./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.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 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:07:20,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:07:20,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:07:20,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:07:20,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:07:20,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:07:20,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:07:20,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:07:20,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:07:20,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:07:20,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:07:20,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:07:20,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:07:20,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:07:20,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:07:20,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:07:20,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:07:20,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:07:20,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:07:20,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:07:20,889 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:07:20,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:07:20,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:07:20,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:07:20,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:07:20,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:07:20,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:07:20,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:07:20,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:07:20,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:07:20,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:07:20,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:07:20,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:07:20,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:07:20,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:07:20,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:07:20,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:07:20,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:07:20,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:07:20,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:07:20,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:07:20,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:07:20,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:07:20,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:07:20,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:07:20,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:07:20,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:07:20,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:07:20,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:07:20,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:07:20,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:07:20,930 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:07:20,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:07:20,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:07:20,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:07:20,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:07:20,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:07:20,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:07:20,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:07:20,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:07:20,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:07:20,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:07:20,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:07:20,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:07:20,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 [2022-07-13 18:07:21,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:07:21,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:07:21,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:07:21,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:07:21,210 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:07:21,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2022-07-13 18:07:21,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237ebc06d/c8ef2531060c48c0ad75dc1422b0af71/FLAG84e2d3ba1 [2022-07-13 18:07:21,578 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:07:21,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2022-07-13 18:07:21,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237ebc06d/c8ef2531060c48c0ad75dc1422b0af71/FLAG84e2d3ba1 [2022-07-13 18:07:22,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237ebc06d/c8ef2531060c48c0ad75dc1422b0af71 [2022-07-13 18:07:22,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:07:22,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:07:22,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:07:22,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:07:22,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:07:22,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ba18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22, skipping insertion in model container [2022-07-13 18:07:22,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:07:22,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:07:22,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2022-07-13 18:07:22,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:07:22,210 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:07:22,219 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2022-07-13 18:07:22,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:07:22,228 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:07:22,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22 WrapperNode [2022-07-13 18:07:22,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:07:22,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:07:22,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:07:22,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:07:22,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,249 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-07-13 18:07:22,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:07:22,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:07:22,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:07:22,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:07:22,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:07:22,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:07:22,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:07:22,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:07:22,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (1/1) ... [2022-07-13 18:07:22,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:07:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:22,286 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) [2022-07-13 18:07:22,323 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 [2022-07-13 18:07:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:07:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:07:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:07:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:07:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-13 18:07:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-13 18:07:22,389 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:07:22,390 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:07:22,447 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:07:22,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:07:22,460 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 18:07:22,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:07:22 BoogieIcfgContainer [2022-07-13 18:07:22,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:07:22,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:07:22,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:07:22,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:07:22,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:07:22" (1/3) ... [2022-07-13 18:07:22,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e250eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:07:22, skipping insertion in model container [2022-07-13 18:07:22,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:22" (2/3) ... [2022-07-13 18:07:22,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e250eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:07:22, skipping insertion in model container [2022-07-13 18:07:22,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:07:22" (3/3) ... [2022-07-13 18:07:22,480 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2022-07-13 18:07:22,503 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:07:22,503 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:07:22,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:07:22,570 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@6612fe56, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d24a7fe [2022-07-13 18:07:22,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:07:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 18:07:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 18:07:22,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:22,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:22,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-07-13 18:07:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:22,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636694558] [2022-07-13 18:07:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:22,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:22,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:07:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636694558] [2022-07-13 18:07:22,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636694558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:07:22,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:07:22,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:07:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399758801] [2022-07-13 18:07:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:07:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:07:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:07:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:22,793 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 18:07:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:22,837 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-13 18:07:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:07:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-13 18:07:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:22,844 INFO L225 Difference]: With dead ends: 25 [2022-07-13 18:07:22,844 INFO L226 Difference]: Without dead ends: 15 [2022-07-13 18:07:22,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:07:22,850 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:22,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-13 18:07:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-13 18:07:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 18:07:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-13 18:07:22,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-13 18:07:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:22,875 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-13 18:07:22,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 18:07:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-13 18:07:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 18:07:22,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:22,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:22,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:07:22,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-07-13 18:07:22,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615658701] [2022-07-13 18:07:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:22,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:22,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:07:22,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:22,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615658701] [2022-07-13 18:07:22,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615658701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:22,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38685419] [2022-07-13 18:07:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:22,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:22,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:22,943 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) [2022-07-13 18:07:22,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:07:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:22,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 18:07:22,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:07:23,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 18:07:23,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38685419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:23,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:23,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2022-07-13 18:07:23,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540054032] [2022-07-13 18:07:23,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 18:07:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 18:07:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:07:23,158 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 18:07:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:23,204 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-07-13 18:07:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:07:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-07-13 