./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:47:04,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:47:04,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:47:04,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:47:04,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:47:04,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:47:04,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:47:04,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:47:04,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:47:04,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:47:04,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:47:04,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:47:04,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:47:04,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:47:04,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:47:04,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:47:04,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:47:04,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:47:04,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:47:04,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:47:04,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:47:04,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:47:04,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:47:04,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:47:04,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:47:04,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:47:04,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:47:04,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:47:04,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:47:04,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:47:04,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:47:04,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:47:04,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:47:04,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:47:04,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:47:04,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:47:04,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:47:04,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:47:04,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:47:04,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:47:04,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:47:04,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:47:04,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:47:04,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:47:04,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:47:04,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:47:04,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:47:04,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:47:04,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:47:04,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:47:04,325 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:47:04,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:47:04,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:47:04,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:47:04,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:47:04,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:47:04,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:47:04,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:47:04,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:47:04,327 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:47:04,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:47:04,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:47:04,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:47:04,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:47:04,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:47:04,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:47:04,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:47:04,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:47:04,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:47:04,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:47:04,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:47:04,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:47:04,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:47:04,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:47:04,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:47:04,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:47:04,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d [2021-12-15 21:47:04,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:47:04,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:47:04,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:47:04,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:47:04,570 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:47:04,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2021-12-15 21:47:04,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f59666c/ed222005e9d24b4eb0f8b091acc1aec6/FLAG415fe85ee [2021-12-15 21:47:04,976 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:47:04,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2021-12-15 21:47:04,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f59666c/ed222005e9d24b4eb0f8b091acc1aec6/FLAG415fe85ee [2021-12-15 21:47:05,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f59666c/ed222005e9d24b4eb0f8b091acc1aec6 [2021-12-15 21:47:05,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:47:05,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:47:05,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:47:05,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:47:05,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:47:05,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510d0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05, skipping insertion in model container [2021-12-15 21:47:05,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:47:05,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:47:05,580 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c[415,428] [2021-12-15 21:47:05,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:47:05,607 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:47:05,618 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c[415,428] [2021-12-15 21:47:05,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:47:05,637 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:47:05,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05 WrapperNode [2021-12-15 21:47:05,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:47:05,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:47:05,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:47:05,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:47:05,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,664 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-12-15 21:47:05,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:47:05,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:47:05,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:47:05,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:47:05,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:47:05,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:47:05,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:47:05,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:47:05,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (1/1) ... [2021-12-15 21:47:05,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:47:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:05,728 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) [2021-12-15 21:47:05,750 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 [2021-12-15 21:47:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:47:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:47:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:47:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:47:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:47:05,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:47:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:47:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:47:05,818 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:47:05,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:47:05,922 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:47:05,926 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:47:05,926 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 21:47:05,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:47:05 BoogieIcfgContainer [2021-12-15 21:47:05,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:47:05,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:47:05,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:47:05,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:47:05,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:47:05" (1/3) ... [2021-12-15 21:47:05,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2866b598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:47:05, skipping insertion in model container [2021-12-15 21:47:05,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:47:05" (2/3) ... [2021-12-15 21:47:05,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2866b598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:47:05, skipping insertion in model container [2021-12-15 21:47:05,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:47:05" (3/3) ... [2021-12-15 21:47:05,939 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2021-12-15 21:47:05,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:47:05,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:47:05,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:47:05,981 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 [2021-12-15 21:47:05,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:47:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 21:47:05,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:06,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:06,000 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-12-15 21:47:06,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:06,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985304510] [2021-12-15 21:47:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:06,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:06,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985304510] [2021-12-15 21:47:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985304510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:47:06,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:47:06,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:47:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648038705] [2021-12-15 21:47:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:47:06,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:47:06,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:47:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:47:06,198 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:06,223 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-15 21:47:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:47:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 21:47:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:06,230 INFO L225 Difference]: With dead ends: 27 [2021-12-15 21:47:06,230 INFO L226 Difference]: Without dead ends: 12 [2021-12-15 21:47:06,233 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 [2021-12-15 21:47:06,237 INFO L933 BasicCegarLoop]: 18 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, 18 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 [2021-12-15 21:47:06,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:47:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-15 21:47:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-15 21:47:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2021-12-15 21:47:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-15 21:47:06,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-12-15 21:47:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:06,266 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-15 21:47:06,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-15 21:47:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 21:47:06,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:06,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:06,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:47:06,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-12-15 21:47:06,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:06,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675767141] [2021-12-15 21:47:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:06,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:06,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675767141] [2021-12-15 21:47:06,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675767141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:47:06,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:47:06,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:47:06,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182371218] [2021-12-15 21:47:06,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:47:06,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:47:06,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:47:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:47:06,374 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:06,406 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-15 21:47:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:47:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 21:47:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:06,408 INFO L225 Difference]: With dead ends: 29 [2021-12-15 21:47:06,408 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 21:47:06,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:47:06,413 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:06,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:47:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 21:47:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-12-15 21:47:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-15 21:47:06,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-12-15 21:47:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:06,421 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-15 21:47:06,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-15 21:47:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 21:47:06,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:06,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:06,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:47:06,427 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-12-15 21:47:06,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:06,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207197482] [2021-12-15 21:47:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:06,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:06,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:06,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207197482] [2021-12-15 21:47:06,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207197482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:47:06,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:47:06,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:47:06,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521292506] [2021-12-15 21:47:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:47:06,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:47:06,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:47:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:47:06,487 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-15 21:47:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:06,510 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-15 21:47:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:47:06,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-12-15 21:47:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:06,512 INFO L225 Difference]: With dead ends: 23 [2021-12-15 21:47:06,512 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 21:47:06,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:47:06,515 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:06,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:47:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 21:47:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-15 21:47:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-15 21:47:06,518 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-15 21:47:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:06,519 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-15 21:47:06,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-12-15 21:47:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-15 21:47:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 21:47:06,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:06,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:06,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:47:06,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-12-15 21:47:06,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753661259] [2021-12-15 21:47:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:06,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753661259] [2021-12-15 21:47:06,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753661259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:06,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204778064] [2021-12-15 21:47:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:06,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:06,566 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) [2021-12-15 21:47:06,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:47:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:47:06,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:06,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:06,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204778064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:06,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:06,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-15 21:47:06,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887078378] [2021-12-15 21:47:06,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:06,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:47:06,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:47:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:47:06,782 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:06,846 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-15 21:47:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:47:06,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 21:47:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:06,847 INFO L225 Difference]: With dead ends: 45 [2021-12-15 21:47:06,847 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 21:47:06,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:47:06,848 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:06,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:47:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 21:47:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-12-15 21:47:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-15 21:47:06,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2021-12-15 21:47:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:06,852 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-15 21:47:06,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-15 21:47:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 21:47:06,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:06,853 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:06,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:07,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:07,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-12-15 21:47:07,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660174517] [2021-12-15 21:47:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:07,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:07,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:07,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660174517] [2021-12-15 21:47:07,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660174517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:07,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012017304] [2021-12-15 21:47:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:07,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:07,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:07,220 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) [2021-12-15 21:47:07,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:47:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 21:47:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:07,374 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 13 treesize of output 9 [2021-12-15 21:47:07,465 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 19 treesize of output 7 [2021-12-15 21:47:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:07,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:07,593 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 18 treesize of output 16 [2021-12-15 21:47:07,599 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 36 treesize of output 32 [2021-12-15 21:47:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012017304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:07,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:07,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2021-12-15 21:47:07,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747495647] [2021-12-15 21:47:07,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:07,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:47:07,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:47:07,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:47:07,726 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:07,869 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-15 21:47:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:47:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 21:47:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:07,871 INFO L225 Difference]: With dead ends: 37 [2021-12-15 21:47:07,871 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 21:47:07,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-12-15 21:47:07,873 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:07,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 109 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:47:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 21:47:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-12-15 21:47:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-15 21:47:07,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-12-15 21:47:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-15 21:47:07,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-15 21:47:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:47:07,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:07,884 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:07,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:08,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:08,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:08,098 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2021-12-15 21:47:08,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:08,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120397261] [2021-12-15 21:47:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:08,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:08,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120397261] [2021-12-15 21:47:08,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120397261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201571079] [2021-12-15 21:47:08,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:47:08,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:08,257 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) [2021-12-15 21:47:08,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:47:08,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:47:08,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 21:47:08,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:08,367 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 15 treesize of output 11 [2021-12-15 21:47:08,427 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:08,427 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:47:08,484 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 19 treesize of output 7 [2021-12-15 21:47:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:08,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:20,721 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 26 treesize of output 24 [2021-12-15 21:47:20,726 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 94 treesize of output 90 [2021-12-15 21:47:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:20,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201571079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:20,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-15 21:47:20,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211673848] [2021-12-15 21:47:20,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:20,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 21:47:20,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 21:47:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=433, Unknown=4, NotChecked=0, Total=506 [2021-12-15 21:47:20,882 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:21,178 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-12-15 21:47:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:47:21,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 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 17 [2021-12-15 21:47:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:21,179 INFO L225 Difference]: With dead ends: 50 [2021-12-15 21:47:21,179 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 21:47:21,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=157, Invalid=895, Unknown=4, NotChecked=0, Total=1056 [2021-12-15 21:47:21,180 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:21,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 145 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 174 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-15 21:47:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 21:47:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2021-12-15 21:47:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 21:47:21,184 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-15 21:47:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:21,184 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 21:47:21,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 21:47:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 21:47:21,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:21,185 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:21,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:21,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:21,386 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2021-12-15 21:47:21,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958081099] [2021-12-15 21:47:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:21,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:21,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958081099] [2021-12-15 21:47:21,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958081099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718503823] [2021-12-15 21:47:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:21,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:21,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:21,445 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) [2021-12-15 21:47:21,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:47:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:47:21,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:21,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:21,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718503823] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:21,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:21,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 21:47:21,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082041199] [2021-12-15 21:47:21,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:21,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:47:21,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:47:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:47:21,582 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:21,610 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-15 21:47:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 21:47:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-12-15 21:47:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:21,611 INFO L225 Difference]: With dead ends: 38 [2021-12-15 21:47:21,611 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 21:47:21,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:47:21,612 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:21,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:47:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 21:47:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-15 21:47:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-15 21:47:21,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-12-15 21:47:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:21,619 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-15 21:47:21,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-15 21:47:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 21:47:21,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:21,620 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:21,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:21,837 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 [2021-12-15 21:47:21,838 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2021-12-15 21:47:21,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:21,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976926241] [2021-12-15 21:47:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:21,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:21,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976926241] [2021-12-15 21:47:21,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976926241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034751608] [2021-12-15 21:47:21,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:47:21,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:21,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:21,894 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) [2021-12-15 21:47:21,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:47:21,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:47:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:21,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 21:47:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:22,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:22,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034751608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:22,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:22,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-15 21:47:22,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424675825] [2021-12-15 21:47:22,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:47:22,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:47:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:47:22,101 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:47:22,218 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-15 21:47:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:47:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 21:47:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:47:22,219 INFO L225 Difference]: With dead ends: 98 [2021-12-15 21:47:22,219 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 21:47:22,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-12-15 21:47:22,220 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 250 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:47:22,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 95 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:47:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 21:47:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2021-12-15 21:47:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-15 21:47:22,224 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2021-12-15 21:47:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:47:22,225 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-15 21:47:22,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:47:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-15 21:47:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 21:47:22,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:47:22,226 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:47:22,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:47:22,439 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 [2021-12-15 21:47:22,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:47:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:47:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2021-12-15 21:47:22,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:47:22,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931698158] [2021-12-15 21:47:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:47:22,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:47:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:47:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:22,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:47:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931698158] [2021-12-15 21:47:22,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931698158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:47:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036070860] [2021-12-15 21:47:22,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:47:22,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:47:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:47:22,616 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) [2021-12-15 21:47:22,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:47:22,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 21:47:22,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:47:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:47:22,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:47:22,727 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 15 treesize of output 11 [2021-12-15 21:47:22,790 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:22,790 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:47:22,839 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:47:22,839 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:47:22,907 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 19 treesize of output 7 [2021-12-15 21:47:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:47:22,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:47:57,847 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_42| (+ |v_ULTIMATE.start_main_~i~0#1_43| 1)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42|)))) (< |v_ULTIMATE.start_main_~i~0#1_43| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-15 21:47:57,874 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 34 treesize of output 32 [2021-12-15 21:47:57,878 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 214 treesize of output 210 [2021-12-15 21:47:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-15 21:47:58,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036070860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:47:58,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:47:58,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-15 21:47:58,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409814372] [2021-12-15 21:47:58,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:47:58,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:47:58,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:47:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:47:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=629, Unknown=24, NotChecked=52, Total=812 [2021-12-15 21:47:58,091 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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) [2021-12-15 21:48:00,122 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (<= |c_ULTIMATE.start_main_~k~0#1| 0) (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_42| (+ |v_ULTIMATE.start_main_~i~0#1_43| 1)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42|)))) (< |v_ULTIMATE.start_main_~i~0#1_43| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-12-15 21:48:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:48:00,367 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-12-15 21:48:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 21:48:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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 20 [2021-12-15 21:48:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:48:00,370 INFO L225 Difference]: With dead ends: 59 [2021-12-15 21:48:00,370 INFO L226 Difference]: Without dead ends: 57 [2021-12-15 21:48:00,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=271, Invalid=1118, Unknown=25, NotChecked=146, Total=1560 [2021-12-15 21:48:00,374 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:48:00,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 123 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 242 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-12-15 21:48:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-15 21:48:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-12-15 21:48:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-15 21:48:00,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2021-12-15 21:48:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:48:00,386 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-15 21:48:00,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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) [2021-12-15 21:48:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-15 21:48:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 21:48:00,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:48:00,387 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:48:00,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:48:00,606 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 [2021-12-15 21:48:00,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:48:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:48:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2021-12-15 21:48:00,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:48:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74294585] [2021-12-15 21:48:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:48:00,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:48:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:48:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:00,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:48:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74294585] [2021-12-15 21:48:00,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74294585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:48:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360375579] [2021-12-15 21:48:00,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:48:00,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:48:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:48:00,767 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) [2021-12-15 21:48:00,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:48:00,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:48:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:48:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 21:48:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:48:00,921 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 15 treesize of output 11 [2021-12-15 21:48:01,075 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-12-15 21:48:01,075 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 21 treesize of output 10 [2021-12-15 21:48:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:01,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:48:01,267 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 20 treesize of output 18 [2021-12-15 21:48:01,270 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 42 treesize of output 36 [2021-12-15 21:48:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:01,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360375579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:48:01,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:48:01,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-15 21:48:01,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229469808] [2021-12-15 21:48:01,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:48:01,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:48:01,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:48:01,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:48:01,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:48:01,484 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:48:01,685 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-12-15 21:48:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:48:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 21:48:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:48:01,686 INFO L225 Difference]: With dead ends: 54 [2021-12-15 21:48:01,686 INFO L226 Difference]: Without dead ends: 42 [2021-12-15 21:48:01,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 21:48:01,687 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:48:01,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 104 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 228 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-15 21:48:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-15 21:48:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-15 21:48:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-15 21:48:01,690 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-12-15 21:48:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:48:01,690 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-15 21:48:01,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-15 21:48:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:48:01,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:48:01,691 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:48:01,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:48:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:48:01,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:48:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:48:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2021-12-15 21:48:01,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:48:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239152637] [2021-12-15 21:48:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:48:01,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:48:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:48:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:02,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:48:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239152637] [2021-12-15 21:48:02,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239152637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:48:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598065725] [2021-12-15 21:48:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:48:02,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:48:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:48:02,118 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) [2021-12-15 21:48:02,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:48:02,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 21:48:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:48:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 21:48:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:48:02,282 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 15 treesize of output 11 [2021-12-15 21:48:02,351 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:48:02,351 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:48:02,455 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 19 treesize of output 7 [2021-12-15 21:48:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:02,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:48:16,652 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 26 treesize of output 24 [2021-12-15 21:48:16,655 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 94 treesize of output 90 [2021-12-15 21:48:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:16,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598065725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:48:16,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:48:16,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2021-12-15 21:48:16,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463177339] [2021-12-15 21:48:16,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:48:16,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 21:48:16,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:48:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 21:48:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=878, Unknown=6, NotChecked=0, Total=992 [2021-12-15 21:48:16,901 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:48:17,237 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-12-15 21:48:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:48:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 21:48:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:48:17,238 INFO L225 Difference]: With dead ends: 60 [2021-12-15 21:48:17,238 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 21:48:17,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=184, Invalid=1370, Unknown=6, NotChecked=0, Total=1560 [2021-12-15 21:48:17,239 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:48:17,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 173 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 317 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-12-15 21:48:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 21:48:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-12-15 21:48:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-15 21:48:17,245 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2021-12-15 21:48:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:48:17,246 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-15 21:48:17,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:48:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-15 21:48:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:48:17,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:48:17,248 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:48:17,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:48:17,451 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,SelfDestructingSolverStorable10 [2021-12-15 21:48:17,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:48:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:48:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 4 times [2021-12-15 21:48:17,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:48:17,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657535356] [2021-12-15 21:48:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:48:17,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:48:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:48:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:17,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:48:17,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657535356] [2021-12-15 21:48:17,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657535356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:48:17,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928575150] [2021-12-15 21:48:17,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:48:17,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:48:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:48:17,631 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) [2021-12-15 21:48:17,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:48:17,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:48:17,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:48:17,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 21:48:17,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:48:17,791 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 15 treesize of output 11 [2021-12-15 21:48:17,848 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:48:17,848 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:48:17,908 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:48:17,908 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:48:18,047 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 19 treesize of output 7 [2021-12-15 21:48:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:48:18,073 INFO L328 TraceCheckSpWp]: Computing backward predicates...