./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:18:50,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:18:50,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:18:50,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:18:50,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:18:50,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:18:50,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:18:50,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:18:50,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:18:50,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:18:50,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:18:50,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:18:50,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:18:50,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:18:50,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:18:50,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:18:50,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:18:50,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:18:50,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:18:51,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:18:51,004 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:18:51,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:18:51,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:18:51,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:18:51,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:18:51,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:18:51,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:18:51,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:18:51,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:18:51,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:18:51,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:18:51,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:18:51,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:18:51,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:18:51,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:18:51,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:18:51,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:18:51,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:18:51,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:18:51,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:18:51,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:18:51,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:18:51,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:18:51,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:18:51,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:18:51,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:18:51,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:18:51,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:18:51,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:18:51,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:18:51,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:18:51,058 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:18:51,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:18:51,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:18:51,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:18:51,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:18:51,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:18:51,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:18:51,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:18:51,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:18:51,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:18:51,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:18:51,062 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:18:51,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:18:51,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:18:51,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:18:51,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:18:51,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:18:51,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:18:51,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:18:51,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:18:51,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:18:51,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:18:51,065 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:18:51,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:18:51,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:18:51,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-07-19 10:18:51,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:18:51,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:18:51,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:18:51,334 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:18:51,335 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:18:51,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-07-19 10:18:51,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70ee31d8/caf578059f664380bd9bdea934ef4ca0/FLAGa8c0d588b [2022-07-19 10:18:51,776 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:18:51,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-07-19 10:18:51,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70ee31d8/caf578059f664380bd9bdea934ef4ca0/FLAGa8c0d588b [2022-07-19 10:18:51,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70ee31d8/caf578059f664380bd9bdea934ef4ca0 [2022-07-19 10:18:51,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:18:51,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:18:51,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:18:51,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:18:51,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:18:51,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:18:51" (1/1) ... [2022-07-19 10:18:51,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1efe708f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:51, skipping insertion in model container [2022-07-19 10:18:51,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:18:51" (1/1) ... [2022-07-19 10:18:51,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:18:51,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:18:52,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-07-19 10:18:52,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:18:52,038 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:18:52,055 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-07-19 10:18:52,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:18:52,086 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:18:52,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52 WrapperNode [2022-07-19 10:18:52,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:18:52,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:18:52,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:18:52,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:18:52,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,131 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-19 10:18:52,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:18:52,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:18:52,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:18:52,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:18:52,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:18:52,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:18:52,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:18:52,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:18:52,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (1/1) ... [2022-07-19 10:18:52,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:18:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:52,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:18:52,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:18:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:18:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 10:18:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 10:18:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:18:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:18:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:18:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:18:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:18:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:18:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:18:52,305 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:18:52,307 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:18:52,518 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:18:52,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:18:52,523 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 10:18:52,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:18:52 BoogieIcfgContainer [2022-07-19 10:18:52,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:18:52,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:18:52,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:18:52,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:18:52,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:18:51" (1/3) ... [2022-07-19 10:18:52,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e035bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:18:52, skipping insertion in model container [2022-07-19 10:18:52,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:18:52" (2/3) ... [2022-07-19 10:18:52,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e035bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:18:52, skipping insertion in model container [2022-07-19 10:18:52,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:18:52" (3/3) ... [2022-07-19 10:18:52,533 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-07-19 10:18:52,546 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:18:52,547 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:18:52,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:18:52,598 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@5d72fc72, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ea2fdb7 [2022-07-19 10:18:52,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:18:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:18:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:18:52,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:52,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:52,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2022-07-19 10:18:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:52,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360729415] [2022-07-19 10:18:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:52,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:18:52,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360729415] [2022-07-19 10:18:52,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360729415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:18:52,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:18:52,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:18:52,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418701188] [2022-07-19 