18:07:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:23,205 INFO L225 Difference]: With dead ends: 22 [2022-07-13 18:07:23,205 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 18:07:23,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-13 18:07:23,207 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:23,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 18:07:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 18:07:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 18:07:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-13 18:07:23,211 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-13 18:07:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:23,211 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-13 18:07:23,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 18:07:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-13 18:07:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 18:07:23,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:23,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:23,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:23,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-07-13 18:07:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105574934] [2022-07-13 18:07:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:23,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:23,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:07:23,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105574934] [2022-07-13 18:07:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105574934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621380570] [2022-07-13 18:07:23,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:07:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:23,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:23,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:07:23,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:07:23,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:07:23,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 18:07:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:07:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:07:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621380570] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:23,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:23,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2022-07-13 18:07:23,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907407752] [2022-07-13 18:07:23,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:23,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 18:07:23,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 18:07:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-13 18:07:23,867 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 18:07:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:23,908 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-07-13 18:07:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:07:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-07-13 18:07:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:23,909 INFO L225 Difference]: With dead ends: 25 [2022-07-13 18:07:23,909 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 18:07:23,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:07:23,910 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:23,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 18:07:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-13 18:07:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:07:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-13 18:07:23,920 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-07-13 18:07:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:23,920 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-13 18:07:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 18:07:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-13 18:07:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 18:07:23,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:23,921 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:23,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 18:07:24,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-07-13 18:07:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:24,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424514510] [2022-07-13 18:07:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:07:24,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:24,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424514510] [2022-07-13 18:07:24,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424514510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:24,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698116235] [2022-07-13 18:07:24,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:07:24,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:24,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:24,220 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) [2022-07-13 18:07:24,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:07:24,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 18:07:24,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 18:07:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:07:24,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:07:24,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698116235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:24,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:24,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 15 [2022-07-13 18:07:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88961800] [2022-07-13 18:07:24,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:24,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 18:07:24,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 18:07:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:07:24,649 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-13 18:07:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:24,694 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-13 18:07:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 18:07:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-07-13 18:07:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:24,695 INFO L225 Difference]: With dead ends: 28 [2022-07-13 18:07:24,695 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 18:07:24,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-07-13 18:07:24,696 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:24,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 47 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 18:07:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 18:07:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 18:07:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-07-13 18:07:24,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-07-13 18:07:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:24,701 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-07-13 18:07:24,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-13 18:07:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-07-13 18:07:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 18:07:24,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:24,702 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:24,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:24,919 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-07-13 18:07:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:24,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385168801] [2022-07-13 18:07:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:24,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 18:07:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:25,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385168801] [2022-07-13 18:07:25,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385168801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:25,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553838711] [2022-07-13 18:07:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:07:25,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:25,031 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) [2022-07-13 18:07:25,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 18:07:25,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:07:25,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 18:07:25,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 18:07:25,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:07:25,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553838711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:25,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:25,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 17 [2022-07-13 18:07:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509684079] [2022-07-13 18:07:25,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:25,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 18:07:25,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 18:07:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:07:25,574 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-13 18:07:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:25,627 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-07-13 18:07:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:07:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-07-13 18:07:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:25,628 INFO L225 Difference]: With dead ends: 31 [2022-07-13 18:07:25,628 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 18:07:25,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-07-13 18:07:25,629 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:25,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 18:07:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 18:07:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 18:07:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-07-13 18:07:25,632 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-07-13 18:07:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:25,633 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-07-13 18:07:25,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-13 18:07:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-07-13 18:07:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 18:07:25,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:25,634 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:25,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:25,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:25,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-07-13 18:07:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944478380] [2022-07-13 18:07:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 18:07:25,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944478380] [2022-07-13 18:07:25,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944478380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236084951] [2022-07-13 18:07:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:07:25,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:25,963 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) [2022-07-13 18:07:25,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 18:07:26,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 18:07:26,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 18:07:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 18:07:26,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:07:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236084951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:26,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:26,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 19 [2022-07-13 18:07:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836845912] [2022-07-13 18:07:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 18:07:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 18:07:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-13 18:07:26,760 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-13 18:07:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:26,817 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-07-13 18:07:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:07:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-07-13 18:07:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:26,818 INFO L225 Difference]: With dead ends: 34 [2022-07-13 18:07:26,818 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 18:07:26,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2022-07-13 18:07:26,819 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:26,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 72 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 18:07:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 18:07:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 18:07:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-13 18:07:26,822 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-07-13 18:07:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:26,822 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-13 18:07:26,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-13 18:07:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-13 18:07:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 18:07:26,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:26,823 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:26,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:27,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-07-13 18:07:27,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:27,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790593256] [2022-07-13 