./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/running_example.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-data/running_example.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:44:38,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:44:38,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:44:38,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:44:38,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:44:38,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:44:38,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:44:38,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:44:38,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:44:38,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:44:38,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:44:38,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:44:38,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:44:38,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:44:38,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:44:38,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:44:38,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:44:38,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:44:38,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:44:38,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:44:38,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:44:38,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:44:38,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:44:38,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:44:38,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:44:38,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:44:38,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:44:38,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:44:38,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:44:38,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:44:38,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:44:38,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:44:38,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:44:38,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:44:38,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:44:38,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:44:38,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:44:38,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:44:38,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:44:38,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:44:38,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:44:38,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:44:38,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:44:38,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:44:38,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:44:38,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:44:38,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:44:38,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:44:38,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:44:38,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:44:38,223 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:44:38,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:44:38,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:44:38,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:44:38,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:44:38,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:44:38,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:44:38,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:44:38,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:44:38,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:44:38,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:44:38,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:44:38,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:44:38,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:44:38,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-12-14 13:44:38,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:44:38,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:44:38,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:44:38,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:44:38,448 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:44:38,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/running_example.i [2021-12-14 13:44:38,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b95fdfa68/6aa9d8c1b4274bef81a5685b2576ae14/FLAGc36e02618 [2021-12-14 13:44:38,915 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:44:38,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/running_example.i [2021-12-14 13:44:38,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b95fdfa68/6aa9d8c1b4274bef81a5685b2576ae14/FLAGc36e02618 [2021-12-14 13:44:38,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b95fdfa68/6aa9d8c1b4274bef81a5685b2576ae14 [2021-12-14 13:44:38,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:44:38,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:44:38,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:44:38,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:44:38,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:44:38,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:44:38" (1/1) ... [2021-12-14 13:44:38,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520c0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:38, skipping insertion in model container [2021-12-14 13:44:38,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:44:38" (1/1) ... [2021-12-14 13:44:38,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:44:38,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:44:39,218 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-12-14 13:44:39,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:44:39,233 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:44:39,274 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-12-14 13:44:39,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:44:39,292 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:44:39,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39 WrapperNode [2021-12-14 13:44:39,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:44:39,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:44:39,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:44:39,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:44:39,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,320 INFO L137 Inliner]: procedures = 121, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2021-12-14 13:44:39,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:44:39,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:44:39,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:44:39,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:44:39,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:44:39,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:44:39,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:44:39,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:44:39,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (1/1) ... [2021-12-14 13:44:39,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:44:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:39,362 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) [2021-12-14 13:44:39,368 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 [2021-12-14 13:44:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 13:44:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 13:44:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:44:39,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:44:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 13:44:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 13:44:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:44:39,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:44:39,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:44:39,498 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:44:39,500 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:44:39,691 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:44:39,698 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:44:39,702 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 13:44:39,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:44:39 BoogieIcfgContainer [2021-12-14 13:44:39,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:44:39,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:44:39,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:44:39,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:44:39,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:44:38" (1/3) ... [2021-12-14 13:44:39,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cdd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:44:39, skipping insertion in model container [2021-12-14 13:44:39,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:39" (2/3) ... [2021-12-14 13:44:39,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cdd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:44:39, skipping insertion in model container [2021-12-14 13:44:39,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:44:39" (3/3) ... [2021-12-14 13:44:39,712 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-12-14 