10:18:52,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:18:52,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:18:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:18:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:18:52,972 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:18:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:53,018 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2022-07-19 10:18:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:18:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 22 [2022-07-19 10:18:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:53,027 INFO L225 Difference]: With dead ends: 64 [2022-07-19 10:18:53,028 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 10:18:53,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:18:53,034 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:53,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:18:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 10:18:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 10:18:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:18:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-19 10:18:53,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2022-07-19 10:18:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:53,070 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-19 10:18:53,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:18:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-19 10:18:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:18:53,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:53,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:53,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:18:53,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2022-07-19 10:18:53,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:53,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746794267] [2022-07-19 10:18:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:18:53,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:53,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746794267] [2022-07-19 10:18:53,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746794267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:18:53,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:18:53,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:18:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865739077] [2022-07-19 10:18:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:18:53,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:18:53,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:18:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:18:53,154 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:18:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:53,227 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-07-19 10:18:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:18:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-19 10:18:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:53,229 INFO L225 Difference]: With dead ends: 50 [2022-07-19 10:18:53,229 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 10:18:53,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:18:53,231 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:53,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:18:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 10:18:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-19 10:18:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:18:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-19 10:18:53,239 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-07-19 10:18:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:53,239 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-19 10:18:53,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:18:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-19 10:18:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 10:18:53,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:53,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:53,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:18:53,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2022-07-19 10:18:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63513103] [2022-07-19 10:18:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:53,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:18:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:18:53,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63513103] [2022-07-19 10:18:53,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63513103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925951176] [2022-07-19 10:18:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:53,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:53,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:53,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:18:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 10:18:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:53,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 10:18:54,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 10:18:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:18:54,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:56,260 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:18:56,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-07-19 10:18:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:18:56,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925951176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:56,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:56,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-07-19 10:18:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191684331] [2022-07-19 10:18:56,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:56,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 10:18:56,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 10:18:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2022-07-19 10:18:56,338 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:18:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:56,569 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-19 10:18:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:18:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-07-19 10:18:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:56,575 INFO L225 Difference]: With dead ends: 54 [2022-07-19 10:18:56,575 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 10:18:56,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2022-07-19 10:18:56,581 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:56,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 159 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 198 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-07-19 10:18:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 10:18:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-19 10:18:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 10:18:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-19 10:18:56,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-07-19 10:18:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:56,598 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-19 10:18:56,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:18:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-19 10:18:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 10:18:56,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:56,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:56,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:56,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:56,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2022-07-19 10:18:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:56,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577922624] [2022-07-19 10:18:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:18:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:18:57,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577922624] [2022-07-19 10:18:57,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577922624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941147089] [2022-07-19 10:18:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:57,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:57,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:57,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:57,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:18:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:57,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 10:18:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:57,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 10:18:57,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 10:18:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:18:57,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:59,626 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:18:59,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-07-19 10:18:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:18:59,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941147089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:59,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:59,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-07-19 10:18:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754159611] [2022-07-19 10:18:59,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:59,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:18:59,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:18:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2022-07-19 10:18:59,673 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:18:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:59,916 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-07-19 10:18:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:18:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-07-19 10:18:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:59,920 INFO L225 Difference]: With dead ends: 68 [2022-07-19 10:18:59,920 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 10:18:59,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-07-19 10:18:59,921 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:59,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 266 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-07-19 10:18:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 10:18:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-07-19 10:18:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 10:18:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-19 10:18:59,929 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-07-19 10:18:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:59,930 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-19 10:18:59,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:18:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-19 