18:07:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:27,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-13 18:07:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790593256] [2022-07-13 18:07:27,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790593256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160849300] [2022-07-13 18:07:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:07:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:27,162 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) [2022-07-13 18:07:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 18:07:27,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-13 18:07:27,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 18:07:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-13 18:07:27,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 18:07:28,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160849300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:28,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:28,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 21 [2022-07-13 18:07:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117507634] [2022-07-13 18:07:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 18:07:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 18:07:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-07-13 18:07:28,310 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-13 18:07:28,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:28,402 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-07-13 18:07:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 18:07:28,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-07-13 18:07:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:28,403 INFO L225 Difference]: With dead ends: 37 [2022-07-13 18:07:28,403 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 18:07:28,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2022-07-13 18:07:28,404 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:28,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:07:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 18:07:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-13 18:07:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 18:07:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-13 18:07:28,408 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-07-13 18:07:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:28,408 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-13 18:07:28,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-13 18:07:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-13 18:07:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 18:07:28,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:28,410 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:28,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:28,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-07-13 18:07:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:28,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488353056] [2022-07-13 18:07:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-13 18:07:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488353056] [2022-07-13 18:07:28,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488353056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166711855] [2022-07-13 18:07:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:07:28,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:28,759 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) [2022-07-13 18:07:28,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 18:07:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 18:07:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-13 18:07:28,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 18:07:30,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166711855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:30,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:30,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2022-07-13 18:07:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196779885] [2022-07-13 18:07:30,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 18:07:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 18:07:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2022-07-13 18:07:30,293 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-13 18:07:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:30,358 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-13 18:07:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 18:07:30,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-07-13 18:07:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:30,359 INFO L225 Difference]: With dead ends: 40 [2022-07-13 18:07:30,359 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 18:07:30,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2022-07-13 18:07:30,360 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:30,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 18:07:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-13 18:07:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-13 18:07:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-13 18:07:30,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-07-13 18:07:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:30,363 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-13 18:07:30,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-13 18:07:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-13 18:07:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 18:07:30,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:30,364 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:30,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:30,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-07-13 18:07:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575349779] [2022-07-13 18:07:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 18:07:30,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575349779] [2022-07-13 18:07:30,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575349779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606611439] [2022-07-13 18:07:30,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:07:30,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:30,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:30,760 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) [2022-07-13 18:07:30,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 18:07:30,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:07:30,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:30,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 18:07:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 18:07:30,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 18:07:32,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606611439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:32,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:32,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 25 [2022-07-13 18:07:32,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417969257] [2022-07-13 18:07:32,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:32,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 18:07:32,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:32,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 18:07:32,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-07-13 18:07:32,876 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-13 18:07:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:32,957 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-07-13 18:07:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 18:07:32,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-07-13 18:07:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:32,959 INFO L225 Difference]: With dead ends: 43 [2022-07-13 18:07:32,959 INFO L226 Difference]: Without dead ends: 39 [2022-07-13 18:07:32,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 18:07:32,960 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:32,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 87 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-13 18:07:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-13 18:07:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-13 18:07:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-13 18:07:32,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-07-13 18:07:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:32,966 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-13 18:07:32,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-13 18:07:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-13 18:07:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 18:07:32,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:32,967 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:32,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 18:07:33,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 18:07:33,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-07-13 18:07:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:33,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848652648] [2022-07-13 18:07:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:33,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-13 18:07:33,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:33,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848652648] [2022-07-13 18:07:33,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848652648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:33,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300991771] [2022-07-13 18:07:33,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:07:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:33,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:33,376 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) [2022-07-13 18:07:33,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 18:07:33,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-13 18:07:33,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:33,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 18:07:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-13 18:07:33,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 18:07:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300991771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:35,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:35,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 27 [2022-07-13 18:07:35,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880893068] [2022-07-13 18:07:35,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:35,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 18:07:35,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 18:07:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-07-13 18:07:35,956 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-07-13 18:07:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:36,044 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-07-13 18:07:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:07:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2022-07-13 18:07:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:36,048 INFO L225 Difference]: With dead ends: 46 [2022-07-13 18:07:36,050 INFO L226 Difference]: Without dead ends: 42 [2022-07-13 18:07:36,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=434, Invalid=898, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 18:07:36,055 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:36,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 84 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-13 18:07:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-13 18:07:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-13 18:07:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-07-13 18:07:36,059 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-07-13 18:07:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:36,059 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-07-13 18:07:36,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-07-13 18:07:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-07-13 18:07:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 18:07:36,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:36,060 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:36,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 18:07:36,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 18:07:36,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-07-13 18:07:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:36,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49419710] [2022-07-13 18:07:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:36,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-13 18:07:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49419710] [2022-07-13 18:07:36,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49419710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758849499] [2022-07-13 18:07:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:07:36,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:36,520 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) [2022-07-13 18:07:36,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 18:07:36,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:07:36,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 18:07:36,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-13 18:07:36,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-13 18:07:39,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758849499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:39,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:39,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 29 [2022-07-13 18:07:39,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102546704] [2022-07-13 