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:52:56,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:52:56,271 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:56,459 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2022-07-22 09:52:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 09:52:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-22 09:52:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:56,460 INFO L225 Difference]: With dead ends: 112 [2022-07-22 09:52:56,460 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 09:52:56,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:52:56,461 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 197 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:56,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 78 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 09:52:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2022-07-22 09:52:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-22 09:52:56,482 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 46 [2022-07-22 09:52:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:56,482 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-22 09:52:56,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-22 09:52:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:52:56,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:56,484 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:56,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:56,700 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,SelfDestructingSolverStorable15 [2022-07-22 09:52:56,700 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:56,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1173702100, now seen corresponding path program 8 times [2022-07-22 09:52:56,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:56,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827074776] [2022-07-22 09:52:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:56,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:52:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827074776] [2022-07-22 09:52:56,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827074776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830512010] [2022-07-22 09:52:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:52:56,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:56,893 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) [2022-07-22 09:52:56,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:52:56,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:52:56,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:52:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 09:52:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 09:52:57,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830512010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:57,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:57,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2022-07-22 09:52:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141802437] [2022-07-22 09:52:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:57,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:52:57,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:52:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:52:57,412 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:57,930 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-22 09:52:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 09:52:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-22 09:52:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:57,931 INFO L225 Difference]: With dead ends: 81 [2022-07-22 09:52:57,931 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 09:52:57,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 09:52:57,933 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:57,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 102 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:52:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 09:52:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-22 09:52:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-22 09:52:57,941 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2022-07-22 09:52:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:57,941 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-22 09:52:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-22 09:52:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 09:52:57,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:57,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:57,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:58,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:58,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -49846830, now seen corresponding path program 9 times [2022-07-22 09:52:58,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:58,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751988066] [2022-07-22 09:52:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:58,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:52:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751988066] [2022-07-22 09:52:58,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751988066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627486247] [2022-07-22 09:52:58,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:52:58,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:58,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:58,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:52:58,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:52:58,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 09:52:58,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:52:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:58,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:52:58,620 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:52:58,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:52:58,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 09:52:58,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:58,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:52:58,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:52:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 09:52:58,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627486247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:58,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:58,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-07-22 09:52:58,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316520303] [2022-07-22 09:52:58,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:58,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:52:58,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:52:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:52:58,946 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:00,539 INFO L93 Difference]: Finished difference Result 312 states and 393 transitions. [2022-07-22 09:53:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 09:53:00,540 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-22 09:53:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:00,540 INFO L225 Difference]: With dead ends: 312 [2022-07-22 09:53:00,541 INFO L226 Difference]: Without dead ends: 265 [2022-07-22 09:53:00,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=719, Invalid=5287, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 09:53:00,543 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 508 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:00,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 294 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:53:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-22 09:53:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 67. [2022-07-22 09:53:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-07-22 09:53:00,555 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 53 [2022-07-22 09:53:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:00,555 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-07-22 09:53:00,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-07-22 09:53:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 09:53:00,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:00,556 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:00,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 09:53:00,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 09:53:00,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2124223606, now seen corresponding path program 2 times [2022-07-22 09:53:00,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:00,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444688466] [2022-07-22 09:53:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:00,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444688466] [2022-07-22 09:53:01,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444688466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134459234] [2022-07-22 09:53:01,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:01,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:01,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:01,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:53:01,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:01,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:53:01,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:01,779 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:53:01,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:53:01,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:53:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:53:01,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:02,031 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:53:02,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:53:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 09:53:02,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134459234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:02,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:02,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 13] total 35 [2022-07-22 09:53:02,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710634191] [2022-07-22 09:53:02,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:02,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 09:53:02,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 09:53:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:53:02,069 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:04,028 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2022-07-22 09:53:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 09:53:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 09:53:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:04,029 INFO L225 Difference]: With dead ends: 242 [2022-07-22 09:53:04,029 INFO L226 Difference]: Without dead ends: 240 [2022-07-22 09:53:04,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=715, Invalid=5291, Unknown=0, NotChecked=0, Total=6006 [2022-07-22 09:53:04,031 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 487 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:04,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 221 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:53:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-22 09:53:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 60. [2022-07-22 09:53:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-07-22 09:53:04,050 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 55 [2022-07-22 09:53:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:04,050 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-07-22 09:53:04,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-07-22 09:53:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:53:04,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:04,050 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:04,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:04,251 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1094429206, now seen corresponding path program 10 times [2022-07-22 09:53:04,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:04,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021100131] [2022-07-22 09:53:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021100131] [2022-07-22 09:53:04,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021100131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024120322] [2022-07-22 09:53:04,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:53:04,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:04,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:04,852 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:04,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 09:53:04,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:53:04,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:04,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:53:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:04,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:53:05,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:53:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 09:53:05,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:05,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:53:05,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:53:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 09:53:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024120322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:05,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:05,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 34 [2022-07-22 09:53:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668118857] [2022-07-22 09:53:05,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:05,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 09:53:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 09:53:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 09:53:05,293 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:11,788 INFO L93 Difference]: Finished difference Result 487 states and 643 transitions. [2022-07-22 09:53:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-07-22 09:53:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 09:53:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:11,790 INFO L225 Difference]: With dead ends: 487 [2022-07-22 09:53:11,790 INFO L226 Difference]: Without dead ends: 485 [2022-07-22 09:53:11,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13657 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3339, Invalid=31817, Unknown=0, NotChecked=0, Total=35156 [2022-07-22 09:53:11,796 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1936 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 1573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1573 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:11,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1936 Valid, 309 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1573 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 09:53:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-22 09:53:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 73. [2022-07-22 09:53:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-07-22 09:53:11,820 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 59 [2022-07-22 09:53:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:11,821 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-07-22 09:53:11,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-07-22 09:53:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 09:53:11,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:11,822 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:11,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:12,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:12,028 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 828798828, now seen corresponding path program 2 times [2022-07-22 09:53:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729032921] [2022-07-22 09:53:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:12,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:12,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729032921] [2022-07-22 09:53:12,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729032921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095669298] [2022-07-22 09:53:12,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:12,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:12,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:12,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 09:53:12,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:12,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:53:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:12,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:53:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:13,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:13,133 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:53:13,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:53:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 09:53:13,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095669298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:13,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:13,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 14] total 39 [2022-07-22 09:53:13,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338359631] [2022-07-22 09:53:13,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:13,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:53:13,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:53:13,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:53:13,168 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:16,642 INFO L93 Difference]: Finished difference Result 477 states and 633 transitions. [2022-07-22 09:53:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-22 09:53:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 09:53:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:16,644 INFO L225 Difference]: With dead ends: 477 [2022-07-22 09:53:16,644 INFO L226 Difference]: Without dead ends: 475 [2022-07-22 09:53:16,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4282 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1576, Invalid=12230, Unknown=0, NotChecked=0, Total=13806 [2022-07-22 09:53:16,646 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1240 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:16,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 247 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 09:53:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-22 09:53:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 64. [2022-07-22 09:53:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-07-22 09:53:16,667 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 59 [2022-07-22 09:53:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:16,667 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-07-22 09:53:16,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-07-22 09:53:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:53:16,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:16,668 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:16,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 09:53:16,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:16,871 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2140830112, now seen corresponding path program 11 times [2022-07-22 09:53:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470087434] [2022-07-22 09:53:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:53:16,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:16,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470087434] [2022-07-22 09:53:16,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470087434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:16,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524178732] [2022-07-22 09:53:16,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:53:16,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:16,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:16,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:17,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 09:53:17,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 09:53:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 09:53:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:53:17,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:53:17,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524178732] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:17,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:17,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 09:53:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152513569] [2022-07-22 09:53:17,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:53:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:53:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-22 09:53:17,397 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:17,651 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2022-07-22 09:53:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:53:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 09:53:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:17,652 INFO L225 Difference]: With dead ends: 176 [2022-07-22 09:53:17,652 INFO L226 Difference]: Without dead ends: 97 [2022-07-22 09:53:17,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 09:53:17,653 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:17,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 103 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:53:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-22 09:53:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2022-07-22 09:53:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-07-22 09:53:17,669 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2022-07-22 