10:18:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:18:59,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:59,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:59,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:00,147 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,SelfDestructingSolverStorable3 [2022-07-19 10:19:00,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2022-07-19 10:19:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485936992] [2022-07-19 10:19:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:00,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 10:19:00,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485936992] [2022-07-19 10:19:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485936992] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:00,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352763060] [2022-07-19 10:19:00,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:00,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:00,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:00,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:00,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:19:00,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:19:00,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:19:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 10:19:00,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 10:19:00,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352763060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:00,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:00,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 10:19:00,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809509853] [2022-07-19 10:19:00,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:00,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:19:00,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:19:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:19:00,389 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:19:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:00,508 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2022-07-19 10:19:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:19:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-19 10:19:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:00,509 INFO L225 Difference]: With dead ends: 88 [2022-07-19 10:19:00,509 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 10:19:00,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:19:00,511 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:00,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 100 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:19:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 10:19:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-07-19 10:19:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 10:19:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-19 10:19:00,518 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2022-07-19 10:19:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:00,519 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-19 10:19:00,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:19:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-19 10:19:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:19:00,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:00,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:00,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:00,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:00,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2022-07-19 10:19:00,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:00,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141137679] [2022-07-19 10:19:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:00,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 10:19:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:00,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141137679] [2022-07-19 10:19:00,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141137679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:00,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340338111] [2022-07-19 10:19:00,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:19:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:00,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:00,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:00,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:19:00,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 10:19:00,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:19:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 10:19:00,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 10:19:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340338111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:00,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:00,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 10:19:00,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398980455] [2022-07-19 10:19:00,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:00,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:19:00,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:19:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:19:00,996 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 10:19:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:01,116 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-07-19 10:19:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:19:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-07-19 10:19:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:01,120 INFO L225 Difference]: With dead ends: 59 [2022-07-19 10:19:01,120 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 10:19:01,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:19:01,121 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:01,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 119 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:19:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 10:19:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-07-19 10:19:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 10:19:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-19 10:19:01,127 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2022-07-19 10:19:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:01,127 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-19 10:19:01,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 10:19:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-07-19 10:19:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:19:01,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:01,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:01,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:01,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:01,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2022-07-19 10:19:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:01,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313677060] [2022-07-19 10:19:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:02,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313677060] [2022-07-19 10:19:02,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313677060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592773003] [2022-07-19 10:19:02,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:19:02,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:02,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:02,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:02,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:19:02,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:19:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 10:19:02,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:02,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-19 10:19:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:02,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:19:02,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-19 10:19:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:02,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2022-07-19 10:19:02,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2022-07-19 10:19:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:02,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:13,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592773003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:13,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:13,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2022-07-19 10:19:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106328261] [2022-07-19 10:19:13,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:13,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 10:19:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 10:19:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1702, Unknown=5, NotChecked=0, Total=1892 [2022-07-19 10:19:13,994 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:15,811 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2022-07-19 10:19:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 10:19:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-19 10:19:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:15,812 INFO L225 Difference]: With dead ends: 95 [2022-07-19 10:19:15,812 INFO L226 Difference]: Without dead ends: 91 [2022-07-19 10:19:15,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=569, Invalid=4256, Unknown=5, NotChecked=0, Total=4830 [2022-07-19 10:19:15,814 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:15,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 359 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 790 Invalid, 0 Unknown, 203 Unchecked, 0.5s Time] [2022-07-19 10:19:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-19 10:19:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-07-19 10:19:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:19:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-19 10:19:15,826 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-07-19 10:19:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:15,826 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-19 10:19:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-19 10:19:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:19:15,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:15,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:15,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:16,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:16,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2022-07-19 10:19:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:16,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561048343] [2022-07-19 10:19:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:16,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:16,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:16,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:16,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561048343] [2022-07-19 