18:07:39,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:39,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 18:07:39,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 18:07:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2022-07-13 18:07:39,417 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-07-13 18:07:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:39,527 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-07-13 18:07:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:07:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2022-07-13 18:07:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:39,529 INFO L225 Difference]: With dead ends: 49 [2022-07-13 18:07:39,529 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 18:07:39,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 18:07:39,530 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:39,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 97 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 18:07:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-13 18:07:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 18:07:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-13 18:07:39,543 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-07-13 18:07:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:39,544 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-13 18:07:39,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-07-13 18:07:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-13 18:07:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 18:07:39,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:39,545 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:39,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-13 18:07:39,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 18:07:39,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-07-13 18:07:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616305758] [2022-07-13 18:07:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-13 18:07:39,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616305758] [2022-07-13 18:07:39,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616305758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773602308] [2022-07-13 18:07:39,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:07:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:39,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:39,991 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) [2022-07-13 18:07:40,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 18:07:40,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-13 18:07:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 18:07:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-13 18:07:40,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 18:07:43,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773602308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:43,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:43,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 31 [2022-07-13 18:07:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990510878] [2022-07-13 18:07:43,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 18:07:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 18:07:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-07-13 18:07:43,120 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-07-13 18:07:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:43,273 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-07-13 18:07:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 18:07:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2022-07-13 18:07:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:43,274 INFO L225 Difference]: With dead ends: 52 [2022-07-13 18:07:43,274 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 18:07:43,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 18:07:43,275 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:43,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:07:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 18:07:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-13 18:07:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-13 18:07:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-07-13 18:07:43,278 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2022-07-13 18:07:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:43,278 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-07-13 18:07:43,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-07-13 18:07:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-07-13 18:07:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 18:07:43,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:43,279 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:43,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 18:07:43,482 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2022-07-13 18:07:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:43,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543020304] [2022-07-13 18:07:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-13 18:07:43,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:43,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543020304] [2022-07-13 18:07:43,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543020304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:43,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883972127] [2022-07-13 18:07:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:07:43,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:43,718 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) [2022-07-13 18:07:43,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 18:07:44,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-13 18:07:44,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 18:07:44,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-13 18:07:44,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 18:07:47,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883972127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:47,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:47,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 33 [2022-07-13 18:07:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517969735] [2022-07-13 18:07:47,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:47,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 18:07:47,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 18:07:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 18:07:47,592 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-07-13 18:07:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:47,675 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-07-13 18:07:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:07:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2022-07-13 18:07:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:47,677 INFO L225 Difference]: With dead ends: 55 [2022-07-13 18:07:47,677 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 18:07:47,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 18:07:47,678 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:47,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 18:07:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-13 18:07:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-13 18:07:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-07-13 18:07:47,681 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2022-07-13 18:07:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:47,681 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-07-13 18:07:47,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-07-13 18:07:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-07-13 18:07:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 18:07:47,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:47,682 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:47,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 18:07:47,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 18:07:47,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2022-07-13 18:07:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950814337] [2022-07-13 18:07:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-13 18:07:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950814337] [2022-07-13 18:07:48,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950814337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538733478] [2022-07-13 18:07:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:07:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:48,251 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) [2022-07-13 18:07:48,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 18:07:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 18:07:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-13 18:07:48,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:07:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-13 18:07:54,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538733478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:07:54,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:07:54,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 35 [2022-07-13 18:07:54,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857041149] [2022-07-13 18:07:54,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:07:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 18:07:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 18:07:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 18:07:54,483 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-07-13 18:07:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:54,634 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-07-13 18:07:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 18:07:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2022-07-13 18:07:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:54,635 INFO L225 Difference]: With dead ends: 58 [2022-07-13 18:07:54,635 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 18:07:54,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=770, Invalid=1582, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 18:07:54,636 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:54,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 133 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 18:07:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-13 18:07:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-13 18:07:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-13 18:07:54,639 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2022-07-13 18:07:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:54,639 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-13 18:07:54,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-07-13 18:07:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-13 18:07:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 18:07:54,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:54,640 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:54,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 18:07:54,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 18:07:54,841 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:54,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2022-07-13 18:07:54,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:54,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620963526] [2022-07-13 18:07:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:54,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:54,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:54,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:54,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:54,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-13 18:07:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620963526] [2022-07-13 18:07:55,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620963526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:07:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622991211] [2022-07-13 18:07:55,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:07:55,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:07:55,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:55,146 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) [2022-07-13 18:07:55,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 18:07:55,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:07:55,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:07:55,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 18:07:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:07:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-13 18:07:55,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:08:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-13 18:08:03,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622991211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:08:03,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:08:03,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 37 [2022-07-13 18:08:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655200647] [2022-07-13 18:08:03,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:08:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 18:08:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:08:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 18:08:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 18:08:03,187 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2022-07-13 18:08:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:08:03,337 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-07-13 18:08:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 18:08:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2022-07-13 