13:44:39,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:44:39,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:44:39,764 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:44:39,770 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:44:39,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:44:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 13:44:39,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:39,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:39,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 538476752, now seen corresponding path program 1 times [2021-12-14 13:44:39,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:39,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971466801] [2021-12-14 13:44:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:39,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:39,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:39,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971466801] [2021-12-14 13:44:39,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971466801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:44:39,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:44:39,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:44:39,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047117724] [2021-12-14 13:44:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:44:39,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:44:39,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:44:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:44:39,946 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-14 13:44:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:39,955 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2021-12-14 13:44:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:44:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-12-14 13:44:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:39,963 INFO L225 Difference]: With dead ends: 27 [2021-12-14 13:44:39,964 INFO L226 Difference]: Without dead ends: 15 [2021-12-14 13:44:39,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:44:39,970 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:39,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:44:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-14 13:44:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-14 13:44:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2021-12-14 13:44:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2021-12-14 13:44:40,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 8 [2021-12-14 13:44:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:40,002 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-12-14 13:44:40,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-14 13:44:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2021-12-14 13:44:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 13:44:40,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:40,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:40,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:44:40,004 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1314112902, now seen corresponding path program 1 times [2021-12-14 13:44:40,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:40,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576290937] [2021-12-14 13:44:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:40,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:40,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:40,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576290937] [2021-12-14 13:44:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576290937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:44:40,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:44:40,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 13:44:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843990855] [2021-12-14 13:44:40,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:44:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 13:44:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 13:44:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 13:44:40,133 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-12-14 13:44:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:40,259 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-12-14 13:44:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:44:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 10 [2021-12-14 13:44:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:40,264 INFO L225 Difference]: With dead ends: 37 [2021-12-14 13:44:40,265 INFO L226 Difference]: Without dead ends: 28 [2021-12-14 13:44:40,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:44:40,266 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:40,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:44:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-14 13:44:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-14 13:44:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-12-14 13:44:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-12-14 13:44:40,273 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 10 [2021-12-14 13:44:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:40,274 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-12-14 13:44:40,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-12-14 13:44:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-12-14 13:44:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 13:44:40,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:40,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:40,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:44:40,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1215852288, now seen corresponding path program 1 times [2021-12-14 13:44:40,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:40,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648034116] [2021-12-14 13:44:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:40,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:40,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648034116] [2021-12-14 13:44:40,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648034116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636878656] [2021-12-14 13:44:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:40,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:40,397 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) [2021-12-14 13:44:40,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:44:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:40,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 13:44:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:40,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:44:40,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:40,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-14 13:44:40,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 13:44:40,619 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 13:44:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 13:44:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:40,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:40,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636878656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:40,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:40,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-14 13:44:40,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219937752] [2021-12-14 13:44:40,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:40,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 13:44:40,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 13:44:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=62, Unknown=3, NotChecked=0, Total=90 [2021-12-14 13:44:40,856 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:40,995 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2021-12-14 13:44:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:44:40,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-14 13:44:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:40,997 INFO L225 Difference]: With dead ends: 69 [2021-12-14 13:44:40,997 INFO L226 Difference]: Without dead ends: 67 [2021-12-14 13:44:40,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=117, Unknown=3, NotChecked=0, Total=182 [2021-12-14 13:44:40,998 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:40,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 97 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 83 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-14 13:44:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-14 13:44:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2021-12-14 13:44:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 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) [2021-12-14 13:44:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2021-12-14 13:44:41,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 14 [2021-12-14 13:44:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2021-12-14 13:44:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2021-12-14 13:44:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 13:44:41,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:41,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:41,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 13:44:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:41,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1215850366, now seen corresponding path program 1 times [2021-12-14 13:44:41,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801961339] [2021-12-14 13:44:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:41,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:41,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:41,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801961339] [2021-12-14 13:44:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801961339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94798124] [2021-12-14 13:44:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:41,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:41,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:41,356 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) [2021-12-14 13:44:41,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:44:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:41,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 13:44:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:41,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:44:41,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-14 13:44:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:41,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 13:44:41,519 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 13:44:41,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 13:44:41,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:41,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94798124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:41,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:41,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-14 13:44:41,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641364795] [2021-12-14 13:44:41,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:41,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 13:44:41,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 13:44:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-14 13:44:41,685 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-12-14 13:44:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:41,881 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2021-12-14 13:44:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 13:44:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) Word has length 14 [2021-12-14 13:44:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:41,883 INFO L225 Difference]: With dead ends: 135 [2021-12-14 13:44:41,883 INFO L226 Difference]: Without dead ends: 116 [2021-12-14 13:44:41,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-12-14 13:44:41,884 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 143 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:41,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 102 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 114 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-12-14 13:44:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-14 13:44:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 67. [2021-12-14 13:44:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5) internal successors, (99), 66 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) [2021-12-14 13:44:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 99 transitions. [2021-12-14 13:44:41,892 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 99 transitions. Word has length 14 [2021-12-14 13:44:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:41,892 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 99 transitions. [2021-12-14 13:44:41,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-12-14 13:44:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 99 transitions. [2021-12-14 13:44:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:44:41,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:41,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:41,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:44:42,110 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,SelfDestructingSolverStorable3 [2021-12-14 13:44:42,111 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash 658296035, now seen corresponding path program 1 times [2021-12-14 13:44:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:42,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526886568] [2021-12-14 13:44:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:42,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526886568] [2021-12-14 13:44:42,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526886568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677862170] [2021-12-14 13:44:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:42,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:42,180 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) [2021-12-14 13:44:42,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:44:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 13:44:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:42,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 17 [2021-12-14 13:44:42,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:42,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 17 [2021-12-14 13:44:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:42,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:44:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:42,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:44:42,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:42,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:42,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:42,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677862170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:42,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:42,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-14 13:44:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759522204] [2021-12-14 13:44:42,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:44:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:44:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:44:42,414 INFO L87 Difference]: Start difference. First operand 67 states and 99 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:42,515 INFO L93 Difference]: Finished difference Result 165 states and 241 transitions. [2021-12-14 13:44:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 13:44:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 13:44:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:42,516 INFO L225 Difference]: With dead ends: 165 [2021-12-14 13:44:42,516 INFO L226 Difference]: Without dead ends: 124 [2021-12-14 13:44:42,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 13:44:42,517 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:42,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:44:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-14 13:44:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2021-12-14 13:44:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.4513274336283186) internal successors, (164), 113 states have internal predecessors, (164), 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) [2021-12-14 13:44:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2021-12-14 13:44:42,525 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 16 [2021-12-14 13:44:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:42,525 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2021-12-14 13:44:42,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2021-12-14 13:44:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:44:42,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:42,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:42,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 13:44:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:42,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash 385260059, now seen corresponding path program 1 times [2021-12-14 13:44:42,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992771307] [2021-12-14 13:44:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:44:42,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:42,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992771307] [2021-12-14 13:44:42,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992771307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:44:42,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:44:42,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:44:42,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675622030] [2021-12-14 13:44:42,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:44:42,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:44:42,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:44:42,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:44:42,800 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-12-14 13:44:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:42,840 INFO L93 Difference]: Finished difference Result 133 states and 189 transitions. [2021-12-14 13:44:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:44:42,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-12-14 13:44:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:42,841 INFO L225 Difference]: With dead ends: 133 [2021-12-14 13:44:42,841 INFO L226 Difference]: Without dead ends: 107 [2021-12-14 13:44:42,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:44:42,842 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:42,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:44:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-14 13:44:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-12-14 13:44:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 105 states have internal predecessors, (152), 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) [2021-12-14 13:44:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 152 transitions. [2021-12-14 13:44:42,863 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 152 transitions. Word has length 18 [2021-12-14 13:44:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 152 transitions. [2021-12-14 13:44:42,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-12-14 13:44:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 152 transitions. [2021-12-14 13:44:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:44:42,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:42,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:42,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 13:44:42,864 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash 455619718, now seen corresponding path program 2 times [2021-12-14 13:44:42,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:42,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550510708] [2021-12-14 13:44:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:42,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:42,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:42,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550510708] [2021-12-14 13:44:42,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550510708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520261731] [2021-12-14 13:44:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:44:42,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:42,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:42,968 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) [2021-12-14 13:44:42,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:44:43,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:44:43,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:44:43,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 13:44:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:43,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:44:43,143 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 13:44:43,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 13:44:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:43,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-14 13:44:43,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 13:44:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:43,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 13:44:43,230 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-14 13:44:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 13:44:43,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:43,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:43,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_24| Int) (v_ArrVal_361 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_24|) 0)) (<= 10 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| v_ArrVal_359) |v_ULTIMATE.start_main_~p~0#1.base_24| v_ArrVal_361) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|)))) is different from false [2021-12-14 13:44:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-12-14 13:44:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520261731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:43,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:43,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-12-14 13:44:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446947079] [2021-12-14 13:44:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 13:44:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 13:44:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=5, NotChecked=24, Total=210 [2021-12-14 13:44:43,490 INFO L87 Difference]: Start difference. First operand 106 states and 152 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-12-14 13:44:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:43,959 INFO L93 Difference]: Finished difference Result 165 states and 236 transitions. [2021-12-14 13:44:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 13:44:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-14 13:44:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:43,961 INFO L225 Difference]: With dead ends: 165 [2021-12-14 13:44:43,961 INFO L226 Difference]: Without dead ends: 156 [2021-12-14 13:44:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=793, Unknown=9, NotChecked=62, Total=1122 [2021-12-14 13:44:43,962 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:43,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 157 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 140 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-12-14 13:44:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-14 13:44:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2021-12-14 13:44:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 131 states have internal predecessors, (191), 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) [2021-12-14 13:44:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 191 transitions. [2021-12-14 13:44:43,969 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 191 transitions. Word has length 18 [2021-12-14 13:44:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:43,969 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 191 transitions. [2021-12-14 13:44:43,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-12-14 13:44:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 191 transitions. [2021-12-14 13:44:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 13:44:43,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:43,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:44,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:44:44,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:44,186 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash 625125097, now seen corresponding path program 1 times [2021-12-14 13:44:44,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:44,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91220061] [2021-12-14 13:44:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:44,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:44,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91220061] [2021-12-14 13:44:44,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91220061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922300136] [2021-12-14 13:44:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:44,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:44,316 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) [2021-12-14 13:44:44,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:44:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 13:44:44,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:44,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 17 [2021-12-14 13:44:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:44,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 17 [2021-12-14 13:44:44,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:44,488 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 13:44:44,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-12-14 13:44:44,500 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-14 13:44:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2021-12-14 13:44:44,512 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 13:44:44,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2021-12-14 13:44:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:44,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-12-14 13:44:44,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-14 13:44:44,558 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-14 13:44:44,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-14 13:44:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:44,839 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-14 13:44:44,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 50 [2021-12-14 13:44:44,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 13:44:44,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:44,857 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-14 13:44:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-12-14 13:44:44,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-14 13:44:44,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:44,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:44,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:45,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:45,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 63 [2021-12-14 13:44:45,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:45,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 142 [2021-12-14 13:44:45,447 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 53 treesize of output 29 [2021-12-14 13:44:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922300136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:46,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:46,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-14 13:44:46,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686688482] [2021-12-14 13:44:46,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:46,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 13:44:46,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 13:44:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=281, Unknown=7, NotChecked=0, Total=342 [2021-12-14 13:44:46,582 INFO L87 Difference]: Start difference. First operand 132 states and 191 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) [2021-12-14 13:44:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:46,786 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2021-12-14 13:44:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 13:44:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) Word has length 20 [2021-12-14 13:44:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:46,787 INFO L225 Difference]: With dead ends: 166 [2021-12-14 13:44:46,787 INFO L226 Difference]: Without dead ends: 164 [2021-12-14 13:44:46,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=493, Unknown=7, NotChecked=0, Total=600 [2021-12-14 13:44:46,788 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:46,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 188 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-14 13:44:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-14 13:44:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 145. [2021-12-14 13:44:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.4583333333333333) internal successors, (210), 144 states have internal predecessors, (210), 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) [2021-12-14 13:44:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 210 transitions. [2021-12-14 13:44:46,802 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 210 transitions. Word has length 20 [2021-12-14 13:44:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:46,802 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 210 transitions. [2021-12-14 13:44:46,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) [2021-12-14 13:44:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 210 transitions. [2021-12-14 13:44:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 13:44:46,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:46,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:46,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:44:47,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:47,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash 625127019, now seen corresponding path program 1 times [2021-12-14 13:44:47,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:47,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281489080] [2021-12-14 13:44:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:47,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:47,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281489080] [2021-12-14 13:44:47,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281489080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628938103] [2021-12-14 13:44:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:47,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:47,191 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) [2021-12-14 13:44:47,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:44:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:47,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 13:44:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:47,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:47,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 17 [2021-12-14 13:44:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:47,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 17 [2021-12-14 13:44:47,351 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 13:44:47,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-12-14 13:44:47,365 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-14 13:44:47,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2021-12-14 13:44:47,375 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 13:44:47,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2021-12-14 13:44:47,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-14 13:44:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-12-14 13:44:47,400 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-14 13:44:47,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-14 13:44:47,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:47,666 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-14 13:44:47,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 50 [2021-12-14 13:44:47,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:47,681 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-12-14 13:44:47,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-12-14 13:44:47,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 13:44:47,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-14 13:44:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:47,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:48,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:48,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 63 [2021-12-14 13:44:48,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 142 [2021-12-14 13:44:48,133 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 53 treesize of output 29 [2021-12-14 13:44:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628938103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:49,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:49,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-12-14 13:44:49,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470195113] [2021-12-14 13:44:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 13:44:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 13:44:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=244, Unknown=9, NotChecked=0, Total=306 [2021-12-14 13:44:49,214 INFO L87 Difference]: Start difference. First operand 145 states and 210 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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) [2021-12-14 13:44:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:49,367 INFO L93 Difference]: Finished difference Result 195 states and 282 transitions. [2021-12-14 13:44:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 13:44:49,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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 20 [2021-12-14 13:44:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:49,368 INFO L225 Difference]: With dead ends: 195 [2021-12-14 13:44:49,368 INFO L226 Difference]: Without dead ends: 155 [2021-12-14 13:44:49,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=399, Unknown=13, NotChecked=0, Total=506 [2021-12-14 13:44:49,369 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:49,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 186 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2021-12-14 13:44:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-14 13:44:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2021-12-14 13:44:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.443661971830986) internal successors, (205), 142 states have internal predecessors, (205), 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) [2021-12-14 13:44:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2021-12-14 13:44:49,375 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 20 [2021-12-14 13:44:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:49,375 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2021-12-14 13:44:49,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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) [2021-12-14 13:44:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2021-12-14 13:44:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 13:44:49,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:49,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:49,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 13:44:49,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:49,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -303805632, now seen corresponding path program 1 times [2021-12-14 13:44:49,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655958680] [2021-12-14 13:44:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:49,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 13:44:49,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655958680] [2021-12-14 13:44:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655958680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:44:49,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:44:49,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:44:49,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171751489] [2021-12-14 13:44:49,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:44:49,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:44:49,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:44:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:44:49,647 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:49,670 INFO L93 Difference]: Finished difference Result 255 states and 365 transitions. [2021-12-14 13:44:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:44:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 13:44:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:49,672 INFO L225 Difference]: With dead ends: 255 [2021-12-14 13:44:49,672 INFO L226 Difference]: Without dead ends: 159 [2021-12-14 13:44:49,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:44:49,673 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 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 [2021-12-14 13:44:49,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:44:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-14 13:44:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-12-14 13:44:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 134 states have internal predecessors, (181), 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) [2021-12-14 13:44:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 181 transitions. [2021-12-14 13:44:49,678 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 181 transitions. Word has length 20 [2021-12-14 13:44:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:49,678 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 181 transitions. [2021-12-14 13:44:49,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 181 transitions. [2021-12-14 13:44:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 13:44:49,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:49,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:49,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 13:44:49,682 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1427240287, now seen corresponding path program 1 times [2021-12-14 13:44:49,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:49,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27450817] [2021-12-14 13:44:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:49,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:44:49,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:49,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27450817] [2021-12-14 13:44:49,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27450817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:49,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057679668] [2021-12-14 13:44:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:49,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:49,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:49,796 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) [2021-12-14 13:44:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:44:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 13:44:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:49,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-14 13:44:49,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:44:50,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:50,096 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-12-14 13:44:50,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2021-12-14 13:44:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:44:50,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057679668] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:50,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:50,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2021-12-14 13:44:50,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811717760] [2021-12-14 13:44:50,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:50,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 13:44:50,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 13:44:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:44:50,130 INFO L87 Difference]: Start difference. First operand 135 states and 181 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:50,299 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2021-12-14 13:44:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 13:44:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 13:44:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:50,301 INFO L225 Difference]: With dead ends: 204 [2021-12-14 13:44:50,302 INFO L226 Difference]: Without dead ends: 202 [2021-12-14 13:44:50,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-12-14 13:44:50,302 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:50,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 118 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 92 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-14 13:44:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-14 13:44:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2021-12-14 13:44:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 151 states have internal predecessors, (211), 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) [2021-12-14 13:44:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 211 transitions. [2021-12-14 13:44:50,308 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 211 transitions. Word has length 22 [2021-12-14 13:44:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:50,308 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 211 transitions. [2021-12-14 13:44:50,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 211 transitions. [2021-12-14 13:44:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 13:44:50,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:50,310 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:50,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 13:44:50,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:50,529 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1356878706, now seen corresponding path program 2 times [2021-12-14 13:44:50,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:50,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627498404] [2021-12-14 13:44:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:50,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:44:50,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627498404] [2021-12-14 13:44:50,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627498404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728056997] [2021-12-14 13:44:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:44:50,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:50,655 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) [2021-12-14 13:44:50,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 13:44:50,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:44:50,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:44:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 13:44:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:50,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 13:44:50,860 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 13:44:50,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 13:44:50,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:50,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-14 13:44:50,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 13:44:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:50,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 13:44:50,936 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-14 13:44:50,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-14 13:44:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:51,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 13:44:51,032 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-14 13:44:51,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-14 13:44:51,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:51,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:51,128 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_41| Int) (v_ArrVal_874 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_41|) 0)) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| v_ArrVal_873) |v_ULTIMATE.start_main_~p~0#1.base_41| v_ArrVal_874) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 20))) is different from false [2021-12-14 13:44:51,167 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_868 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_41| Int) (|v_ULTIMATE.start_main_~tail~0#1.base_27| Int) (v_ArrVal_874 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (or (<= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| v_ArrVal_868) |v_ULTIMATE.start_main_~tail~0#1.base_27| v_ArrVal_873) |v_ULTIMATE.start_main_~p~0#1.base_41| v_ArrVal_874) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 20) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_27|) 0)) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_27| 1) |v_ULTIMATE.start_main_~p~0#1.base_41|) 0)))) is different from false [2021-12-14 13:44:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2021-12-14 13:44:51,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728056997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:44:51,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:44:51,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-12-14 13:44:51,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69848175] [2021-12-14 13:44:51,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:44:51,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:44:51,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:44:51,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:44:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=165, Unknown=2, NotChecked=54, Total=272 [2021-12-14 13:44:51,370 INFO L87 Difference]: Start difference. First operand 152 states and 211 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:44:51,634 INFO L93 Difference]: Finished difference Result 245 states and 342 transitions. [2021-12-14 13:44:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 13:44:51,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 13:44:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:44:51,635 INFO L225 Difference]: With dead ends: 245 [2021-12-14 13:44:51,635 INFO L226 Difference]: Without dead ends: 218 [2021-12-14 13:44:51,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=489, Unknown=2, NotChecked=98, Total=756 [2021-12-14 13:44:51,636 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:44:51,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 171 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 109 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2021-12-14 13:44:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-14 13:44:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 130. [2021-12-14 13:44:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 129 states have internal predecessors, (178), 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) [2021-12-14 13:44:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2021-12-14 13:44:51,640 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 22 [2021-12-14 13:44:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:44:51,640 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2021-12-14 13:44:51,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:44:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2021-12-14 13:44:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 13:44:51,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:44:51,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:44:51,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 13:44:51,851 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,SelfDestructingSolverStorable11 [2021-12-14 13:44:51,852 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:44:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:44:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1725952529, now seen corresponding path program 2 times [2021-12-14 13:44:51,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:44:51,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457970094] [2021-12-14 13:44:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:44:51,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:44:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:44:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:52,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:44:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457970094] [2021-12-14 13:44:52,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457970094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:44:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720875627] [2021-12-14 13:44:52,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:44:52,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:44:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:44:52,068 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) [2021-12-14 13:44:52,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 13:44:52,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:44:52,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:44:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 13:44:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:44:52,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 13:44:52,256 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 13:44:52,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 13:44:52,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2021-12-14 13:44:52,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 13:44:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2021-12-14 13:44:52,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 13:44:52,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-12-14 13:44:52,382 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-12-14 13:44:52,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 69 [2021-12-14 13:44:52,401 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-14 13:44:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 112 [2021-12-14 13:44:52,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-12-14 13:44:52,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 41 [2021-12-14 13:44:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-14 13:44:52,434 INFO L354 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2021-12-14 13:44:52,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 48 [2021-12-14 13:44:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 13:44:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:44:52,644 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-14 13:44:52,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 48 [2021-12-14 13:44:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-14 13:44:52,669 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 13:44:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 26 [2021-12-14 13:44:52,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 13:44:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:44:52,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:44:52,728 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 Int) (v_ArrVal_1025 Int) (v_ArrVal_1022 (Array Int Int))) (<= 10 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_1022) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_ArrVal_1025) .cse0)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_ArrVal_1023) .cse0))))) is different from false [2021-12-14 13:44:52,745 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 Int) (v_ArrVal_1025 Int) (v_ArrVal_1022 (Array Int Int))) (<= 10 (let ((.cse0 (+ |c_ULTIMATE.start_main_~list~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1022) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_ArrVal_1025) .cse0)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_ArrVal_1023) .cse0))))) is different from false [2021-12-14 13:44:52,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1019 (Array Int Int)) (v_ArrVal_1015 (Array Int Int)) (v_ArrVal_1023 Int) (v_ArrVal_1014 Int) (v_ArrVal_1012 (Array Int Int)) (v_ArrVal_1025 Int) (v_ArrVal_1017 Int) (v_ArrVal_1022 (Array Int Int)) (v_ArrVal_1020 (Array Int Int))) (or (not (= (select |c_#valid| v_ArrVal_1017) 0)) (<= 10 (let ((.cse1 (+ |c_ULTIMATE.start_main_~list~0#1.offset| 4))) (select (let ((.cse0 (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4))) (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse0 v_ArrVal_1014)) v_ArrVal_1017 v_ArrVal_1012) |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_1022) (select (store (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse0 v_ArrVal_1017)) v_ArrVal_1017 v_ArrVal_1019) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_ArrVal_1025) .cse1))) (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| v_ArrVal_1015) v_ArrVal_1017 v_ArrVal_1020) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_ArrVal_1023) .cse1)))))) is different from false [2021-12-14 13:44:52,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:52,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 82 [2021-12-14 13:44:52,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 354 [2021-12-14 13:44:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:44:52,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 323 treesize of output 265 [2021-12-14 13:44:52,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:52,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 209 [2021-12-14 13:44:52,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:52,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1440 treesize of output 1416 [2021-12-14 13:44:52,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:52,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2865 treesize of output 2823 [2021-12-14 13:44:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:44:52,957 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 2735 treesize of output 2639 [2021-12-14 13:44:52,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:44:52,979 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 2495 treesize of output 2303 [2021-12-14 13:44:53,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2070 treesize of output 1898 [2021-12-14 13:44:53,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:44:53,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1860 treesize of output 1793 [2021-12-14 13:44:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:44:53,073 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 1375 treesize of output 1307 [2021-12-14 13:44:53,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:44:53,147 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 1734 treesize of output 1606