10:19:16,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561048343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967380223] [2022-07-19 10:19:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:16,703 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) [2022-07-19 10:19:16,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:19:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 10:19:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:16,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:19:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:17,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:19:17,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-07-19 10:19:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:17,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-07-19 10:19:17,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-19 10:19:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:25,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967380223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:25,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:25,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-07-19 10:19:25,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69107801] [2022-07-19 10:19:25,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:25,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 10:19:25,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 10:19:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1768, Unknown=3, NotChecked=0, Total=1980 [2022-07-19 10:19:25,528 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:26,679 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2022-07-19 10:19:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:19:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-19 10:19:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:26,681 INFO L225 Difference]: With dead ends: 93 [2022-07-19 10:19:26,681 INFO L226 Difference]: Without dead ends: 89 [2022-07-19 10:19:26,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=427, Invalid=2992, Unknown=3, NotChecked=0, Total=3422 [2022-07-19 10:19:26,682 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 67 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:26,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 297 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 665 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-07-19 10:19:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-19 10:19:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2022-07-19 10:19:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:19:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-19 10:19:26,696 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-07-19 10:19:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:26,696 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-19 10:19:26,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-19 10:19:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:19:26,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:26,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:26,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:26,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:26,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2022-07-19 10:19:26,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751441511] [2022-07-19 10:19:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:27,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:27,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:27,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:27,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751441511] [2022-07-19 10:19:27,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751441511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403340615] [2022-07-19 10:19:27,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:27,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:27,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:27,578 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) [2022-07-19 10:19:27,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:19:27,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:19:27,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 10:19:27,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:27,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:19:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:27,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:19:27,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-19 10:19:28,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:28,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2022-07-19 10:19:28,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2022-07-19 10:19:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:28,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:37,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403340615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:37,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:37,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2022-07-19 10:19:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478508960] [2022-07-19 10:19:37,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 10:19:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 10:19:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1863, Unknown=4, NotChecked=0, Total=2070 [2022-07-19 10:19:37,468 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:38,881 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2022-07-19 10:19:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 10:19:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-19 10:19:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:38,882 INFO L225 Difference]: With dead ends: 150 [2022-07-19 10:19:38,882 INFO L226 Difference]: Without dead ends: 146 [2022-07-19 10:19:38,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=542, Invalid=3876, Unknown=4, NotChecked=0, Total=4422 [2022-07-19 10:19:38,884 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:38,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 253 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 630 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-07-19 10:19:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-19 10:19:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 72. [2022-07-19 10:19:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-07-19 10:19:38,903 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2022-07-19 10:19:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:38,904 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-07-19 10:19:38,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-07-19 10:19:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:19:38,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:38,905 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:38,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:39,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:39,105 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2022-07-19 10:19:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991390301] [2022-07-19 10:19:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:39,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:39,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991390301] [2022-07-19 10:19:39,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991390301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144900979] [2022-07-19 10:19:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:39,673 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) [2022-07-19 10:19:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:19:39,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:19:39,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:39,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 10:19:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:39,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:19:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:40,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:40,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:19:40,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-07-19 10:19:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:40,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-07-19 10:19:40,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-19 10:19:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:40,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:52,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144900979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:52,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:52,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2022-07-19 10:19:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644810444] [2022-07-19 10:19:52,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:52,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 10:19:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 10:19:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1943, Unknown=6, NotChecked=0, Total=2162 [2022-07-19 10:19:52,948 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:54,098 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-07-19 10:19:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:19:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-19 10:19:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:54,099 INFO L225 Difference]: With dead ends: 116 [2022-07-19 10:19:54,099 INFO L226 Difference]: Without dead ends: 112 [2022-07-19 10:19:54,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=441, Invalid=3335, Unknown=6, NotChecked=0, Total=3782 [2022-07-19 10:19:54,101 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:54,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 346 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 664 Invalid, 0 Unknown, 180 Unchecked, 0.4s Time] [2022-07-19 10:19:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-19 10:19:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2022-07-19 10:19:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:19:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2022-07-19 10:19:54,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 50 [2022-07-19 10:19:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:54,112 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2022-07-19 10:19:54,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:19:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2022-07-19 10:19:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:19:54,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:54,113 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:54,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:54,337 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,SelfDestructingSolverStorable9 [2022-07-19 10:19:54,337 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2022-07-19 10:19:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896607390] [2022-07-19 10:19:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:54,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:54,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:54,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 