09:53:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:17,669 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-07-22 09:53:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-07-22 09:53:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 09:53:17,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:17,670 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:17,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:17,875 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash -771049342, now seen corresponding path program 12 times [2022-07-22 09:53:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:17,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064165770] [2022-07-22 09:53:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:53:18,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064165770] [2022-07-22 09:53:18,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064165770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198471364] [2022-07-22 09:53:18,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:53:18,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:18,133 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 09:53:18,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 09:53:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:53:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:53:18,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:53:19,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198471364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:19,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:19,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-07-22 09:53:19,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273912267] [2022-07-22 09:53:19,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:19,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 09:53:19,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 09:53:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 09:53:19,189 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:19,690 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2022-07-22 09:53:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:53:19,691 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 09:53:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:19,691 INFO L225 Difference]: With dead ends: 112 [2022-07-22 09:53:19,691 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 09:53:19,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 09:53:19,692 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 314 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:19,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 121 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:53:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 09:53:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2022-07-22 09:53:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-07-22 09:53:19,717 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 65 [2022-07-22 09:53:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:19,718 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-07-22 09:53:19,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-07-22 09:53:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 09:53:19,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:19,719 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:19,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:19,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 09:53:19,935 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1827931244, now seen corresponding path program 13 times [2022-07-22 09:53:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426481180] [2022-07-22 09:53:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:19,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:53:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426481180] [2022-07-22 09:53:20,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426481180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264321668] [2022-07-22 09:53:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:53:20,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:20,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:20,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 09:53:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:20,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:53:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:53:20,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 09:53:21,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264321668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:21,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:21,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2022-07-22 09:53:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855086800] [2022-07-22 09:53:21,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:21,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 09:53:21,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 09:53:21,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 09:53:21,021 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:21,410 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2022-07-22 09:53:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 09:53:21,410 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-22 09:53:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:21,411 INFO L225 Difference]: With dead ends: 136 [2022-07-22 09:53:21,411 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 09:53:21,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=1882, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:53:21,412 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:21,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 96 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:53:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 09:53:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-07-22 09:53:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-22 09:53:21,437 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 70 [2022-07-22 09:53:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:21,437 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-22 09:53:21,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-22 09:53:21,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 09:53:21,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:21,438 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:21,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:21,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 09:53:21,662 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash -730693838, now seen corresponding path program 14 times [2022-07-22 09:53:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:21,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089432162] [2022-07-22 09:53:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:21,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:22,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089432162] [2022-07-22 09:53:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089432162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489851867] [2022-07-22 09:53:22,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:22,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:22,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:22,402 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:22,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 09:53:22,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:22,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 09:53:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:22,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:53:22,618 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:53:22,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:53:22,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:53:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:53:22,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:22,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:53:22,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:53:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:53:23,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489851867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:23,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:23,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 39 [2022-07-22 09:53:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397252122] [2022-07-22 09:53:23,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:23,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:53:23,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:53:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:53:23,014 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:37,146 INFO L93 Difference]: Finished difference Result 870 states and 1182 transitions. [2022-07-22 09:53:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-22 09:53:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-22 09:53:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:37,151 INFO L225 Difference]: With dead ends: 870 [2022-07-22 09:53:37,152 INFO L226 Difference]: Without dead ends: 868 [2022-07-22 09:53:37,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41395 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5797, Invalid=95645, Unknown=0, NotChecked=0, Total=101442 [2022-07-22 09:53:37,157 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4042 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 3277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4042 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3277 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:37,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4042 Valid, 478 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3277 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 09:53:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-07-22 09:53:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 84. [2022-07-22 09:53:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-07-22 09:53:37,187 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 72 [2022-07-22 09:53:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:37,187 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-07-22 09:53:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-07-22 09:53:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 09:53:37,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:37,188 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:37,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 09:53:37,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:37,397 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash -803080396, now seen corresponding path program 3 times [2022-07-22 09:53:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411005421] [2022-07-22 09:53:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:38,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:38,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411005421] [2022-07-22 09:53:38,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411005421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:38,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415254527] [2022-07-22 09:53:38,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:38,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:38,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:38,528 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:38,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 09:53:38,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 09:53:38,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:53:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:38,893 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:53:38,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:53:39,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:53:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:53:39,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:39,267 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:53:39,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:53:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:53:39,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415254527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:39,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:39,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2022-07-22 09:53:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522501431] [2022-07-22 09:53:39,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:39,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 09:53:39,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 09:53:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 09:53:39,319 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 42 states, 42 states have (on average 3.1666666666666665) internal successors, (133), 42 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:45,967 INFO L93 Difference]: Finished difference Result 860 states and 1172 transitions. [2022-07-22 09:53:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-07-22 09:53:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.1666666666666665) internal successors, (133), 42 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-22 09:53:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:45,971 INFO L225 Difference]: With dead ends: 860 [2022-07-22 09:53:45,971 INFO L226 Difference]: Without dead ends: 858 [2022-07-22 09:53:45,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10971 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2554, Invalid=29308, Unknown=0, NotChecked=0, Total=31862 [2022-07-22 09:53:45,974 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2078 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 1774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1774 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:45,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2078 Valid, 341 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1774 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 09:53:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-07-22 09:53:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 77. [2022-07-22 09:53:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-07-22 09:53:46,005 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 72 [2022-07-22 09:53:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:46,005 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-07-22 09:53:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.1666666666666665) internal successors, (133), 42 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-07-22 09:53:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 09:53:46,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:46,006 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:46,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-22 09:53:46,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:46,211 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1422773160, now seen corresponding path program 15 times [2022-07-22 09:53:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:46,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106030579] [2022-07-22 09:53:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:46,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106030579] [2022-07-22 09:53:47,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106030579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433138055] [2022-07-22 09:53:47,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:47,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:47,068 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:47,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 09:53:47,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 09:53:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:47,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 09:53:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:47,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:53:47,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:53:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:53:47,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:47,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:53:47,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:53:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:53:47,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433138055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:47,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:47,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 42 [2022-07-22 09:53:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540088394] [2022-07-22 09:53:47,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:47,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 09:53:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 09:53:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1583, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 09:53:47,957 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:16,609 INFO L93 Difference]: Finished difference Result 1723 states and 2355 transitions. [2022-07-22 09:54:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 581 states. [2022-07-22 09:54:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-22 09:54:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:16,614 INFO L225 Difference]: With dead ends: 1723 [2022-07-22 09:54:16,614 INFO L226 Difference]: Without dead ends: 1721 [2022-07-22 09:54:16,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 608 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170674 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=21662, Invalid=349828, Unknown=0, NotChecked=0, Total=371490 [2022-07-22 09:54:16,634 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8439 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 7062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8439 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 9569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7062 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:16,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8439 Valid, 474 Invalid, 9569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7062 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 09:54:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-22 09:54:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 90. [2022-07-22 09:54:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-07-22 09:54:16,686 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 76 [2022-07-22 09:54:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:16,686 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-07-22 09:54:16,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-07-22 09:54:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 09:54:16,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:16,687 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:16,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:16,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 09:54:16,898 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 578767658, now seen corresponding path program 3 times [2022-07-22 09:54:16,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:16,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769890712] [2022-07-22 09:54:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:18,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769890712] [2022-07-22 09:54:18,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769890712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777819052] [2022-07-22 09:54:18,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:54:18,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:18,037 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:18,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 09:54:18,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 09:54:18,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:54:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:18,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:54:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:54:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:18,901 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:54:18,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:54:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 09:54:18,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777819052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:18,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:18,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 45 [2022-07-22 09:54:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180526165] [2022-07-22 09:54:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 09:54:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 09:54:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1817, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:54:18,976 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:31,836 INFO L93 Difference]: Finished difference Result 1713 states and 2345 transitions. [2022-07-22 09:54:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-22 09:54:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-22 09:54:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:31,842 INFO L225 Difference]: With dead ends: 1713 [2022-07-22 09:54:31,842 INFO L226 Difference]: Without dead ends: 1711 [2022-07-22 09:54:31,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38966 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=7347, Invalid=87825, Unknown=0, NotChecked=0, Total=95172 [2022-07-22 09:54:31,849 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4202 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 3541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 6251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3541 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:31,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4202 Valid, 421 Invalid, 6251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3541 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 09:54:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-07-22 09:54:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 81. [2022-07-22 09:54:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-07-22 09:54:31,900 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 76 [2022-07-22 09:54:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:31,900 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-07-22 09:54:31,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-07-22 09:54:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 09:54:31,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:31,901 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:31,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 09:54:32,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 09:54:32,115 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1696722206, now seen corresponding path program 16 times [2022-07-22 09:54:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:32,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265692436] [2022-07-22 09:54:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:54:32,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:32,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265692436] [2022-07-22 09:54:32,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265692436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:32,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145275085] [2022-07-22 09:54:32,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:54:32,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:32,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:32,300 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:32,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 09:54:32,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:54:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 09:54:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:54:32,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:54:32,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145275085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:32,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:32,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-22 09:54:32,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951667038] [2022-07-22 09:54:32,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 09:54:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 09:54:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:54:32,776 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:33,278 INFO L93 Difference]: Finished difference Result 220 states and 257 transitions. [2022-07-22 09:54:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 09:54:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-22 09:54:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:33,279 INFO L225 Difference]: With dead ends: 220 [2022-07-22 09:54:33,279 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 09:54:33,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:54:33,280 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 396 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:33,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 162 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:54:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 09:54:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2022-07-22 09:54:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-07-22 09:54:33,316 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 80 [2022-07-22 09:54:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:33,317 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-07-22 09:54:33,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-07-22 09:54:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 09:54:33,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:33,318 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:33,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:33,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 09:54:33,528 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1951988932, now seen corresponding path program 17 times [2022-07-22 09:54:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180241727] [2022-07-22 09:54:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:33,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:54:33,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:33,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180241727] [2022-07-22 09:54:33,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180241727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:33,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652905665] [2022-07-22 09:54:33,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:54:33,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:33,904 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:33,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 09:54:34,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 09:54:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:34,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:54:34,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 51 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:54:34,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 81 proven. 34 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:54:35,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652905665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:35,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:35,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-07-22 09:54:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111662418] [2022-07-22 09:54:35,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:35,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 09:54:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 09:54:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:54:35,424 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:36,077 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2022-07-22 09:54:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:54:36,077 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-22 09:54:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:36,078 INFO L225 Difference]: With dead ends: 143 [2022-07-22 09:54:36,078 INFO L226 Difference]: Without dead ends: 106 [2022-07-22 09:54:36,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=907, Invalid=2999, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 09:54:36,078 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 496 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:36,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 149 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:54:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-22 09:54:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2022-07-22 09:54:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 87 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2022-07-22 09:54:36,121 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 82 [2022-07-22 09:54:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:36,121 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2022-07-22 09:54:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2022-07-22 09:54:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 09:54:36,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:36,122 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:36,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:36,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:36,325 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1954581362, now seen corresponding path program 18 times [2022-07-22 09:54:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:36,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5297262] [2022-07-22 09:54:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 39 proven. 97 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:54:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5297262] [2022-07-22 09:54:36,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5297262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004998509] [2022-07-22 09:54:36,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:54:36,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:36,780 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:36,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 09:54:37,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-22 09:54:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:54:37,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:54:37,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 55 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 09:54:38,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004998509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:38,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:38,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2022-07-22 09:54:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662361660] [2022-07-22 09:54:38,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:38,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:54:38,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:54:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2105, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:54:38,217 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:38,686 INFO L93 Difference]: Finished difference Result 166 states and 190 transitions. [2022-07-22 09:54:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 09:54:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-22 09:54:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:38,687 INFO L225 Difference]: With dead ends: 166 [2022-07-22 09:54:38,687 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 09:54:38,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=2736, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:54:38,689 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 298 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:38,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 88 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:54:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 09:54:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-07-22 09:54:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.146067415730337) internal successors, (102), 89 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-07-22 09:54:38,727 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 87 [2022-07-22 09:54:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:38,727 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-07-22 09:54:38,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-07-22 09:54:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 09:54:38,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:38,728 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:38,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-22 09:54:38,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:38,929 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1687811988, now seen corresponding path program 19 times [2022-07-22 09:54:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:38,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611975082] [2022-07-22 09:54:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 36 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611975082] [2022-07-22 09:54:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611975082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:40,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937704140] [2022-07-22 09:54:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:54:40,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:40,203 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:40,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 09:54:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:40,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:54:40,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:40,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:54:40,497 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:54:40,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:54:40,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:54:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 09:54:40,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:41,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:54:41,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:54:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 09:54:41,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937704140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:41,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:41,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 57 [2022-07-22 09:54:41,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033112799] [2022-07-22 09:54:41,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 09:54:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:41,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 09:54:41,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2996, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 09:54:41,371 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 57 states, 57 states have (on average 3.4035087719298245) internal successors, (194), 57 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:16,748 INFO L93 Difference]: Finished difference Result 1843 states and 2547 transitions. [2022-07-22 09:55:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2022-07-22 09:55:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.4035087719298245) internal successors, (194), 57 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-22 09:55:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:16,754 INFO L225 Difference]: With dead ends: 1843 [2022-07-22 09:55:16,754 INFO L226 Difference]: Without dead ends: 1841 [2022-07-22 09:55:16,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138791 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=22295, Invalid=311211, Unknown=0, NotChecked=0, Total=333506 [2022-07-22 09:55:16,769 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6929 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 3912 mSolverCounterSat, 6051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6929 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 9963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6051 IncrementalHoareTripleChecker+Valid, 3912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:16,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6929 Valid, 801 Invalid, 9963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6051 Valid, 3912 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 09:55:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2022-07-22 09:55:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 101. [2022-07-22 09:55:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2022-07-22 09:55:16,895 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 89 [2022-07-22 09:55:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:16,895 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2022-07-22 09:55:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.4035087719298245) internal successors, (194), 57 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2022-07-22 09:55:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 09:55:16,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:16,896 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:16,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:17,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:17,111 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2111458710, now seen corresponding path program 4 times [2022-07-22 09:55:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:17,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541557256] [2022-07-22 09:55:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:18,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:18,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541557256] [2022-07-22 09:55:18,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541557256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:18,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357501892] [2022-07-22 09:55:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:55:18,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:18,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:18,348 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:18,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 09:55:18,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:55:18,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:55:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:18,667 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:55:18,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:55:18,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:55:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 09:55:18,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:19,137 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-22 09:55:19,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-22 09:55:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 09:55:19,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357501892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:19,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:19,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19, 19] total 50 [2022-07-22 09:55:19,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943046326] [2022-07-22 09:55:19,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:55:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:55:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:55:19,233 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:48,065 INFO L93 Difference]: Finished difference Result 3212 states and 4476 transitions. [2022-07-22 09:55:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2022-07-22 09:55:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-22 09:55:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:48,073 INFO L225 Difference]: With dead ends: 3212 [2022-07-22 09:55:48,073 INFO L226 Difference]: Without dead ends: 3210 [2022-07-22 09:55:48,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 163 SyntacticMatches, 9 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117650 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=12227, Invalid=261825, Unknown=0, NotChecked=0, Total=274052 [2022-07-22 09:55:48,083 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9975 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 3625 mSolverCounterSat, 7979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9975 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 11604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7979 IncrementalHoareTripleChecker+Valid, 3625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:48,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9975 Valid, 615 Invalid, 11604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7979 Valid, 3625 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-22 09:55:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2022-07-22 09:55:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 94. [2022-07-22 09:55:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2022-07-22 09:55:48,163 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 89 [2022-07-22 09:55:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:48,164 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2022-07-22 09:55:48,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.26) internal successors, (163), 50 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2022-07-22 09:55:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 09:55:48,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:48,165 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:48,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 09:55:48,371 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 433996554, now seen corresponding path program 20 times [2022-07-22 09:55:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366211381] [2022-07-22 09:55:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366211381] [2022-07-22 09:55:49,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366211381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780737914] [2022-07-22 09:55:49,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:55:49,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:49,347 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:49,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 09:55:49,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:55:49,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:55:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:49,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:55:49,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:55:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 09:55:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:50,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:55:50,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-22 09:55:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 09:55:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780737914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:50,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:50,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 19] total 50 [2022-07-22 09:55:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184590045] [2022-07-22 09:55:50,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:50,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:55:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:55:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:55:50,242 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)