./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:55:03,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:55:03,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:55:03,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:55:03,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:55:03,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:55:03,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:55:03,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:55:03,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:55:03,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:55:03,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:55:03,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:55:03,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:55:03,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:55:03,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:55:03,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:55:03,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:55:03,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:55:03,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:55:03,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:55:03,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:55:03,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:55:03,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:55:03,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:55:03,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:55:03,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:55:03,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:55:03,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:55:03,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:55:03,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:55:03,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:55:03,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:55:03,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:55:03,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:55:03,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:55:03,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:55:03,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:55:03,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:55:03,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:55:03,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:55:03,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:55:03,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:55:03,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:55:03,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:55:03,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:55:03,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:55:03,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:55:03,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:55:03,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:55:03,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:55:03,264 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:55:03,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:55:03,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:55:03,265 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:55:03,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:55:03,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:55:03,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:55:03,265 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:55:03,266 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:55:03,266 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:55:03,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:55:03,266 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:55:03,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:55:03,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:55:03,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:55:03,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:55:03,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:55:03,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:55:03,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:55:03,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:55:03,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:55:03,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:55:03,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:55:03,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2021-12-16 05:55:03,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:55:03,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:55:03,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:55:03,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:55:03,518 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:55:03,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-12-16 05:55:03,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4961f4b/2e9cb693cb414cf7bb1d61ce7aa79ee7/FLAG571004c7e [2021-12-16 05:55:04,046 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:55:04,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-12-16 05:55:04,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4961f4b/2e9cb693cb414cf7bb1d61ce7aa79ee7/FLAG571004c7e [2021-12-16 05:55:04,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4961f4b/2e9cb693cb414cf7bb1d61ce7aa79ee7 [2021-12-16 05:55:04,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:55:04,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:55:04,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:55:04,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:55:04,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:55:04,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6ecc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04, skipping insertion in model container [2021-12-16 05:55:04,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:55:04,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:55:04,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:55:04,652 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:55:04,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:55:04,672 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:55:04,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04 WrapperNode [2021-12-16 05:55:04,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:55:04,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:55:04,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:55:04,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:55:04,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,703 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-16 05:55:04,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:55:04,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:55:04,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:55:04,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:55:04,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:55:04,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:55:04,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:55:04,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:55:04,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (1/1) ... [2021-12-16 05:55:04,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:55:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:04,756 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) [2021-12-16 05:55:04,766 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 [2021-12-16 05:55:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:55:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:55:04,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:55:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:55:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:55:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:55:04,849 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:55:04,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:55:05,016 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:55:05,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:55:05,021 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 05:55:05,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:55:05 BoogieIcfgContainer [2021-12-16 05:55:05,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:55:05,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:55:05,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:55:05,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:55:05,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:55:04" (1/3) ... [2021-12-16 05:55:05,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e4519c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:55:05, skipping insertion in model container [2021-12-16 05:55:05,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:55:04" (2/3) ... [2021-12-16 05:55:05,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e4519c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:55:05, skipping insertion in model container [2021-12-16 05:55:05,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:55:05" (3/3) ... [2021-12-16 05:55:05,045 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2021-12-16 05:55:05,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:55:05,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-16 05:55:05,108 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:55:05,113 INFO L339 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 05:55:05,113 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-16 05:55:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 05:55:05,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:05,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 05:55:05,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-16 05:55:05,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:05,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804785976] [2021-12-16 05:55:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:05,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:05,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:05,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804785976] [2021-12-16 05:55:05,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804785976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:05,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:05,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:55:05,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803667486] [2021-12-16 05:55:05,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:05,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:55:05,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:55:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:05,395 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:05,454 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-16 05:55:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:55:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-16 05:55:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:05,463 INFO L225 Difference]: With dead ends: 59 [2021-12-16 05:55:05,463 INFO L226 Difference]: Without dead ends: 55 [2021-12-16 05:55:05,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:05,471 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:05,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-16 05:55:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-12-16 05:55:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-16 05:55:05,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-12-16 05:55:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-16 05:55:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-16 05:55:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:55:05,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:05,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:55:05,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:55:05,506 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-12-16 05:55:05,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:05,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736212685] [2021-12-16 05:55:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:05,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:05,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:05,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736212685] [2021-12-16 05:55:05,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736212685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:05,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:05,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:55:05,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091656780] [2021-12-16 05:55:05,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:05,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:55:05,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:55:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:05,571 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:05,606 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-16 05:55:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:55:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:55:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:05,608 INFO L225 Difference]: With dead ends: 58 [2021-12-16 05:55:05,608 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 05:55:05,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:05,613 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:05,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 05:55:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-16 05:55:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-16 05:55:05,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-16 05:55:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-16 05:55:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-16 05:55:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:55:05,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:05,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:55:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:55:05,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-12-16 05:55:05,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826338476] [2021-12-16 05:55:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:05,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:05,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826338476] [2021-12-16 05:55:05,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826338476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:05,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:05,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:55:05,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534065992] [2021-12-16 05:55:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:05,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:55:05,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:55:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:55:05,690 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:05,734 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-16 05:55:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:55:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:55:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:05,736 INFO L225 Difference]: With dead ends: 32 [2021-12-16 05:55:05,737 INFO L226 Difference]: Without dead ends: 32 [2021-12-16 05:55:05,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:55:05,738 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:05,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-16 05:55:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-16 05:55:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-16 05:55:05,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-16 05:55:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:05,749 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-16 05:55:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-16 05:55:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:55:05,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:05,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:55:05,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:55:05,753 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-12-16 05:55:05,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:05,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509372995] [2021-12-16 05:55:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:05,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:05,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:05,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509372995] [2021-12-16 05:55:05,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509372995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:05,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:05,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:55:05,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657504624] [2021-12-16 05:55:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:55:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:55:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:55:05,852 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:05,918 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-16 05:55:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:55:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:55:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:05,919 INFO L225 Difference]: With dead ends: 55 [2021-12-16 05:55:05,919 INFO L226 Difference]: Without dead ends: 55 [2021-12-16 05:55:05,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:55:05,921 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:05,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-16 05:55:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-16 05:55:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-16 05:55:05,924 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-16 05:55:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:05,924 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-16 05:55:05,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-16 05:55:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:55:05,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:05,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:05,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:55:05,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-16 05:55:05,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:05,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043572425] [2021-12-16 05:55:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:05,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:05,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043572425] [2021-12-16 05:55:05,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043572425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:05,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:05,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:55:05,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842330481] [2021-12-16 05:55:05,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:05,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:55:05,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:05,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:55:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:55:05,962 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:05,975 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-12-16 05:55:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:55:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:55:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:05,976 INFO L225 Difference]: With dead ends: 31 [2021-12-16 05:55:05,976 INFO L226 Difference]: Without dead ends: 31 [2021-12-16 05:55:05,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:55:05,977 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:05,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-16 05:55:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-16 05:55:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-16 05:55:05,980 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2021-12-16 05:55:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:05,980 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-16 05:55:05,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-16 05:55:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:55:05,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:05,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:05,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:55:05,981 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2021-12-16 05:55:05,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:05,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405395969] [2021-12-16 05:55:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:05,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405395969] [2021-12-16 05:55:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405395969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:06,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:06,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:55:06,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498297209] [2021-12-16 05:55:06,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:06,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:55:06,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:55:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:06,020 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:06,035 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-16 05:55:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:55:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:55:06,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:06,036 INFO L225 Difference]: With dead ends: 33 [2021-12-16 05:55:06,036 INFO L226 Difference]: Without dead ends: 33 [2021-12-16 05:55:06,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:55:06,037 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:06,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-16 05:55:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-16 05:55:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-16 05:55:06,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 7 [2021-12-16 05:55:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-16 05:55:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-16 05:55:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:55:06,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:06,040 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:06,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:55:06,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-12-16 05:55:06,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:06,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606572418] [2021-12-16 05:55:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:06,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606572418] [2021-12-16 05:55:06,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606572418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057490671] [2021-12-16 05:55:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:06,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:06,081 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) [2021-12-16 05:55:06,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:55:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:55:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057490671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:06,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:06,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-16 05:55:06,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027566370] [2021-12-16 05:55:06,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:06,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:55:06,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:55:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:55:06,248 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:06,299 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-12-16 05:55:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 05:55:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:06,301 INFO L225 Difference]: With dead ends: 101 [2021-12-16 05:55:06,301 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 05:55:06,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:55:06,302 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:06,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 94 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 05:55:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 45. [2021-12-16 05:55:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-16 05:55:06,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 10 [2021-12-16 05:55:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:06,307 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-16 05:55:06,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-16 05:55:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:55:06,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:06,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:06,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 05:55:06,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:06,525 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-12-16 05:55:06,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:06,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011181822] [2021-12-16 05:55:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:06,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:06,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:06,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011181822] [2021-12-16 05:55:06,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011181822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:06,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:55:06,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:55:06,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081333969] [2021-12-16 05:55:06,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:06,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:55:06,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:55:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:55:06,588 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:06,624 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-16 05:55:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:06,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:55:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:06,625 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:55:06,625 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:55:06,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:55:06,626 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:06,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:55:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-16 05:55:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-16 05:55:06,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 11 [2021-12-16 05:55:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:06,629 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-16 05:55:06,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-16 05:55:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:55:06,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:06,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:06,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 05:55:06,630 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2021-12-16 05:55:06,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940975552] [2021-12-16 05:55:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:06,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:06,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940975552] [2021-12-16 05:55:06,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940975552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:06,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374377957] [2021-12-16 05:55:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:06,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:06,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:06,665 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) [2021-12-16 05:55:06,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:55:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:55:06,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:06,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374377957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:06,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:06,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-16 05:55:06,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360384179] [2021-12-16 05:55:06,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:06,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:55:06,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:55:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:55:06,791 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:06,815 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-12-16 05:55:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 05:55:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:06,816 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:55:06,816 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:55:06,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:55:06,816 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:06,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:55:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-16 05:55:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-12-16 05:55:06,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 12 [2021-12-16 05:55:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-12-16 05:55:06,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-12-16 05:55:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:55:06,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:06,820 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-16 05:55:06,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:07,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 05:55:07,036 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-12-16 05:55:07,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:07,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131065235] [2021-12-16 05:55:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:07,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:07,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:07,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131065235] [2021-12-16 05:55:07,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131065235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:07,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040137643] [2021-12-16 05:55:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:07,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:07,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:07,103 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) [2021-12-16 05:55:07,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:55:07,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:07,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:55:07,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:07,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040137643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:07,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-16 05:55:07,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290430945] [2021-12-16 05:55:07,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:07,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 05:55:07,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 05:55:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:55:07,654 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:07,804 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-12-16 05:55:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:55:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 05:55:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:07,805 INFO L225 Difference]: With dead ends: 88 [2021-12-16 05:55:07,805 INFO L226 Difference]: Without dead ends: 88 [2021-12-16 05:55:07,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:55:07,806 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 261 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:07,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 150 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-16 05:55:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 42. [2021-12-16 05:55:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-16 05:55:07,810 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2021-12-16 05:55:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:07,810 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-16 05:55:07,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-16 05:55:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:55:07,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:07,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:07,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:08,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:08,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash 191446136, now seen corresponding path program 2 times [2021-12-16 05:55:08,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:08,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011846478] [2021-12-16 05:55:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:08,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:08,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:08,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011846478] [2021-12-16 05:55:08,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011846478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:08,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320810548] [2021-12-16 05:55:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:08,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:08,100 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) [2021-12-16 05:55:08,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:55:08,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:55:08,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 05:55:08,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:08,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:55:08,191 INFO L388 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 [2021-12-16 05:55:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 05:55:08,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:55:08,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320810548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:08,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:55:08,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 05:55:08,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210848052] [2021-12-16 05:55:08,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:08,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:55:08,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:55:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:55:08,350 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:08,364 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-16 05:55:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:55:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 05:55:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:08,364 INFO L225 Difference]: With dead ends: 68 [2021-12-16 05:55:08,365 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 05:55:08,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:55:08,365 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:08,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:55:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 05:55:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-12-16 05:55:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-16 05:55:08,368 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2021-12-16 05:55:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:08,368 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-16 05:55:08,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-16 05:55:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 05:55:08,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:08,369 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:08,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:08,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:08,584 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1338653091, now seen corresponding path program 1 times [2021-12-16 05:55:08,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:08,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355870104] [2021-12-16 05:55:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:08,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 05:55:08,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355870104] [2021-12-16 05:55:08,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355870104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537685385] [2021-12-16 05:55:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:08,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:08,715 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) [2021-12-16 05:55:08,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:55:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:55:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:08,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:08,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537685385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:08,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:08,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2021-12-16 05:55:08,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550710392] [2021-12-16 05:55:08,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:08,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:55:08,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:55:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:55:08,999 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:09,319 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2021-12-16 05:55:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:55:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 05:55:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:09,321 INFO L225 Difference]: With dead ends: 132 [2021-12-16 05:55:09,321 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 05:55:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:55:09,322 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:09,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 05:55:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2021-12-16 05:55:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 124 states have (on average 1.0564516129032258) internal successors, (131), 126 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2021-12-16 05:55:09,326 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 33 [2021-12-16 05:55:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:09,326 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2021-12-16 05:55:09,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2021-12-16 05:55:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 05:55:09,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:09,328 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:09,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:09,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 05:55:09,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1655200729, now seen corresponding path program 1 times [2021-12-16 05:55:09,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662746491] [2021-12-16 05:55:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:09,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:09,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662746491] [2021-12-16 05:55:09,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662746491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721728656] [2021-12-16 05:55:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:09,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:09,696 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) [2021-12-16 05:55:09,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:55:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:55:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:10,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:10,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721728656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:10,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:10,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2021-12-16 05:55:10,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864959709] [2021-12-16 05:55:10,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:10,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 05:55:10,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 05:55:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:55:10,452 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:10,556 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2021-12-16 05:55:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:55:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-16 05:55:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:10,558 INFO L225 Difference]: With dead ends: 247 [2021-12-16 05:55:10,558 INFO L226 Difference]: Without dead ends: 247 [2021-12-16 05:55:10,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:55:10,559 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:10,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 79 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-16 05:55:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-12-16 05:55:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.028688524590164) internal successors, (251), 246 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2021-12-16 05:55:10,579 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 66 [2021-12-16 05:55:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:10,580 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2021-12-16 05:55:10,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2021-12-16 05:55:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-16 05:55:10,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:10,585 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:10,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:10,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:10,799 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1510297113, now seen corresponding path program 2 times [2021-12-16 05:55:10,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336519852] [2021-12-16 05:55:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:10,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:55:11,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336519852] [2021-12-16 05:55:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336519852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575704621] [2021-12-16 05:55:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:11,084 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) [2021-12-16 05:55:11,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:55:11,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:55:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:55:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2021-12-16 05:55:11,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:55:11,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575704621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:11,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:55:11,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2021-12-16 05:55:11,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010719637] [2021-12-16 05:55:11,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:11,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:55:11,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:55:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-16 05:55:11,968 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:11,971 INFO L93 Difference]: Finished difference Result 248 states and 251 transitions. [2021-12-16 05:55:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:55:11,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-16 05:55:11,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:11,973 INFO L225 Difference]: With dead ends: 248 [2021-12-16 05:55:11,973 INFO L226 Difference]: Without dead ends: 246 [2021-12-16 05:55:11,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-16 05:55:11,974 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:11,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-16 05:55:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-16 05:55:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-12-16 05:55:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 243 states have (on average 1.0246913580246915) internal successors, (249), 245 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 249 transitions. [2021-12-16 05:55:11,979 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 249 transitions. Word has length 126 [2021-12-16 05:55:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:11,980 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 249 transitions. [2021-12-16 05:55:11,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 249 transitions. [2021-12-16 05:55:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-16 05:55:11,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:11,985 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:12,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:12,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:12,200 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash 425552256, now seen corresponding path program 1 times [2021-12-16 05:55:12,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:12,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161846154] [2021-12-16 05:55:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:12,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161846154] [2021-12-16 05:55:12,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161846154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285791196] [2021-12-16 05:55:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:12,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:12,573 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) [2021-12-16 05:55:12,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:55:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:12,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 05:55:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:13,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:55:13,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285791196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:13,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:13,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 57 [2021-12-16 05:55:13,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223419571] [2021-12-16 05:55:13,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:13,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-16 05:55:13,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-16 05:55:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1365, Invalid=1827, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 05:55:13,860 INFO L87 Difference]: Start difference. First operand 246 states and 249 transitions. Second operand has 57 states, 57 states have (on average 5.0) internal successors, (285), 57 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:14,060 INFO L93 Difference]: Finished difference Result 346 states and 349 transitions. [2021-12-16 05:55:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 05:55:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.0) internal successors, (285), 57 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-16 05:55:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:14,062 INFO L225 Difference]: With dead ends: 346 [2021-12-16 05:55:14,062 INFO L226 Difference]: Without dead ends: 346 [2021-12-16 05:55:14,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1365, Invalid=1827, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 05:55:14,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:14,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 71 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:55:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-16 05:55:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-12-16 05:55:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 343 states have (on average 1.0174927113702623) internal successors, (349), 345 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 349 transitions. [2021-12-16 05:55:14,088 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 349 transitions. Word has length 127 [2021-12-16 05:55:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:14,088 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 349 transitions. [2021-12-16 05:55:14,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.0) internal successors, (285), 57 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 349 transitions. [2021-12-16 05:55:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-16 05:55:14,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:14,092 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:14,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:14,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 05:55:14,293 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1845056352, now seen corresponding path program 2 times [2021-12-16 05:55:14,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:14,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649280518] [2021-12-16 05:55:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:14,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2021-12-16 05:55:14,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649280518] [2021-12-16 05:55:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649280518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379677370] [2021-12-16 05:55:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:55:14,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:14,430 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) [2021-12-16 05:55:14,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:55:14,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:55:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 05:55:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2021-12-16 05:55:14,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-12-16 05:55:15,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379677370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:15,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:15,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2021-12-16 05:55:15,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471978859] [2021-12-16 05:55:15,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:15,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:55:15,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:55:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:55:15,124 INFO L87 Difference]: Start difference. First operand 346 states and 349 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:15,192 INFO L93 Difference]: Finished difference Result 698 states and 703 transitions. [2021-12-16 05:55:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:55:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-16 05:55:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:15,194 INFO L225 Difference]: With dead ends: 698 [2021-12-16 05:55:15,194 INFO L226 Difference]: Without dead ends: 698 [2021-12-16 05:55:15,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:15,195 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 104 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:15,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 117 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-12-16 05:55:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2021-12-16 05:55:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 691 states have (on average 1.0173661360347324) internal successors, (703), 693 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 703 transitions. [2021-12-16 05:55:15,202 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 703 transitions. Word has length 177 [2021-12-16 05:55:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:15,203 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 703 transitions. [2021-12-16 05:55:15,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 703 transitions. [2021-12-16 05:55:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-16 05:55:15,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:15,205 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:15,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:15,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 05:55:15,422 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1138865693, now seen corresponding path program 1 times [2021-12-16 05:55:15,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950248292] [2021-12-16 05:55:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:15,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-16 05:55:15,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950248292] [2021-12-16 05:55:15,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950248292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962009366] [2021-12-16 05:55:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:15,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:15,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:15,665 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) [2021-12-16 05:55:15,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:55:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 05:55:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:15,906 INFO L388 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 [2021-12-16 05:55:15,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:55:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-16 05:55:17,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-16 05:55:18,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962009366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:18,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:18,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2021-12-16 05:55:18,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784891015] [2021-12-16 05:55:18,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:18,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:55:18,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:18,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:55:18,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:18,633 INFO L87 Difference]: Start difference. First operand 694 states and 703 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:18,726 INFO L93 Difference]: Finished difference Result 858 states and 866 transitions. [2021-12-16 05:55:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:55:18,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-12-16 05:55:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:18,729 INFO L225 Difference]: With dead ends: 858 [2021-12-16 05:55:18,729 INFO L226 Difference]: Without dead ends: 858 [2021-12-16 05:55:18,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:55:18,729 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:18,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 103 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-12-16 05:55:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2021-12-16 05:55:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 855 states have (on average 1.0128654970760234) internal successors, (866), 857 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 866 transitions. [2021-12-16 05:55:18,738 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 866 transitions. Word has length 334 [2021-12-16 05:55:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:18,739 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 866 transitions. [2021-12-16 05:55:18,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 866 transitions. [2021-12-16 05:55:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-12-16 05:55:18,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:18,746 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:18,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:18,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 05:55:18,963 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1652938709, now seen corresponding path program 3 times [2021-12-16 05:55:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37124217] [2021-12-16 05:55:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:18,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 31150 refuted. 0 times theorem prover too weak. 10050 trivial. 0 not checked. [2021-12-16 05:55:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37124217] [2021-12-16 05:55:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37124217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589768853] [2021-12-16 05:55:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:55:19,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:19,287 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) [2021-12-16 05:55:19,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:55:19,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 05:55:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:19,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 05:55:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:19,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:55:19,429 INFO L388 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 [2021-12-16 05:55:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 41198 trivial. 0 not checked. [2021-12-16 05:55:21,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 41198 trivial. 0 not checked. [2021-12-16 05:55:24,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589768853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:24,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:24,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 13 [2021-12-16 05:55:24,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879798697] [2021-12-16 05:55:24,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:24,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:55:24,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:55:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:55:24,267 INFO L87 Difference]: Start difference. First operand 858 states and 866 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:24,477 INFO L93 Difference]: Finished difference Result 1376 states and 1389 transitions. [2021-12-16 05:55:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:55:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 678 [2021-12-16 05:55:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:24,480 INFO L225 Difference]: With dead ends: 1376 [2021-12-16 05:55:24,480 INFO L226 Difference]: Without dead ends: 1376 [2021-12-16 05:55:24,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 1350 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:55:24,481 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 279 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:24,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 187 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:55:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-12-16 05:55:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1372. [2021-12-16 05:55:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1369 states have (on average 1.0116873630387144) internal successors, (1385), 1371 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1385 transitions. [2021-12-16 05:55:24,494 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1385 transitions. Word has length 678 [2021-12-16 05:55:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:24,494 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1385 transitions. [2021-12-16 05:55:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1385 transitions. [2021-12-16 05:55:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2021-12-16 05:55:24,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:24,507 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:55:24,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:55:24,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 05:55:24,720 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 77125929, now seen corresponding path program 1 times [2021-12-16 05:55:24,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171929231] [2021-12-16 05:55:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:24,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12605 trivial. 0 not checked. [2021-12-16 05:55:25,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171929231] [2021-12-16 05:55:25,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171929231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527911537] [2021-12-16 05:55:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:25,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:25,125 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) [2021-12-16 05:55:25,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:55:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 05:55:25,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64520 trivial. 0 not checked. [2021-12-16 05:55:30,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:55:30,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527911537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:55:30,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:55:30,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-16 05:55:30,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882259062] [2021-12-16 05:55:30,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:55:30,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:55:30,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:30,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:55:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:30,448 INFO L87 Difference]: Start difference. First operand 1372 states and 1385 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:30,450 INFO L93 Difference]: Finished difference Result 1371 states and 1384 transitions. [2021-12-16 05:55:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:55:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 862 [2021-12-16 05:55:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:30,454 INFO L225 Difference]: With dead ends: 1371 [2021-12-16 05:55:30,454 INFO L226 Difference]: Without dead ends: 1369 [2021-12-16 05:55:30,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:55:30,454 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:30,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-12-16 05:55:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-12-16 05:55:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1369. [2021-12-16 05:55:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1367 states have (on average 1.0095098756400878) internal successors, (1380), 1368 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1380 transitions. [2021-12-16 05:55:30,467 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1380 transitions. Word has length 862 [2021-12-16 05:55:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:30,468 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1380 transitions. [2021-12-16 05:55:30,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1380 transitions. [2021-12-16 05:55:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2021-12-16 05:55:30,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:30,473 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 8, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-12-16 05:55:30,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-16 05:55:30,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:30,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1006125646, now seen corresponding path program 4 times [2021-12-16 05:55:30,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:30,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143983438] [2021-12-16 05:55:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64573 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12658 trivial. 0 not checked. [2021-12-16 05:55:31,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143983438] [2021-12-16 05:55:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143983438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457924351] [2021-12-16 05:55:31,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:55:31,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:31,112 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) [2021-12-16 05:55:31,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 05:55:35,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:55:35,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:55:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 05:55:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:55:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:55:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-16 05:55:35,133 INFO L388 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 [2021-12-16 05:55:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 64573 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 64475 trivial. 0 not checked. [2021-12-16 05:55:37,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:55:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 64573 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 64475 trivial. 0 not checked. [2021-12-16 05:55:41,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457924351] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:55:41,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:55:41,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2021-12-16 05:55:41,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548757417] [2021-12-16 05:55:41,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:55:41,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 05:55:41,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:55:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 05:55:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:55:41,750 INFO L87 Difference]: Start difference. First operand 1369 states and 1380 transitions. Second operand has 28 states, 28 states have (on average 5.678571428571429) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:55:42,522 INFO L93 Difference]: Finished difference Result 2916 states and 2942 transitions. [2021-12-16 05:55:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:55:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.678571428571429) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 869 [2021-12-16 05:55:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:55:42,531 INFO L225 Difference]: With dead ends: 2916 [2021-12-16 05:55:42,531 INFO L226 Difference]: Without dead ends: 2916 [2021-12-16 05:55:42,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1753 GetRequests, 1718 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 05:55:42,532 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 809 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:55:42,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 998 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:55:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-12-16 05:55:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2908. [2021-12-16 05:55:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2906 states have (on average 1.0096352374397797) internal successors, (2934), 2907 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 2934 transitions. [2021-12-16 05:55:42,567 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 2934 transitions. Word has length 869 [2021-12-16 05:55:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:55:42,568 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 2934 transitions. [2021-12-16 05:55:42,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.678571428571429) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:55:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 2934 transitions. [2021-12-16 05:55:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1407 [2021-12-16 05:55:42,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:55:42,581 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 256, 17, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2021-12-16 05:55:42,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 05:55:42,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-16 05:55:42,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-16 05:55:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:55:42,808 INFO L85 PathProgramCache]: Analyzing trace with hash -201422120, now seen corresponding path program 5 times [2021-12-16 05:55:42,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:55:42,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080592166] [2021-12-16 05:55:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:55:42,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:55:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:55:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 165964 backedges. 0 proven. 145356 refuted. 0 times theorem prover too weak. 20608 trivial. 0 not checked. [2021-12-16 05:55:44,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:55:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080592166] [2021-12-16 05:55:44,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080592166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:55:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675226881] [2021-12-16 05:55:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:55:44,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:55:44,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:55:44,317 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) [2021-12-16 05:55:44,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process