18:08:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:08:03,338 INFO L225 Difference]: With dead ends: 61 [2022-07-13 18:08:03,338 INFO L226 Difference]: Without dead ends: 57 [2022-07-13 18:08:03,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=869, Invalid=1783, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 18:08:03,343 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:08:03,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 131 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:08:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-13 18:08:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-13 18:08:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-13 18:08:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-13 18:08:03,352 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2022-07-13 18:08:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:08:03,352 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-13 18:08:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2022-07-13 18:08:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-13 18:08:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-13 18:08:03,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:08:03,353 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:08:03,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 18:08:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:03,554 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:08:03,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:08:03,554 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2022-07-13 18:08:03,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:08:03,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009424930] [2022-07-13 18:08:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:08:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:08:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-13 18:08:03,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:08:03,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009424930] [2022-07-13 18:08:03,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009424930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:08:03,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083759826] [2022-07-13 18:08:03,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:08:03,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:03,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:08:03,911 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) [2022-07-13 18:08:03,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 18:08:04,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-13 18:08:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:08:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 18:08:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:08:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-13 18:08:04,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:08:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-13 18:08:11,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083759826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:08:11,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:08:11,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 39 [2022-07-13 18:08:11,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515370640] [2022-07-13 18:08:11,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:08:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 18:08:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:08:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 18:08:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 18:08:11,799 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2022-07-13 18:08:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:08:11,944 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-07-13 18:08:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 18:08:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2022-07-13 18:08:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:08:11,945 INFO L225 Difference]: With dead ends: 64 [2022-07-13 18:08:11,945 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 18:08:11,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=974, Invalid=1996, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 18:08:11,947 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 406 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:08:11,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 137 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:08:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 18:08:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-13 18:08:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-13 18:08:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-13 18:08:11,956 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2022-07-13 18:08:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:08:11,956 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-13 18:08:11,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2022-07-13 18:08:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-13 18:08:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 18:08:11,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:08:11,958 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:08:11,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 18:08:12,179 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,SelfDestructingSolverStorable15 [2022-07-13 18:08:12,179 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:08:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:08:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2022-07-13 18:08:12,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:08:12,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994189347] [2022-07-13 18:08:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:08:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:08:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-07-13 18:08:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:08:12,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994189347] [2022-07-13 18:08:12,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994189347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:08:12,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092457475] [2022-07-13 18:08:12,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:08:12,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:08:12,526 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) [2022-07-13 18:08:12,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 18:08:13,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:08:13,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:08:13,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 18:08:13,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:08:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-07-13 18:08:13,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:08:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-13 18:08:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092457475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:08:21,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:08:21,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 41 [2022-07-13 18:08:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962270744] [2022-07-13 18:08:21,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:08:21,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 18:08:21,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:08:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 18:08:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 18:08:21,722 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2022-07-13 18:08:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:08:21,880 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-07-13 18:08:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 18:08:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2022-07-13 18:08:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:08:21,881 INFO L225 Difference]: With dead ends: 67 [2022-07-13 18:08:21,881 INFO L226 Difference]: Without dead ends: 63 [2022-07-13 18:08:21,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1085, Invalid=2221, Unknown=0, NotChecked=0, Total=3306 [2022-07-13 18:08:21,884 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:08:21,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 135 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:08:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-13 18:08:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-13 18:08:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-13 18:08:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-07-13 18:08:21,893 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2022-07-13 18:08:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:08:21,896 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-07-13 18:08:21,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2022-07-13 18:08:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-07-13 18:08:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 18:08:21,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:08:21,898 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:08:21,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 18:08:22,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 18:08:22,117 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:08:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:08:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2022-07-13 18:08:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:08:22,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235163847] [2022-07-13 18:08:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:08:22,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:08:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-13 18:08:22,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:08:22,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235163847] [2022-07-13 18:08:22,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235163847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:08:22,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355953108] [2022-07-13 18:08:22,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:08:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:08:22,453 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) [2022-07-13 18:08:22,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 18:08:23,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-13 18:08:23,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:08:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 18:08:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:08:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-13 18:08:23,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:08:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-13 18:08:32,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355953108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:08:32,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:08:32,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 43 [2022-07-13 18:08:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111549749] [2022-07-13 18:08:32,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:08:32,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 18:08:32,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:08:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 18:08:32,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1325, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 18:08:32,604 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2022-07-13 18:08:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:08:32,722 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-07-13 18:08:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 18:08:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2022-07-13 18:08:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:08:32,724 INFO L225 Difference]: With dead ends: 70 [2022-07-13 18:08:32,724 INFO L226 Difference]: Without dead ends: 66 [2022-07-13 18:08:32,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1202, Invalid=2458, Unknown=0, NotChecked=0, Total=3660 [2022-07-13 18:08:32,725 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:08:32,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 160 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:08:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-13 18:08:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-13 18:08:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 18:08:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-07-13 18:08:32,731 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2022-07-13 18:08:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:08:32,731 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-07-13 18:08:32,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2022-07-13 18:08:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-07-13 18:08:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-13 18:08:32,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:08:32,732 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:08:32,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 18:08:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 18:08:32,940 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:08:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:08:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2022-07-13 18:08:32,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:08:32,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879359320] [2022-07-13 18:08:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:08:32,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:08:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-13 