10:19:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896607390] [2022-07-19 10:19:54,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896607390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:54,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722797021] [2022-07-19 10:19:54,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:19:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:54,431 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) [2022-07-19 10:19:54,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:19:54,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 10:19:54,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:19:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 10:19:54,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 10:19:54,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722797021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:54,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:54,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 10:19:54,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317634631] [2022-07-19 10:19:54,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:19:54,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:54,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:19:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:19:54,624 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 10:19:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:54,765 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2022-07-19 10:19:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:19:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2022-07-19 10:19:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:54,766 INFO L225 Difference]: With dead ends: 121 [2022-07-19 10:19:54,766 INFO L226 Difference]: Without dead ends: 85 [2022-07-19 10:19:54,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:19:54,767 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:54,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 121 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:19:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-19 10:19:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2022-07-19 10:19:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:19:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-07-19 10:19:54,776 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 52 [2022-07-19 10:19:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:54,777 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-07-19 10:19:54,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 10:19:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-07-19 10:19:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 10:19:54,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:54,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:54,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:54,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:54,984 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2022-07-19 10:19:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:54,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471313723] [2022-07-19 10:19:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:54,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:55,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:55,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:55,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:19:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 10:19:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471313723] [2022-07-19 10:19:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471313723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800094086] [2022-07-19 10:19:55,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:19:55,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:55,076 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) [2022-07-19 10:19:55,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:19:55,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 10:19:55,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:19:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 10:19:55,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 10:19:55,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800094086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:55,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:55,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 10:19:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575543826] [2022-07-19 10:19:55,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:55,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:19:55,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:19:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:19:55,263 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 10:19:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:55,424 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-07-19 10:19:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:19:55,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-07-19 10:19:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:55,425 INFO L225 Difference]: With dead ends: 73 [2022-07-19 10:19:55,425 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 10:19:55,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:19:55,426 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:55,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 132 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:19:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 10:19:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-07-19 10:19:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 10:19:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-19 10:19:55,432 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2022-07-19 10:19:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-19 10:19:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 10:19:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-19 10:19:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:19:55,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:55,434 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:55,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 10:19:55,635 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,SelfDestructingSolverStorable11 [2022-07-19 10:19:55,635 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2022-07-19 10:19:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952688348] [2022-07-19 10:19:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:19:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:19:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:19:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:19:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952688348] [2022-07-19 10:19:56,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952688348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538632961] [2022-07-19 10:19:56,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:19:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:56,385 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) [2022-07-19 10:19:56,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:19:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 10:19:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:56,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:19:57,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:19:57,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-07-19 10:19:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:19:57,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2022-07-19 10:19:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:19:57,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-07-19 10:19:57,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2022-07-19 10:19:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:19:58,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:13,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538632961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:13,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:20:13,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2022-07-19 10:20:13,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299121354] [2022-07-19 10:20:13,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:13,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 10:20:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 10:20:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3451, Unknown=6, NotChecked=0, Total=3782 [2022-07-19 10:20:13,854 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:20:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:15,734 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-07-19 10:20:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 10:20:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-19 10:20:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:15,737 INFO L225 Difference]: With dead ends: 111 [2022-07-19 10:20:15,737 INFO L226 Difference]: Without dead ends: 107 [2022-07-19 10:20:15,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=665, Invalid=6301, Unknown=6, NotChecked=0, Total=6972 [2022-07-19 10:20:15,739 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:15,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 475 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 991 Invalid, 0 Unknown, 142 Unchecked, 0.6s Time] [2022-07-19 10:20:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-19 10:20:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-07-19 10:20:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 10:20:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-07-19 10:20:15,752 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 64 [2022-07-19 10:20:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:15,753 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-07-19 10:20:15,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:20:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-07-19 10:20:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:20:15,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:15,756 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:15,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:15,973 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,SelfDestructingSolverStorable12 [2022-07-19 10:20:15,974 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2022-07-19 10:20:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:15,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128721367] [2022-07-19 10:20:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:20:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:20:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:20:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:20:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128721367] [2022-07-19 10:20:16,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128721367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813087488] [2022-07-19 10:20:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:20:16,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:16,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:16,835 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) [2022-07-19 10:20:16,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:20:16,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 10:20:16,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:16,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 10:20:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:16,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:20:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:17,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:20:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:17,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-07-19 10:20:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-07-19 10:20:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:18,215 INFO L356 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2022-07-19 10:20:18,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 103 [2022-07-19 10:20:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:20:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:20:19,218 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:20:19,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 70 [2022-07-19 10:20:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:20:19,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:21:12,341 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 Int) (v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse3) v_ArrVal_257)) (.cse2 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (<= 0 (let ((.cse0 (store .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2) v_ArrVal_258))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~k~0#1| 1))) (not (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse1) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse2)) (+ v_ArrVal_258 |c_ULTIMATE.start_main_~j~0#1|))) (not (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#a~0#1.offset|)) (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|))) (not (< |v_ULTIMATE.start_main_~i~0#1_148| |c_ULTIMATE.start_main_~N~0#1|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (not (< |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~N~0#1|)))))) is different from false [2022-07-19 10:21:14,378 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 Int) (v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse0 4) v_ArrVal_257)) (.cse2 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (not (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset| 4)) (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|))) (not (< |v_ULTIMATE.start_main_~i~0#1_148| |c_ULTIMATE.start_main_~N~0#1|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (not (< |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~N~0#1|)) (not (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse1) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse2)) (+ v_ArrVal_258 |c_ULTIMATE.start_main_~j~0#1|))) (<= 0 (let ((.cse3 (store .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2) v_ArrVal_258))) (+ (select .cse3 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) (select .cse3 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|) |c_ULTIMATE.start_main_~k~0#1| 1))))))) is different from false [2022-07-19 10:22:20,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813087488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:20,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:22:20,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30] total 53 [2022-07-19 10:22:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387772872] [2022-07-19 10:22:20,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:22:20,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 10:22:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:22:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 10:22:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=4196, Unknown=42, NotChecked=270, Total=4970 [2022-07-19 10:22:20,215 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:22:26,664 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-07-19 10:22:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 10:22:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-19 10:22:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:22:26,665 INFO L225 Difference]: With dead ends: 152 [2022-07-19 10:22:26,666 INFO L226 Difference]: Without dead ends: 148 [2022-07-19 10:22:26,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3163 ImplicationChecksByTransitivity, 127.9s TimeCoverageRelationStatistics Valid=951, Invalid=8519, Unknown=44, NotChecked=386, Total=9900 [2022-07-19 10:22:26,668 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:22:26,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 501 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 913 Invalid, 0 Unknown, 662 Unchecked, 0.5s Time] [2022-07-19 10:22:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-19 10:22:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 92. [2022-07-19 10:22:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2022-07-19 10:22:26,681 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 64 [2022-07-19 10:22:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:22:26,681 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2022-07-19 10:22:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2022-07-19 10:22:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:22:26,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:22:26,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:22:26,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 10:22:26,883 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,SelfDestructingSolverStorable13 [2022-07-19 10:22:26,883 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:22:26,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:22:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2022-07-19 10:22:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:22:26,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846387501] [2022-07-19 10:22:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:22:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:22:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:27,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:22:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:22:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:27,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:22:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:27,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:22:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:22:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:22:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:22:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846387501] [2022-07-19 10:22:27,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846387501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760230553] [2022-07-19 10:22:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:22:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:22:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:22:27,631 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) [2022-07-19 10:22:27,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:22:27,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:22:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:22:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 10:22:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:22:27,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-19 10:22:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:22:28,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-07-19 10:22:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:22:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2022-07-19 10:22:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:28,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-07-19 10:22:29,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2022-07-19 10:22:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 10:22:29,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:22:35,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760230553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:35,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:22:35,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2022-07-19 10:22:35,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114783531] [2022-07-19 10:22:35,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:22:35,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 10:22:35,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:22:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 10:22:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3593, Unknown=2, NotChecked=0, Total=3906 [2022-07-19 10:22:35,996 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:22:37,847 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2022-07-19 10:22:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 10:22:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-19 10:22:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:22:37,848 INFO L225 Difference]: With dead ends: 127 [2022-07-19 10:22:37,848 INFO L226 Difference]: Without dead ends: 123 [2022-07-19 10:22:37,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=556, Invalid=5604, Unknown=2, NotChecked=0, Total=6162 [2022-07-19 10:22:37,851 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:22:37,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 444 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1452 Invalid, 0 Unknown, 260 Unchecked, 0.8s Time] [2022-07-19 10:22:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-19 10:22:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-07-19 10:22:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 10:22:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-19 10:22:37,867 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2022-07-19 10:22:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:22:37,868 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-19 10:22:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-19 10:22:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:22:37,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:22:37,869 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:22:37,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:22:38,069 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,SelfDestructingSolverStorable14 [2022-07-19 10:22:38,070 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:22:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:22:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2022-07-19 10:22:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:22:38,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533955795] [2022-07-19 10:22:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:22:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:22:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:38,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:22:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:22:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:38,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:22:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:22:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:38,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:22:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:22:38,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:22:38,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533955795] [2022-07-19 10:22:38,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533955795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:38,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194767434] [2022-07-19 10:22:38,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:22:38,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:22:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:22:38,824 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) [2022-07-19 10:22:38,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:22:38,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:22:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:22:38,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 10:22:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:22:38,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-19 10:22:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:22:39,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2022-07-19 10:22:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:22:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2022-07-19 10:22:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:22:39,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-07-19 10:22:40,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-07-19 10:22:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:22:40,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:22:57,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194767434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:57,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:22:57,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 47 [2022-07-19 10:22:57,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477839142] [2022-07-19 10:22:57,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:22:57,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 10:22:57,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:22:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 10:22:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3341, Unknown=8, NotChecked=0, Total=3660 [2022-07-19 10:22:57,683 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:22:59,358 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-07-19 10:22:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 10:22:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-19 10:22:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:22:59,359 INFO L225 Difference]: With dead ends: 126 [2022-07-19 10:22:59,359 INFO L226 Difference]: Without dead ends: 122 [2022-07-19 10:22:59,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=529, Invalid=5163, Unknown=8, NotChecked=0, Total=5700 [2022-07-19 10:22:59,360 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 71 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:22:59,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 509 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1348 Invalid, 0 Unknown, 200 Unchecked, 0.7s Time] [2022-07-19 10:22:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-19 10:22:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2022-07-19 10:22:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 10:22:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-19 10:22:59,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2022-07-19 10:22:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:22:59,381 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-19 10:22:59,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:22:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-19 10:22:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:22:59,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:22:59,382 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:22:59,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 10:22:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:22:59,583 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:22:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:22:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2022-07-19 10:22:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:22:59,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462908399] [2022-07-19 10:22:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:22:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:22:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:23:00,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:23:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:23:00,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:23:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:23:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:23:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:23:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:23:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:23:00,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:23:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:23:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:23:00,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:23:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462908399] [2022-07-19 10:23:00,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462908399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:23:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414266471] [2022-07-19 10:23:00,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:23:00,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:23:00,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:23:00,396 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) [2022-07-19 10:23:00,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 10:23:00,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 10:23:00,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:23:00,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-19 10:23:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:23:00,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 10:23:08,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:08,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:23:08,641 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-07-19 10:23:08,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 60 [2022-07-19 10:23:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:08,817 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-07-19 10:23:08,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 79 [2022-07-19 10:23:09,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,044 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-07-19 10:23:09,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 92 [2022-07-19 10:23:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:23:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:23:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:23:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:23:09,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:23:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:23:09,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 31 [2022-07-19 10:23:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 10:23:10,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:23:13,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414266471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:23:13,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:23:13,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2022-07-19 10:23:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155532957] [2022-07-19 10:23:13,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:23:13,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 10:23:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:23:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 10:23:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=5017, Unknown=6, NotChecked=0, Total=5700 [2022-07-19 10:23:13,750 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:23:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:23:21,724 INFO L93 Difference]: Finished difference Result 190 states and 245 transitions. [2022-07-19 10:23:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-19 10:23:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-19 10:23:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:23:21,726 INFO L225 Difference]: With dead ends: 190 [2022-07-19 10:23:21,726 INFO L226 Difference]: Without dead ends: 186 [2022-07-19 10:23:21,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3533 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1137, Invalid=8953, Unknown=10, NotChecked=0, Total=10100 [2022-07-19 10:23:21,728 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:23:21,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 267 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 675 Invalid, 0 Unknown, 183 Unchecked, 0.4s Time] [2022-07-19 10:23:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-19 10:23:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2022-07-19 10:23:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 101 states have (on average 1.2871287128712872) internal successors, (130), 101 states have internal predecessors, (130), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 10:23:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2022-07-19 10:23:21,752 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 64 [2022-07-19 10:23:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:23:21,752 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2022-07-19 10:23:21,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:23:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2022-07-19 10:23:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:23:21,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:23:21,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:23:21,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 10:23:21,959 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,SelfDestructingSolverStorable16 [2022-07-19 10:23:21,960 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:23:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:23:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2022-07-19 10:23:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:23:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153784831] [2022-07-19 10:23:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:23:21,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:23:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat