./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:25:31,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:25:31,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:25:31,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:25:31,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:25:31,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:25:31,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:25:31,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:25:31,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:25:31,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:25:31,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:25:31,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:25:31,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:25:31,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:25:31,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:25:31,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:25:31,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:25:31,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:25:31,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:25:31,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:25:31,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:25:31,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:25:31,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:25:31,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:25:31,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:25:31,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:25:31,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:25:31,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:25:31,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:25:31,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:25:31,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:25:31,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:25:31,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:25:31,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:25:31,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:25:31,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:25:31,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:25:31,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:25:31,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:25:31,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:25:31,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:25:31,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:25:31,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:25:31,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:25:31,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:25:31,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:25:31,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:25:31,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:25:31,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:25:31,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:25:31,564 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:25:31,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:25:31,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:25:31,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:25:31,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:25:31,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:25:31,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:25:31,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:25:31,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:25:31,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:25:31,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:25:31,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:25:31,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:25:31,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:25:31,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:25:31,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:25:31,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:25:31,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:25:31,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:25:31,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:25:31,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:25:31,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:25:31,568 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:25:31,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:25:31,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:25:31,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:25:31,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2021-12-22 10:25:31,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:25:31,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:25:31,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:25:31,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:25:31,723 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:25:31,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-12-22 10:25:31,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b537d566/2fe3efe2b84c4f4e9d4dd966539b3904/FLAG103ece5fd [2021-12-22 10:25:32,284 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:25:32,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-12-22 10:25:32,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b537d566/2fe3efe2b84c4f4e9d4dd966539b3904/FLAG103ece5fd [2021-12-22 10:25:32,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b537d566/2fe3efe2b84c4f4e9d4dd966539b3904 [2021-12-22 10:25:32,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:25:32,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:25:32,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:25:32,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:25:32,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:25:32,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:32" (1/1) ... [2021-12-22 10:25:32,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1f4883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:32, skipping insertion in model container [2021-12-22 10:25:32,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:32" (1/1) ... [2021-12-22 10:25:32,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:25:32,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:25:33,060 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-12-22 10:25:33,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:33,103 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:25:33,121 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-12-22 10:25:33,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:33,159 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:25:33,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33 WrapperNode [2021-12-22 10:25:33,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:25:33,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:25:33,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:25:33,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:25:33,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,206 INFO L137 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 285 [2021-12-22 10:25:33,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:25:33,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:25:33,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:25:33,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:25:33,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:25:33,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:25:33,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:25:33,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:25:33,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:25:33,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:33,275 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) [2021-12-22 10:25:33,294 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 [2021-12-22 10:25:33,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 10:25:33,305 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-12-22 10:25:33,305 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-22 10:25:33,306 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 10:25:33,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 10:25:33,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:25:33,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:25:33,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:25:33,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:25:33,395 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:25:33,402 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:25:33,684 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:25:33,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:25:33,689 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-22 10:25:33,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:33 BoogieIcfgContainer [2021-12-22 10:25:33,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:25:33,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:25:33,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:25:33,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:25:33,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:32" (1/3) ... [2021-12-22 10:25:33,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c316232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:33, skipping insertion in model container [2021-12-22 10:25:33,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (2/3) ... [2021-12-22 10:25:33,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c316232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:33, skipping insertion in model container [2021-12-22 10:25:33,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:33" (3/3) ... [2021-12-22 10:25:33,705 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2021-12-22 10:25:33,709 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:25:33,709 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:25:33,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:25:33,752 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 [2021-12-22 10:25:33,752 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:25:33,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 93 states have internal predecessors, (139), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 10:25:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 10:25:33,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:33,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:33,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2117458630, now seen corresponding path program 1 times [2021-12-22 10:25:33,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:33,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642564549] [2021-12-22 10:25:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:33,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:33,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:33,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642564549] [2021-12-22 