18:08:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:08:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879359320] [2022-07-13 18:08:33,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879359320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:08:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756279469] [2022-07-13 18:08:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:08:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:08:33,292 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) [2022-07-13 18:08:33,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 18:08:34,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-13 18:08:34,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:08:34,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 18:08:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:08:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-13 18:08:34,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:08:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-13 18:08:48,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756279469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:08:48,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:08:48,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 45 [2022-07-13 18:08:48,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865482824] [2022-07-13 18:08:48,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:08:48,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 18:08:48,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:08:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 18:08:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 18:08:48,496 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2022-07-13 18:08:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:08:48,728 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-07-13 18:08:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 18:08:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 118 [2022-07-13 18:08:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:08:48,729 INFO L225 Difference]: With dead ends: 73 [2022-07-13 18:08:48,729 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 18:08:48,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2022-07-13 18:08:48,731 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:08:48,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 168 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:08:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 18:08:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-13 18:08:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-13 18:08:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-13 18:08:48,733 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2022-07-13 18:08:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:08:48,733 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-13 18:08:48,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2022-07-13 18:08:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-13 18:08:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-13 18:08:48,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:08:48,734 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:08:48,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 18:08:48,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:48,955 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:08:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:08:48,956 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2022-07-13 18:08:48,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:08:48,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743821945] [2022-07-13 18:08:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:08:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:08:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:08:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-07-13 18:08:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:08:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743821945] [2022-07-13 18:08:49,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743821945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:08:49,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050574206] [2022-07-13 18:08:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:08:49,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:08:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:08:49,715 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) [2022-07-13 18:08:49,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 18:08:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:08:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 18:08:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:08:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-07-13 18:08:51,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:09:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-13 18:09:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050574206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:09:11,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:09:11,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 47 [2022-07-13 18:09:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071456624] [2022-07-13 18:09:11,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:09:11,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 18:09:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:09:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 18:09:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 18:09:11,772 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2022-07-13 18:09:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:09:12,187 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-13 18:09:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:09:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) Word has length 124 [2022-07-13 18:09:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:09:12,189 INFO L225 Difference]: With dead ends: 76 [2022-07-13 18:09:12,189 INFO L226 Difference]: Without dead ends: 72 [2022-07-13 18:09:12,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1454, Invalid=2968, Unknown=0, NotChecked=0, Total=4422 [2022-07-13 18:09:12,192 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 874 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:09:12,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 161 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:09:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-13 18:09:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-13 18:09:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-13 18:09:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-13 18:09:12,207 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2022-07-13 18:09:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:09:12,208 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-13 18:09:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2022-07-13 18:09:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-13 18:09:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-13 18:09:12,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:09:12,209 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:09:12,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 18:09:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:09:12,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:09:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:09:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2022-07-13 18:09:12,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:09:12,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764229230] [2022-07-13 18:09:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:09:12,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:09:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:12,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-13 18:09:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:09:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764229230] [2022-07-13 18:09:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764229230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:09:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923748018] [2022-07-13 18:09:13,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:09:13,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:09:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:09:13,468 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) [2022-07-13 18:09:13,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 18:09:15,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:09:15,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:09:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 18:09:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:09:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-13 18:09:15,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:09:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-13 18:09:36,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923748018] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:09:36,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:09:36,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 49 [2022-07-13 18:09:36,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273253160] [2022-07-13 18:09:36,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:09:36,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 18:09:36,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:09:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 18:09:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 18:09:36,643 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2022-07-13 18:09:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:09:36,865 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-07-13 18:09:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 18:09:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) Word has length 130 [2022-07-13 18:09:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:09:36,866 INFO L225 Difference]: With dead ends: 79 [2022-07-13 18:09:36,866 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 18:09:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1589, Invalid=3241, Unknown=0, NotChecked=0, Total=4830 [2022-07-13 18:09:36,867 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 999 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:09:36,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 177 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:09:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 18:09:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-13 18:09:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-13 18:09:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-07-13 18:09:36,870 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2022-07-13 18:09:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:09:36,870 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-07-13 18:09:36,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2022-07-13 18:09:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-07-13 18:09:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-13 18:09:36,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:09:36,874 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:09:36,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 18:09:37,083 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,SelfDestructingSolverStorable20 [2022-07-13 18:09:37,083 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:09:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:09:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2022-07-13 18:09:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:09:37,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42639034] [2022-07-13 18:09:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:09:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:09:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:09:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:09:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-13 18:09:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:09:37,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42639034] [2022-07-13 18:09:37,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42639034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:09:37,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870905047] [2022-07-13 18:09:37,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:09:37,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:09:37,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:09:37,597 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) [2022-07-13 18:09:37,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 18:09:40,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-13 18:09:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:09:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 18:09:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:09:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-13 18:09:40,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:10:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-13 18:10:02,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870905047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:10:02,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:10:02,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 51 [2022-07-13 18:10:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348569213] [2022-07-13 18:10:02,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:10:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 18:10:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:10:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 18:10:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1877, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 18:10:02,533 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2022-07-13 18:10:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:10:02,833 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-07-13 18:10:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 18:10:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) Word has length 136 [2022-07-13 18:10:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:10:02,836 INFO L225 Difference]: With dead ends: 82 [2022-07-13 18:10:02,836 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 18:10:02,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1730, Invalid=3526, Unknown=0, NotChecked=0, Total=5256 [2022-07-13 18:10:02,838 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 507 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:10:02,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 185 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:10:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 18:10:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-13 18:10:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2022-07-13 18:10:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-07-13 18:10:02,840 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2022-07-13 18:10:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:10:02,840 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-07-13 18:10:02,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2022-07-13 18:10:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-07-13 18:10:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-13 18:10:02,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:10:02,841 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:10:02,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 18:10:03,063 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,SelfDestructingSolverStorable21 [2022-07-13 18:10:03,063 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:10:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:10:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2022-07-13 18:10:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:10:03,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205253046] [2022-07-13 18:10:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:10:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:10:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-07-13 18:10:03,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:10:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205253046] [2022-07-13 18:10:03,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205253046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:10:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40433545] [2022-07-13 18:10:03,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:10:03,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:10:03,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:10:03,596 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) [2022-07-13 18:10:03,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 18:10:06,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:10:06,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:10:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 18:10:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:10:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-07-13 18:10:06,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:10:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-13 18:10:27,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40433545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:10:27,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:10:27,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 49] total 53 [2022-07-13 18:10:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24450849] [2022-07-13 18:10:27,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:10:27,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 18:10:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:10:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 18:10:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 18:10:27,181 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2022-07-13 18:10:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:10:27,402 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-07-13 18:10:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 18:10:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) Word has length 142 [2022-07-13 18:10:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:10:27,403 INFO L225 Difference]: With dead ends: 85 [2022-07-13 18:10:27,403 INFO L226 Difference]: Without dead ends: 81 [2022-07-13 18:10:27,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1877, Invalid=3823, Unknown=0, NotChecked=0, Total=5700 [2022-07-13 18:10:27,405 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 383 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:10:27,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 189 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:10:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-13 18:10:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-13 18:10:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 18:10:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-07-13 18:10:27,412 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2022-07-13 18:10:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:10:27,413 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-07-13 18:10:27,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2022-07-13 18:10:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-07-13 18:10:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-13 18:10:27,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:10:27,414 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:10:27,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-13 18:10:27,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:10:27,630 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:10:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:10:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2022-07-13 18:10:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:10:27,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851547733] [2022-07-13 18:10:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:10:27,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:10:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-13 18:10:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:10:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851547733] [2022-07-13 18:10:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851547733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:10:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434702245] [2022-07-13 18:10:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:10:28,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:10:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:10:28,284 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) [2022-07-13 18:10:28,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 18:10:31,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-13 18:10:31,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:10:31,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 18:10:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:10:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-13 18:10:31,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:10:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-13 18:10:58,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434702245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:10:58,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:10:58,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 51] total 55 [2022-07-13 18:10:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058481954] [2022-07-13 18:10:58,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:10:58,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-13 18:10:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:10:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-13 18:10:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 18:10:58,569 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2022-07-13 18:10:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:10:58,818 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-07-13 18:10:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 18:10:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) Word has length 148 [2022-07-13 18:10:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:10:58,820 INFO L225 Difference]: With dead ends: 88 [2022-07-13 18:10:58,820 INFO L226 Difference]: Without dead ends: 84 [2022-07-13 18:10:58,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2030, Invalid=4132, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 18:10:58,821 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:10:58,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 198 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:10:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-13 18:10:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-13 18:10:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-13 18:10:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-07-13 18:10:58,825 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2022-07-13 18:10:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:10:58,825 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-07-13 18:10:58,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2022-07-13 18:10:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-07-13 18:10:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-13 18:10:58,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:10:58,827 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:10:58,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 18:10:59,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:10:59,043 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:10:59,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:10:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2022-07-13 18:10:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:10:59,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076946428] [2022-07-13 18:10:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:10:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:10:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:10:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:10:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-07-13 18:10:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:10:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076946428] [2022-07-13 18:10:59,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076946428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:10:59,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500089223] [2022-07-13 18:10:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:10:59,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:10:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:10:59,682 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) [2022-07-13 18:10:59,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 18:11:03,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-13 18:11:03,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:11:03,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 18:11:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:11:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-07-13 18:11:03,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:11:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-07-13 18:11:32,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500089223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:11:32,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:11:32,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 53] total 56 [2022-07-13 18:11:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720639160] [2022-07-13 18:11:32,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:11:32,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 18:11:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 18:11:32,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=2245, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 18:11:32,503 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2022-07-13 18:11:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:32,888 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-07-13 18:11:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 18:11:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) Word has length 154 [2022-07-13 18:11:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:32,890 INFO L225 Difference]: With dead ends: 91 [2022-07-13 18:11:32,890 INFO L226 Difference]: Without dead ends: 87 [2022-07-13 18:11:32,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2186, Invalid=4294, Unknown=0, NotChecked=0, Total=6480 [2022-07-13 18:11:32,891 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 159 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:32,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 201 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:11:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-13 18:11:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-13 18:11:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-07-13 18:11:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-07-13 18:11:32,893 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2022-07-13 18:11:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:32,894 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-07-13 18:11:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2022-07-13 18:11:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-07-13 18:11:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 18:11:32,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:32,895 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:11:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-13 18:11:33,111 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,SelfDestructingSolverStorable24 [2022-07-13 18:11:33,111 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2022-07-13 18:11:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:33,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534477380] [2022-07-13 18:11:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:33,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:34,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-07-13 18:11:35,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534477380] [2022-07-13 18:11:35,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534477380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:11:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874632287] [2022-07-13 18:11:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:11:35,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:11:35,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:11:35,966 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) [2022-07-13 18:11:35,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 18:11:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-13 18:11:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:11:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-07-13 18:11:41,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:11:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-07-13 18:11:44,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874632287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:11:44,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:11:44,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 55 [2022-07-13 18:11:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237281429] [2022-07-13 18:11:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:11:44,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-13 18:11:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-13 18:11:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 18:11:44,334 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2022-07-13 18:11:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:45,254 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-07-13 18:11:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 18:11:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) Word has length 160 [2022-07-13 18:11:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:45,255 INFO L225 Difference]: With dead ends: 94 [2022-07-13 18:11:45,255 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 18:11:45,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 367 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 18:11:45,256 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:45,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1941 Invalid, 2734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2734 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 18:11:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 18:11:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-13 18:11:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 61 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2022-07-13 18:11:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-07-13 18:11:45,263 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2022-07-13 18:11:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:45,263 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-07-13 18:11:45,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2022-07-13 18:11:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-07-13 18:11:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-13 18:11:45,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:45,269 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:11:45,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 18:11:45,483 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,SelfDestructingSolverStorable25 [2022-07-13 18:11:45,483 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2022-07-13 18:11:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:45,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109179662] [2022-07-13 18:11:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:45,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:45,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:45,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:45,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:45,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:11:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-07-13 18:11:46,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:46,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109179662] [2022-07-13 18:11:46,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109179662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:11:46,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368651599] [2022-07-13 18:11:46,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:11:46,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:11:46,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:11:46,671 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) [2022-07-13 18:11:46,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 18:11:51,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:11:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:11:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 18:11:51,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:11:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-07-13 18:11:51,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:11:51,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368651599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:51,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:11:51,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2022-07-13 18:11:51,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291019208] [2022-07-13 18:11:51,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:51,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 18:11:51,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 18:11:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 18:11:51,769 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2022-07-13 18:11:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:52,252 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2022-07-13 18:11:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 18:11:52,253 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) Word has length 166 [2022-07-13 18:11:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:52,253 INFO L225 Difference]: With dead ends: 90 [2022-07-13 18:11:52,253 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 18:11:52,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2022-07-13 18:11:52,254 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:52,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 261 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:11:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 18:11:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 18:11:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 18:11:52,255 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2022-07-13 18:11:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:52,255 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 18:11:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2022-07-13 18:11:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 18:11:52,255 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 18:11:52,257 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 18:11:52,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 18:11:52,469 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,SelfDestructingSolverStorable26 [2022-07-13 18:11:52,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 18:11:52,481 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2022-07-13 18:11:52,482 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 25 |ULTIMATE.start_main_~input~0#1|) (<= |ULTIMATE.start_main_~input~0#1| 25)) [2022-07-13 18:11:52,482 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-07-13 18:11:52,483 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2022-07-13 18:11:52,483 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2022-07-13 18:11:52,483 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2022-07-13 18:11:52,483 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2022-07-13 18:11:52,483 INFO L902 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2022-07-13 18:11:52,483 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-07-13 18:11:52,483 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2022-07-13 18:11:52,499 INFO L356 BasicCegarLoop]: Path program histogram: [26, 1] [2022-07-13 18:11:52,502 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 18:11:52,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:11:52 BoogieIcfgContainer [2022-07-13 18:11:52,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 18:11:52,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 18:11:52,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 18:11:52,517 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 18:11:52,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:07:22" (3/4) ... [2022-07-13 18:11:52,520 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 18:11:52,524 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2022-07-13 18:11:52,541 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-13 18:11:52,541 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-13 18:11:52,541 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 18:11:52,541 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 18:11:52,569 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 18:11:52,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 18:11:52,574 INFO L158 Benchmark]: Toolchain (without parser) took 270518.75ms. Allocated memory was 98.6MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 58.4MB in the beginning and 1.1GB in the end (delta: -995.5MB). Peak memory consumption was 472.9MB. Max. memory is 16.1GB. [2022-07-13 18:11:52,574 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 18:11:52,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.83ms. Allocated memory is still 98.6MB. Free memory was 58.2MB in the beginning and 73.6MB in the end (delta: -15.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 18:11:52,574 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.36ms. Allocated memory is still 98.6MB. Free memory was 73.6MB in the beginning and 72.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 18:11:52,574 INFO L158 Benchmark]: Boogie Preprocessor took 13.08ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 71.2MB in the end (delta: 922.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 18:11:52,576 INFO L158 Benchmark]: RCFGBuilder took 197.17ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 62.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 18:11:52,578 INFO L158 Benchmark]: TraceAbstraction took 270054.66ms. Allocated memory was 98.6MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 61.9MB in the beginning and 1.1GB in the end (delta: -994.1MB). Peak memory consumption was 475.2MB. Max. memory is 16.1GB. [2022-07-13 18:11:52,579 INFO L158 Benchmark]: Witness Printer took 55.86ms. Allocated memory is still 1.6GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 18:11:52,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.83ms. Allocated memory is still 98.6MB. Free memory was 58.2MB in the beginning and 73.6MB in the end (delta: -15.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.36ms. Allocated memory is still 98.6MB. Free memory was 73.6MB in the beginning and 72.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.08ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 71.2MB in the end (delta: 922.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 197.17ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 62.5MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 270054.66ms. Allocated memory was 98.6MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 61.9MB in the beginning and 1.1GB in the end (delta: -994.1MB). Peak memory consumption was 475.2MB. Max. memory is 16.1GB. * Witness Printer took 55.86ms. Allocated memory is still 1.6GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 270.0s, OverallIterations: 27, TraceHistogramMax: 27, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5417 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5041 mSDsluCounter, 5120 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4747 mSDsCounter, 2216 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4766 IncrementalHoareTripleChecker+Invalid, 6982 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2216 mSolverCounterUnsat, 373 mSDtfsCounter, 4766 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6108 GetRequests, 4895 SyntacticMatches, 7 SemanticMatches, 1206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17245 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=26, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 225.1s InterpolantComputationTime, 4742 NumberOfCodeBlocks, 4742 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 6864 ConstructedInterpolants, 0 QuantifiedInterpolants, 20890 SizeOfPredicates, 352 NumberOfNonLiveVariables, 6110 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 78 InterpolantComputations, 2 PerfectInterpolantSequences, 24506/54808 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-13 18:11:52,823 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-07-13 18:11:52,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE