./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_ind.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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:08:12,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:08:12,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:08:12,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:08:12,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:08:12,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:08:12,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:08:12,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:08:12,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:08:12,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:08:12,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:08:12,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:08:12,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:08:12,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:08:12,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:08:12,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:08:12,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:08:12,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:08:12,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:08:12,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:08:12,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:08:12,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:08:12,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:08:12,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:08:12,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:08:12,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:08:12,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:08:12,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:08:12,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:08:12,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:08:12,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:08:12,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:08:12,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:08:12,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:08:12,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:08:12,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:08:12,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:08:12,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:08:12,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:08:12,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:08:12,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:08:12,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:08:12,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:08:12,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:08:12,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:08:12,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:08:12,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:08:12,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:08:12,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:08:12,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:08:12,726 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:08:12,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:08:12,731 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:08:12,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:08:12,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:08:12,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:08:12,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:08:12,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:08:12,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:08:12,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:08:12,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:08:12,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:08:12,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:08:12,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2021-12-21 10:08:12,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:08:13,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:08:13,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:08:13,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:08:13,008 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:08:13,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2021-12-21 10:08:13,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d88e1bb/45967a2a4db741da822747ef63baee26/FLAGe14063e95 [2021-12-21 10:08:13,403 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:08:13,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2021-12-21 10:08:13,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d88e1bb/45967a2a4db741da822747ef63baee26/FLAGe14063e95 [2021-12-21 10:08:13,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d88e1bb/45967a2a4db741da822747ef63baee26 [2021-12-21 10:08:13,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:08:13,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:08:13,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:08:13,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:08:13,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:08:13,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e57f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13, skipping insertion in model container [2021-12-21 10:08:13,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:08:13,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:08:13,607 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_ind.c[414,427] [2021-12-21 10:08:13,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:08:13,626 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:08:13,636 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_ind.c[414,427] [2021-12-21 10:08:13,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:08:13,651 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:08:13,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13 WrapperNode [2021-12-21 10:08:13,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:08:13,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:08:13,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:08:13,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:08:13,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,675 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-12-21 10:08:13,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:08:13,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:08:13,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:08:13,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:08:13,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:08:13,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:08:13,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:08:13,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:08:13,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (1/1) ... [2021-12-21 10:08:13,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:08:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:13,749 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) [2021-12-21 10:08:13,770 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 [2021-12-21 10:08:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:08:13,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:08:13,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:08:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:08:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:08:13,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:08:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:08:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:08:13,832 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:08:13,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:08:13,906 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:08:13,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:08:13,910 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 10:08:13,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:08:13 BoogieIcfgContainer [2021-12-21 10:08:13,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:08:13,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:08:13,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:08:13,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:08:13,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:08:13" (1/3) ... [2021-12-21 10:08:13,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a265a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:08:13, skipping insertion in model container [2021-12-21 10:08:13,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:08:13" (2/3) ... [2021-12-21 10:08:13,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a265a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:08:13, skipping insertion in model container [2021-12-21 10:08:13,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:08:13" (3/3) ... [2021-12-21 10:08:13,917 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2021-12-21 10:08:13,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:08:13,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:08:13,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:08:13,978 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 [2021-12-21 10:08:13,979 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:08:13,987 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) [2021-12-21 10:08:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 10:08:14,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:14,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:14,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-12-21 10:08:14,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:14,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946120919] [2021-12-21 10:08:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:14,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946120919] [2021-12-21 10:08:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946120919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:08:14,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:08:14,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:08:14,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132305388] [2021-12-21 10:08:14,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:08:14,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:08:14,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:08:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:08:14,207 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) [2021-12-21 10:08:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:14,219 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-21 10:08:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:08:14,221 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 [2021-12-21 10:08:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:14,226 INFO L225 Difference]: With dead ends: 27 [2021-12-21 10:08:14,227 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 10:08:14,229 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 [2021-12-21 10:08:14,233 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 [2021-12-21 10:08:14,235 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] [2021-12-21 10:08:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 10:08:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 10:08:14,257 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) [2021-12-21 10:08:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-21 10:08:14,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-12-21 10:08:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:14,259 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-21 10:08:14,259 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) [2021-12-21 10:08:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-21 10:08:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 10:08:14,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:14,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:08:14,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-12-21 10:08:14,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:14,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484443671] [2021-12-21 10:08:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484443671] [2021-12-21 10:08:14,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484443671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:08:14,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:08:14,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:08:14,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528261702] [2021-12-21 10:08:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:08:14,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:08:14,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:08:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:08:14,378 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) [2021-12-21 10:08:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:14,406 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-21 10:08:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:08:14,407 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 [2021-12-21 10:08:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:14,408 INFO L225 Difference]: With dead ends: 29 [2021-12-21 10:08:14,408 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 10:08:14,411 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 [2021-12-21 10:08:14,413 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 [2021-12-21 10:08:14,415 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] [2021-12-21 10:08:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 10:08:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-12-21 10:08:14,421 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) [2021-12-21 10:08:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-21 10:08:14,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-12-21 10:08:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:14,423 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-21 10:08:14,424 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) [2021-12-21 10:08:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-21 10:08:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 10:08:14,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:14,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:14,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:08:14,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-12-21 10:08:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:14,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468535101] [2021-12-21 10:08:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468535101] [2021-12-21 10:08:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468535101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:08:14,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:08:14,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:08:14,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349982856] [2021-12-21 10:08:14,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:08:14,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:08:14,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:14,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:08:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:08:14,492 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) [2021-12-21 10:08:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:14,515 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-21 10:08:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:08:14,516 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 [2021-12-21 10:08:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:14,517 INFO L225 Difference]: With dead ends: 23 [2021-12-21 10:08:14,517 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 10:08:14,518 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 [2021-12-21 10:08:14,521 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 [2021-12-21 10:08:14,523 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] [2021-12-21 10:08:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 10:08:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-21 10:08:14,527 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) [2021-12-21 10:08:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-21 10:08:14,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-21 10:08:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:14,528 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-21 10:08:14,528 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) [2021-12-21 10:08:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-21 10:08:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 10:08:14,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:14,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:14,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:08:14,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-12-21 10:08:14,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:14,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811063750] [2021-12-21 10:08:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:14,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811063750] [2021-12-21 10:08:14,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811063750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:14,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16126373] [2021-12-21 10:08:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:14,587 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) [2021-12-21 10:08:14,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:08:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:08:14,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16126373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:14,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:14,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-21 10:08:14,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785368724] [2021-12-21 10:08:14,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:14,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:08:14,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:08:14,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:14,800 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) [2021-12-21 10:08:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:14,878 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-21 10:08:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:08:14,878 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 [2021-12-21 10:08:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:14,879 INFO L225 Difference]: With dead ends: 45 [2021-12-21 10:08:14,879 INFO L226 Difference]: Without dead ends: 36 [2021-12-21 10:08:14,880 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 [2021-12-21 10:08:14,880 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 [2021-12-21 10:08:14,880 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] [2021-12-21 10:08:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-21 10:08:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-12-21 10:08:14,883 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) [2021-12-21 10:08:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-21 10:08:14,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2021-12-21 10:08:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:14,884 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-21 10:08:14,885 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) [2021-12-21 10:08:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-21 10:08:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 10:08:14,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:14,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:14,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 10:08:15,107 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 [2021-12-21 10:08:15,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2021-12-21 10:08:15,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:15,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128289208] [2021-12-21 10:08:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:15,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:15,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128289208] [2021-12-21 10:08:15,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128289208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032792373] [2021-12-21 10:08:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:15,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:15,264 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) [2021-12-21 10:08:15,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:08:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 10:08:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:15,363 INFO L387 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 [2021-12-21 10:08:15,410 INFO L387 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 [2021-12-21 10:08:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:15,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:15,469 INFO L387 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 16 treesize of output 14 [2021-12-21 10:08:15,472 INFO L387 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 32 treesize of output 28 [2021-12-21 10:08:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:15,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032792373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:15,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:15,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2021-12-21 10:08:15,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374616477] [2021-12-21 10:08:15,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:15,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:08:15,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:08:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:15,529 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:15,615 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-21 10:08:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:08:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 10:08:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:15,616 INFO L225 Difference]: With dead ends: 37 [2021-12-21 10:08:15,616 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 10:08:15,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:15,617 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:15,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 63 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 10:08:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-12-21 10:08:15,620 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) [2021-12-21 10:08:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-21 10:08:15,621 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-12-21 10:08:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:15,621 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-21 10:08:15,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-21 10:08:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 10:08:15,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:15,622 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:15,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:08:15,839 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 [2021-12-21 10:08:15,839 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2021-12-21 10:08:15,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:15,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195940889] [2021-12-21 10:08:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:15,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:15,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:15,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195940889] [2021-12-21 10:08:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195940889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:15,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166178830] [2021-12-21 10:08:15,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:15,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:15,966 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) [2021-12-21 10:08:15,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:08:16,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:16,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:16,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 10:08:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:16,064 INFO L387 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 [2021-12-21 10:08:16,108 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:16,108 INFO L387 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 [2021-12-21 10:08:16,151 INFO L387 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 [2021-12-21 10:08:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:16,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:18,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_21| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_21|)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (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_21| 4)) v_ArrVal_48) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) is different from false [2021-12-21 10:08:18,279 INFO L387 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 23 treesize of output 21 [2021-12-21 10:08:18,283 INFO L387 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 82 treesize of output 78 [2021-12-21 10:08:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-21 10:08:18,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166178830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:18,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-21 10:08:18,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696718240] [2021-12-21 10:08:18,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 10:08:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 10:08:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=254, Unknown=1, NotChecked=32, Total=342 [2021-12-21 10:08:18,379 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-12-21 10:08:20,407 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (= (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|)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_21| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_21|)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (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_21| 4)) v_ArrVal_48) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (<= |c_ULTIMATE.start_main_~i~0#1| 1) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-12-21 10:08:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:20,518 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-12-21 10:08:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:08:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 [2021-12-21 10:08:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:20,519 INFO L225 Difference]: With dead ends: 43 [2021-12-21 10:08:20,519 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 10:08:20,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=115, Invalid=443, Unknown=2, NotChecked=90, Total=650 [2021-12-21 10:08:20,520 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:20,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2021-12-21 10:08:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 10:08:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-12-21 10:08:20,523 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) [2021-12-21 10:08:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 10:08:20,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-21 10:08:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:20,523 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 10:08:20,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-12-21 10:08:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 10:08:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 10:08:20,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:20,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:20,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:20,741 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 [2021-12-21 10:08:20,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:20,742 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2021-12-21 10:08:20,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:20,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924809827] [2021-12-21 10:08:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:20,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:20,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924809827] [2021-12-21 10:08:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924809827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54095653] [2021-12-21 10:08:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:20,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:20,826 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) [2021-12-21 10:08:20,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:08:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:08:20,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:20,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54095653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:20,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:20,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:08:20,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089445158] [2021-12-21 10:08:20,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:20,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:08:20,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:08:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:20,999 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) [2021-12-21 10:08:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:21,036 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-21 10:08:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:08:21,037 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 [2021-12-21 10:08:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:21,040 INFO L225 Difference]: With dead ends: 38 [2021-12-21 10:08:21,040 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 10:08:21,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:08:21,041 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:21,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:08:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 10:08:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-21 10:08:21,046 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) [2021-12-21 10:08:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-21 10:08:21,047 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-12-21 10:08:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:21,047 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-21 10:08:21,048 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) [2021-12-21 10:08:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-21 10:08:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 10:08:21,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:21,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:21,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:21,263 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 [2021-12-21 10:08:21,263 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2021-12-21 10:08:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791414711] [2021-12-21 10:08:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:21,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:21,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791414711] [2021-12-21 10:08:21,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791414711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943018202] [2021-12-21 10:08:21,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:21,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:21,332 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) [2021-12-21 10:08:21,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:08:21,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:21,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 10:08:21,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:21,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:21,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943018202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:21,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:21,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-21 10:08:21,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386105749] [2021-12-21 10:08:21,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:21,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 10:08:21,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 10:08:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:08:21,547 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) [2021-12-21 10:08:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:21,660 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-21 10:08:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:08:21,661 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 [2021-12-21 10:08:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:21,661 INFO L225 Difference]: With dead ends: 98 [2021-12-21 10:08:21,661 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 10:08:21,662 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 [2021-12-21 10:08:21,662 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 234 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:21,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 102 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 10:08:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2021-12-21 10:08:21,667 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) [2021-12-21 10:08:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-21 10:08:21,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2021-12-21 10:08:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:21,668 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-21 10:08:21,668 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) [2021-12-21 10:08:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-21 10:08:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:08:21,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:21,676 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:21,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:21,909 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 [2021-12-21 10:08:21,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2021-12-21 10:08:21,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073803962] [2021-12-21 10:08:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:21,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:22,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073803962] [2021-12-21 10:08:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073803962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240094342] [2021-12-21 10:08:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:08:22,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:22,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:22,029 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) [2021-12-21 10:08:22,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:08:22,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:08:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 10:08:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:22,134 INFO L387 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 [2021-12-21 10:08:22,167 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:22,168 INFO L387 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 [2021-12-21 10:08:22,226 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:22,226 INFO L387 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 [2021-12-21 10:08:22,252 INFO L387 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 [2021-12-21 10:08:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:22,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:22,374 INFO L387 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 21 treesize of output 19 [2021-12-21 10:08:22,377 INFO L387 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 37 treesize of output 33 [2021-12-21 10:08:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:08:22,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240094342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:22,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:22,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-21 10:08:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539106228] [2021-12-21 10:08:22,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:22,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 10:08:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 10:08:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:22,428 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:22,544 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-21 10:08:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:08:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:08:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:22,546 INFO L225 Difference]: With dead ends: 50 [2021-12-21 10:08:22,546 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 10:08:22,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:08:22,548 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:22,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 10:08:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-12-21 10:08:22,553 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) [2021-12-21 10:08:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-21 10:08:22,555 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2021-12-21 10:08:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:22,556 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-21 10:08:22,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-21 10:08:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 10:08:22,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:22,557 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:22,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:22,774 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 [2021-12-21 10:08:22,774 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2021-12-21 10:08:22,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639178896] [2021-12-21 10:08:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:22,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:22,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:22,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639178896] [2021-12-21 10:08:22,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639178896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:22,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743449110] [2021-12-21 10:08:22,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:22,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:22,936 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) [2021-12-21 10:08:22,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:08:23,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:23,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 10:08:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:23,088 INFO L387 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 [2021-12-21 10:08:23,221 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-21 10:08:23,222 INFO L387 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 23 treesize of output 10 [2021-12-21 10:08:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:23,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:23,403 INFO L387 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 [2021-12-21 10:08:23,406 INFO L387 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 38 treesize of output 32 [2021-12-21 10:08:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743449110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:23,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:23,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2021-12-21 10:08:23,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715871259] [2021-12-21 10:08:23,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:23,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 10:08:23,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 10:08:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-12-21 10:08:23,577 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-12-21 10:08:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:23,657 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-21 10:08:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:08:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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 [2021-12-21 10:08:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:23,670 INFO L225 Difference]: With dead ends: 53 [2021-12-21 10:08:23,670 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 10:08:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-12-21 10:08:23,671 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-21 10:08:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 10:08:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 10:08:23,675 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) [2021-12-21 10:08:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-21 10:08:23,676 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-12-21 10:08:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:23,676 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-21 10:08:23,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-12-21 10:08:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-21 10:08:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 10:08:23,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:23,677 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:23,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:23,887 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 [2021-12-21 10:08:23,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2021-12-21 10:08:23,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:23,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952690250] [2021-12-21 10:08:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:23,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:24,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952690250] [2021-12-21 10:08:24,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952690250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701227378] [2021-12-21 10:08:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:08:24,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:24,039 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) [2021-12-21 10:08:24,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:08:24,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:08:24,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 10:08:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:24,177 INFO L387 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 [2021-12-21 10:08:24,213 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:08:24,213 INFO L387 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 23 treesize of output 22 [2021-12-21 10:08:24,289 INFO L387 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 [2021-12-21 10:08:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:24,445 INFO L387 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 24 treesize of output 22 [2021-12-21 10:08:24,462 INFO L387 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 192 treesize of output 184 [2021-12-21 10:08:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:24,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701227378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:24,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:24,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-12-21 10:08:24,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925998232] [2021-12-21 10:08:24,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:24,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 10:08:24,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 10:08:24,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-12-21 10:08:24,587 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) [2021-12-21 10:08:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:24,809 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-12-21 10:08:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 10:08:24,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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 [2021-12-21 10:08:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:24,810 INFO L225 Difference]: With dead ends: 66 [2021-12-21 10:08:24,810 INFO L226 Difference]: Without dead ends: 64 [2021-12-21 10:08:24,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 10:08:24,811 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:24,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 145 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 327 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-12-21 10:08:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-21 10:08:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2021-12-21 10:08:24,815 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) [2021-12-21 10:08:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-21 10:08:24,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2021-12-21 10:08:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:24,816 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-21 10:08:24,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) [2021-12-21 10:08:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-21 10:08:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 10:08:24,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:24,817 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:24,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-21 10:08:25,027 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 [2021-12-21 10:08:25,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 4 times [2021-12-21 10:08:25,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261263221] [2021-12-21 10:08:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:25,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:25,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261263221] [2021-12-21 10:08:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261263221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337174669] [2021-12-21 10:08:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:08:25,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:25,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:25,309 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) [2021-12-21 10:08:25,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:08:25,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:08:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 10:08:25,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:25,471 INFO L387 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 [2021-12-21 10:08:25,575 INFO L387 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 [2021-12-21 10:08:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:25,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:25,692 INFO L387 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 16 treesize of output 14 [2021-12-21 10:08:25,694 INFO L387 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 32 treesize of output 28 [2021-12-21 10:08:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:25,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337174669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:25,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:08:25,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2021-12-21 10:08:25,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091729396] [2021-12-21 10:08:25,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:25,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 10:08:25,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 10:08:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 10:08:25,888 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2021-12-21 10:08:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:26,194 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-12-21 10:08:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 10:08:26,195 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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 28 [2021-12-21 10:08:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:26,195 INFO L225 Difference]: With dead ends: 64 [2021-12-21 10:08:26,195 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 10:08:26,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 10:08:26,196 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:26,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 197 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 340 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2021-12-21 10:08:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 10:08:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-21 10:08:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:08:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-21 10:08:26,200 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2021-12-21 10:08:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:26,200 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-21 10:08:26,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2021-12-21 10:08:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-21 10:08:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 10:08:26,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:26,201 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:26,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:26,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:26,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 13772134, now seen corresponding path program 5 times [2021-12-21 10:08:26,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623330819] [2021-12-21 10:08:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:26,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:26,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623330819] [2021-12-21 10:08:26,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623330819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542008305] [2021-12-21 10:08:26,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:08:26,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:26,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:26,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:08:26,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:08:26,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-21 10:08:26,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:26,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 10:08:26,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:26,697 INFO L387 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 [2021-12-21 10:08:26,732 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:26,733 INFO L387 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 [2021-12-21 10:08:26,754 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:26,754 INFO L387 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 [2021-12-21 10:08:26,788 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:08:26,789 INFO L387 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 [2021-12-21 10:08:26,848 INFO L387 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 [2021-12-21 10:08:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:28,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_75| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_75|)) (forall ((v_ArrVal_205 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_75| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_205) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))))) is different from false [2021-12-21 10:09:33,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_77| Int)) (or (forall ((v_ArrVal_203 Int) (v_ArrVal_202 Int) (|v_ULTIMATE.start_main_~i~0#1_76| Int) (|v_ULTIMATE.start_main_~i~0#1_75| Int) (v_ArrVal_205 Int)) (or (<= 0 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_77| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_202) (+ (* |v_ULTIMATE.start_main_~i~0#1_76| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_203) (+ (* |v_ULTIMATE.start_main_~i~0#1_75| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_205) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_76| 1) |v_ULTIMATE.start_main_~i~0#1_75|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_77| 1) |v_ULTIMATE.start_main_~i~0#1_76|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_77|)))) is different from false [2021-12-21 10:09:33,576 INFO L387 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 37 treesize of output 35 [2021-12-21 10:09:33,580 INFO L387 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 382 treesize of output 378 [2021-12-21 10:09:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-21 10:09:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542008305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:09:33,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:09:33,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 30 [2021-12-21 10:09:33,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232653739] [2021-12-21 10:09:33,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:09:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 10:09:33,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:09:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 10:09:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=611, Unknown=43, NotChecked=106, Total=870 [2021-12-21 10:09:33,890 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 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)