10:25:33,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642564549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:33,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:33,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:25:33,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675738644] [2021-12-22 10:25:33,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:33,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:25:33,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:25:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:25:33,931 INFO L87 Difference]: Start difference. First operand has 96 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 93 states have internal predecessors, (139), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:33,964 INFO L93 Difference]: Finished difference Result 188 states and 335 transitions. [2021-12-22 10:25:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:25:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 10:25:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:33,976 INFO L225 Difference]: With dead ends: 188 [2021-12-22 10:25:33,976 INFO L226 Difference]: Without dead ends: 87 [2021-12-22 10:25:33,979 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 [2021-12-22 10:25:33,981 INFO L933 BasicCegarLoop]: 119 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, 119 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 [2021-12-22 10:25:33,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-22 10:25:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-22 10:25:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 84 states have internal predecessors, (93), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2021-12-22 10:25:34,023 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 7 [2021-12-22 10:25:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,023 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2021-12-22 10:25:34,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2021-12-22 10:25:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 10:25:34,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:25:34,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 592840654, now seen corresponding path program 1 times [2021-12-22 10:25:34,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573242850] [2021-12-22 10:25:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:34,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573242850] [2021-12-22 10:25:34,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573242850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 10:25:34,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581661239] [2021-12-22 10:25:34,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 10:25:34,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 10:25:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:25:34,089 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,118 INFO L93 Difference]: Finished difference Result 172 states and 218 transitions. [2021-12-22 10:25:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 10:25:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 10:25:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,120 INFO L225 Difference]: With dead ends: 172 [2021-12-22 10:25:34,120 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 10:25:34,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:25:34,126 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 10:25:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-12-22 10:25:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 86 states have internal predecessors, (95), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-12-22 10:25:34,143 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 8 [2021-12-22 10:25:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,144 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-12-22 10:25:34,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-12-22 10:25:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:25:34,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,146 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:25:34,146 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1362713673, now seen corresponding path program 1 times [2021-12-22 10:25:34,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506146967] [2021-12-22 10:25:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:34,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:34,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506146967] [2021-12-22 10:25:34,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506146967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:25:34,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578063927] [2021-12-22 10:25:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:25:34,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:25:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:25:34,246 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,362 INFO L93 Difference]: Finished difference Result 235 states and 308 transitions. [2021-12-22 10:25:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:25:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-22 10:25:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,366 INFO L225 Difference]: With dead ends: 235 [2021-12-22 10:25:34,367 INFO L226 Difference]: Without dead ends: 230 [2021-12-22 10:25:34,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:25:34,369 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 516 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 276 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-22 10:25:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 92. [2021-12-22 10:25:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 89 states have internal predecessors, (99), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2021-12-22 10:25:34,382 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 14 [2021-12-22 10:25:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,383 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2021-12-22 10:25:34,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2021-12-22 10:25:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 10:25:34,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,384 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:25:34,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1343418310, now seen corresponding path program 1 times [2021-12-22 10:25:34,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056057428] [2021-12-22 10:25:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:34,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:34,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056057428] [2021-12-22 10:25:34,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056057428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:25:34,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626349881] [2021-12-22 10:25:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:25:34,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:25:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:25:34,486 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,589 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-12-22 10:25:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:25:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 10:25:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,592 INFO L225 Difference]: With dead ends: 94 [2021-12-22 10:25:34,592 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 10:25:34,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:34,592 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 11 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 319 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 10:25:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-22 10:25:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 88 states have internal predecessors, (98), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2021-12-22 10:25:34,598 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 21 [2021-12-22 10:25:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,598 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2021-12-22 10:25:34,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2021-12-22 10:25:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 10:25:34,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 10:25:34,599 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1668834300, now seen corresponding path program 1 times [2021-12-22 10:25:34,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:34,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867069874] [2021-12-22 10:25:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:34,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867069874] [2021-12-22 10:25:34,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867069874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:25:34,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926692227] [2021-12-22 10:25:34,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:25:34,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:25:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:25:34,672 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,779 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-12-22 10:25:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:25:34,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 10:25:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,780 INFO L225 Difference]: With dead ends: 118 [2021-12-22 10:25:34,780 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 10:25:34,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:34,781 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 38 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 284 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 10:25:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2021-12-22 10:25:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 87 states have internal predecessors, (97), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2021-12-22 10:25:34,787 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 21 [2021-12-22 10:25:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,787 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2021-12-22 10:25:34,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2021-12-22 10:25:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 10:25:34,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,787 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 10:25:34,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1088949266, now seen corresponding path program 1 times [2021-12-22 10:25:34,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722009122] [2021-12-22 10:25:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:34,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722009122] [2021-12-22 10:25:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722009122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:25:34,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163983642] [2021-12-22 10:25:34,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:25:34,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:25:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:34,835 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,986 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2021-12-22 10:25:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:25:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-22 10:25:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,988 INFO L225 Difference]: With dead ends: 195 [2021-12-22 10:25:34,988 INFO L226 Difference]: Without dead ends: 192 [2021-12-22 10:25:34,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 10:25:34,989 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 348 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 283 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-22 10:25:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 96. [2021-12-22 10:25:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 93 states have internal predecessors, (103), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2021-12-22 10:25:34,996 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 24 [2021-12-22 10:25:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,996 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2021-12-22 10:25:34,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2021-12-22 10:25:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 10:25:34,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,997 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 10:25:34,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1875885747, now seen corresponding path program 1 times [2021-12-22 10:25:34,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909837488] [2021-12-22 10:25:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:35,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:35,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909837488] [2021-12-22 10:25:35,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909837488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:35,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:35,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:25:35,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233364964] [2021-12-22 10:25:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:35,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:25:35,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:25:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:35,047 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:35,209 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2021-12-22 10:25:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:25:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-22 10:25:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:35,211 INFO L225 Difference]: With dead ends: 194 [2021-12-22 10:25:35,211 INFO L226 Difference]: Without dead ends: 191 [2021-12-22 10:25:35,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 10:25:35,211 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 345 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:35,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 283 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-22 10:25:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 102. [2021-12-22 10:25:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 99 states have internal predecessors, (109), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2021-12-22 10:25:35,218 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 24 [2021-12-22 10:25:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:35,218 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2021-12-22 10:25:35,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2021-12-22 10:25:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 10:25:35,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:35,219 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:35,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 10:25:35,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash 833312563, now seen corresponding path program 1 times [2021-12-22 10:25:35,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:35,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623131511] [2021-12-22 10:25:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:35,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:35,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623131511] [2021-12-22 10:25:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623131511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:35,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:35,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 10:25:35,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970395390] [2021-12-22 10:25:35,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:35,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:25:35,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:25:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:25:35,289 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:35,572 INFO L93 Difference]: Finished difference Result 264 states and 335 transitions. [2021-12-22 10:25:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 10:25:35,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 10:25:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:35,573 INFO L225 Difference]: With dead ends: 264 [2021-12-22 10:25:35,573 INFO L226 Difference]: Without dead ends: 261 [2021-12-22 10:25:35,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:25:35,574 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 527 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:35,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 331 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-22 10:25:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 105. [2021-12-22 10:25:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 102 states have internal predecessors, (112), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-12-22 10:25:35,582 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 27 [2021-12-22 10:25:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:35,583 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-12-22 10:25:35,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-12-22 10:25:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 10:25:35,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:35,584 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:35,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 10:25:35,584 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1708085367, now seen corresponding path program 1 times [2021-12-22 10:25:35,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:35,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302172255] [2021-12-22 10:25:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:35,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:35,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302172255] [2021-12-22 10:25:35,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302172255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:35,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:35,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 10:25:35,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410361750] [2021-12-22 10:25:35,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:35,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:25:35,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:25:35,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:25:35,653 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:35,929 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2021-12-22 10:25:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 10:25:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-22 10:25:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:35,930 INFO L225 Difference]: With dead ends: 263 [2021-12-22 10:25:35,930 INFO L226 Difference]: Without dead ends: 260 [2021-12-22 10:25:35,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:25:35,931 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 523 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:35,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 331 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-22 10:25:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 108. [2021-12-22 10:25:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 105 states have internal predecessors, (115), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2021-12-22 10:25:35,938 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 27 [2021-12-22 10:25:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:35,939 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2021-12-22 10:25:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2021-12-22 10:25:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 10:25:35,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:35,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:35,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 10:25:35,940 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -399551200, now seen corresponding path program 1 times [2021-12-22 10:25:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120632025] [2021-12-22 10:25:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:35,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:36,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120632025] [2021-12-22 10:25:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120632025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256014416] [2021-12-22 10:25:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:36,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:36,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:36,025 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) [2021-12-22 10:25:36,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:25:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 10:25:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:36,250 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 31 treesize of output 19 [2021-12-22 10:25:36,253 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 25 treesize of output 13 [2021-12-22 10:25:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:36,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:25:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:36,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256014416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:25:36,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:25:36,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-22 10:25:36,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972282266] [2021-12-22 10:25:36,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:25:36,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:25:36,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:25:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:36,448 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:36,560 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-12-22 10:25:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:25:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-22 10:25:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:36,561 INFO L225 Difference]: With dead ends: 110 [2021-12-22 10:25:36,561 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 10:25:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:25:36,562 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 84 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:36,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 280 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 10:25:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-22 10:25:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.202127659574468) internal successors, (113), 103 states have internal predecessors, (113), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-12-22 10:25:36,568 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 32 [2021-12-22 10:25:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:36,569 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-12-22 10:25:36,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-12-22 10:25:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 10:25:36,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:36,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:36,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:36,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 10:25:36,785 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2096511860, now seen corresponding path program 1 times [2021-12-22 10:25:36,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:36,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889558829] [2021-12-22 10:25:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:36,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:36,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889558829] [2021-12-22 10:25:36,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889558829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:36,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:25:36,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780929826] [2021-12-22 10:25:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:25:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:25:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:36,826 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:36,870 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2021-12-22 10:25:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:25:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 10:25:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:36,872 INFO L225 Difference]: With dead ends: 146 [2021-12-22 10:25:36,872 INFO L226 Difference]: Without dead ends: 143 [2021-12-22 10:25:36,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:25:36,873 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 271 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:36,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 325 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-22 10:25:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2021-12-22 10:25:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 107 states have internal predecessors, (118), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2021-12-22 10:25:36,880 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 33 [2021-12-22 10:25:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:36,880 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2021-12-22 10:25:36,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2021-12-22 10:25:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 10:25:36,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:36,881 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:36,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 10:25:36,882 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash -236025208, now seen corresponding path program 1 times [2021-12-22 10:25:36,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:36,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205859091] [2021-12-22 10:25:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:36,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:36,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205859091] [2021-12-22 10:25:36,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205859091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953093404] [2021-12-22 10:25:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:37,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:37,001 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) [2021-12-22 10:25:37,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:25:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 10:25:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:37,288 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 15 treesize of output 7 [2021-12-22 10:25:37,292 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 15 treesize of output 7 [2021-12-22 10:25:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:37,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:25:37,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953093404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:37,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:25:37,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 12 [2021-12-22 10:25:37,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067206425] [2021-12-22 10:25:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:37,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 10:25:37,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 10:25:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:25:37,299 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:37,542 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2021-12-22 10:25:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 10:25:37,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-22 10:25:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:37,544 INFO L225 Difference]: With dead ends: 199 [2021-12-22 10:25:37,544 INFO L226 Difference]: Without dead ends: 196 [2021-12-22 10:25:37,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-22 10:25:37,544 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 344 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:37,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 521 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-22 10:25:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-12-22 10:25:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 116 states have internal predecessors, (128), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-12-22 10:25:37,554 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 36 [2021-12-22 10:25:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:37,555 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-12-22 10:25:37,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-12-22 10:25:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:25:37,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:37,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:37,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:37,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 10:25:37,771 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash -73182163, now seen corresponding path program 1 times [2021-12-22 10:25:37,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091281697] [2021-12-22 10:25:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:37,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 10:25:37,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:37,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091281697] [2021-12-22 10:25:37,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091281697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:37,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107470717] [2021-12-22 10:25:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:37,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:37,896 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) [2021-12-22 10:25:37,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:25:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:37,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 10:25:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:38,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:38,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:38,070 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 [2021-12-22 10:25:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 10:25:38,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:25:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 10:25:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107470717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:25:38,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:25:38,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2021-12-22 10:25:38,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402765264] [2021-12-22 10:25:38,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:25:38,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 10:25:38,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 10:25:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:25:38,199 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:38,442 INFO L93 Difference]: Finished difference Result 299 states and 366 transitions. [2021-12-22 10:25:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 10:25:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-22 10:25:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:38,443 INFO L225 Difference]: With dead ends: 299 [2021-12-22 10:25:38,443 INFO L226 Difference]: Without dead ends: 214 [2021-12-22 10:25:38,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-22 10:25:38,444 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 234 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:38,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 546 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-22 10:25:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 130. [2021-12-22 10:25:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.1864406779661016) internal successors, (140), 127 states have internal predecessors, (140), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2021-12-22 10:25:38,453 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 38 [2021-12-22 10:25:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:38,453 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2021-12-22 10:25:38,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2021-12-22 10:25:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:25:38,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:38,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:38,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 10:25:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:38,671 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash 490774160, now seen corresponding path program 1 times [2021-12-22 10:25:38,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:38,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131293565] [2021-12-22 10:25:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:38,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:38,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131293565] [2021-12-22 10:25:38,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131293565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:38,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:38,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:25:38,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085921206] [2021-12-22 10:25:38,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:38,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:25:38,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:25:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:38,713 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:38,777 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2021-12-22 10:25:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 10:25:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-22 10:25:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:38,778 INFO L225 Difference]: With dead ends: 238 [2021-12-22 10:25:38,778 INFO L226 Difference]: Without dead ends: 197 [2021-12-22 10:25:38,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-22 10:25:38,779 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 347 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:38,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 380 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-22 10:25:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 131. [2021-12-22 10:25:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.184873949579832) internal successors, (141), 128 states have internal predecessors, (141), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2021-12-22 10:25:38,788 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 38 [2021-12-22 10:25:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:38,788 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2021-12-22 10:25:38,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2021-12-22 10:25:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 10:25:38,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:38,789 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:38,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 10:25:38,789 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash -557560351, now seen corresponding path program 1 times [2021-12-22 10:25:38,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740226872] [2021-12-22 10:25:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:38,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:38,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740226872] [2021-12-22 10:25:38,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740226872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:38,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:38,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 10:25:38,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669476300] [2021-12-22 10:25:38,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:38,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:25:38,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:25:38,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:25:38,853 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:39,126 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2021-12-22 10:25:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 10:25:39,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-22 10:25:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:39,128 INFO L225 Difference]: With dead ends: 165 [2021-12-22 10:25:39,128 INFO L226 Difference]: Without dead ends: 162 [2021-12-22 10:25:39,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:25:39,128 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 239 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:39,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 331 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-22 10:25:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 137. [2021-12-22 10:25:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.184) internal successors, (148), 134 states have internal predecessors, (148), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2021-12-22 10:25:39,152 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 39 [2021-12-22 10:25:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:39,153 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2021-12-22 10:25:39,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2021-12-22 10:25:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 10:25:39,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:39,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:39,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 10:25:39,154 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1187191262, now seen corresponding path program 1 times [2021-12-22 10:25:39,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271532360] [2021-12-22 10:25:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:39,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:39,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:39,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271532360] [2021-12-22 10:25:39,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271532360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:39,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:39,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 10:25:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763560596] [2021-12-22 10:25:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:39,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 10:25:39,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 10:25:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:25:39,230 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:39,572 INFO L93 Difference]: Finished difference Result 316 states and 415 transitions. [2021-12-22 10:25:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 10:25:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-22 10:25:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:39,573 INFO L225 Difference]: With dead ends: 316 [2021-12-22 10:25:39,574 INFO L226 Difference]: Without dead ends: 275 [2021-12-22 10:25:39,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-12-22 10:25:39,574 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 715 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:39,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 744 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-22 10:25:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 156. [2021-12-22 10:25:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 153 states have internal predecessors, (173), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:25:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 189 transitions. [2021-12-22 10:25:39,590 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 189 transitions. Word has length 39 [2021-12-22 10:25:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:39,590 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 189 transitions. [2021-12-22 10:25:39,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 189 transitions. [2021-12-22 10:25:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 10:25:39,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:39,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:39,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 10:25:39,591 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1447224354, now seen corresponding path program 1 times [2021-12-22 10:25:39,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:39,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986415526] [2021-12-22 10:25:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:39,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:39,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:39,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986415526] [2021-12-22 10:25:39,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986415526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:39,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336568777] [2021-12-22 10:25:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:39,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:39,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:39,708 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) [2021-12-22 10:25:39,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:25:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:39,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 10:25:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:39,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:39,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:39,953 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 15 treesize of output 7 [2021-12-22 10:25:39,955 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 15 treesize of output 7 [2021-12-22 10:25:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:39,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:25:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:40,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336568777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:25:40,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:25:40,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 10 [2021-12-22 10:25:40,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742237368] [2021-12-22 10:25:40,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:25:40,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 10:25:40,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 10:25:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-22 10:25:40,114 INFO L87 Difference]: Start difference. First operand 156 states and 189 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:40,210 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2021-12-22 10:25:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:25:40,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-22 10:25:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:40,212 INFO L225 Difference]: With dead ends: 249 [2021-12-22 10:25:40,212 INFO L226 Difference]: Without dead ends: 188 [2021-12-22 10:25:40,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-22 10:25:40,213 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 40 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:40,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 317 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-22 10:25:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 170. [2021-12-22 10:25:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 167 states have internal predecessors, (187), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:25:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2021-12-22 10:25:40,224 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 42 [2021-12-22 10:25:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:40,224 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2021-12-22 10:25:40,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2021-12-22 10:25:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 10:25:40,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:40,225 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:40,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:40,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 10:25:40,440 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:40,441 INFO L85 PathProgramCache]: Analyzing trace with hash -600772010, now seen corresponding path program 2 times [2021-12-22 10:25:40,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:40,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746100006] [2021-12-22 10:25:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:40,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:40,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:40,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746100006] [2021-12-22 10:25:40,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746100006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:40,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689446877] [2021-12-22 10:25:40,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:25:40,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:40,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:40,625 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) [2021-12-22 10:25:40,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:25:40,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:25:40,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:25:40,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-22 10:25:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:40,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:25:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:40,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:40,829 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 10:25:40,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 10:25:40,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-22 10:25:40,894 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-22 10:25:40,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 10:25:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:40,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:40,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2021-12-22 10:25:41,305 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 15 treesize of output 7 [2021-12-22 10:25:41,438 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:25:41,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2021-12-22 10:25:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:41,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:25:41,575 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_10| Int) (v_ArrVal_588 (Array Int Int))) (or (not (= 0 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_588))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_10|) 0)))) is different from false [2021-12-22 10:25:41,605 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_10| Int) (|v_ULTIMATE.start_main_~node~1#1.base_11| Int) (v_ArrVal_588 (Array Int Int))) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_11| 1) |v_ULTIMATE.start_main_~item~0#1.base_10|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_11|) 0)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_11| v_ArrVal_588))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10|) 0 |v_ULTIMATE.start_main_~node~1#1.base_11|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)))) is different from false [2021-12-22 10:25:41,677 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 10:25:41,677 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 44 [2021-12-22 10:25:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:41,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:25:41,686 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 163 treesize of output 157 [2021-12-22 10:25:41,692 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 142 treesize of output 138 [2021-12-22 10:25:41,845 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 134 treesize of output 126 [2021-12-22 10:25:42,223 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:25:42,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2021-12-22 10:25:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-22 10:25:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689446877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:25:42,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:25:42,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2021-12-22 10:25:42,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932215612] [2021-12-22 10:25:42,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:25:42,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 10:25:42,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 10:25:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=485, Unknown=2, NotChecked=90, Total=650 [2021-12-22 10:25:42,242 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:43,480 INFO L93 Difference]: Finished difference Result 351 states and 437 transitions. [2021-12-22 10:25:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 10:25:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 10:25:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:43,482 INFO L225 Difference]: With dead ends: 351 [2021-12-22 10:25:43,482 INFO L226 Difference]: Without dead ends: 348 [2021-12-22 10:25:43,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=977, Unknown=4, NotChecked=138, Total=1406 [2021-12-22 10:25:43,483 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 997 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:43,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 1368 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 688 Invalid, 0 Unknown, 665 Unchecked, 0.5s Time] [2021-12-22 10:25:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-22 10:25:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 181. [2021-12-22 10:25:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 167 states have (on average 1.1916167664670658) internal successors, (199), 178 states have internal predecessors, (199), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:25:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2021-12-22 10:25:43,499 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 44 [2021-12-22 10:25:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2021-12-22 10:25:43,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2021-12-22 10:25:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 10:25:43,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:43,500 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:43,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:43,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 10:25:43,718 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash 186164471, now seen corresponding path program 1 times [2021-12-22 10:25:43,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:43,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77891729] [2021-12-22 10:25:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:43,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:43,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77891729] [2021-12-22 10:25:43,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77891729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820645842] [2021-12-22 10:25:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:43,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:43,926 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) [2021-12-22 10:25:43,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:25:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 10:25:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:44,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:25:44,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:44,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:44,097 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:25:44,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:25:44,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-22 10:25:44,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:44,176 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-22 10:25:44,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 32 [2021-12-22 10:25:44,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:44,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:44,462 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 15 treesize of output 7 [2021-12-22 10:25:44,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:25:44,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 27 [2021-12-22 10:25:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:44,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:25:45,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) is different from false [2021-12-22 10:25:45,717 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) is different from false [2021-12-22 10:25:45,805 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 10:25:45,805 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 44 [2021-12-22 10:25:45,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:25:45,813 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 319 treesize of output 309 [2021-12-22 10:25:45,820 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 670 treesize of output 646 [2021-12-22 10:25:45,945 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 123 treesize of output 115 [2021-12-22 10:25:46,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 10:25:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-22 10:25:46,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820645842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:25:46,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:25:46,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2021-12-22 10:25:46,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15438040] [2021-12-22 10:25:46,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:25:46,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 10:25:46,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 10:25:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=440, Unknown=2, NotChecked=86, Total=600 [2021-12-22 10:25:46,036 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 25 states, 25 states have (on average 4.24) internal successors, (106), 25 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:46,096 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (= |c_ULTIMATE.start_main_~data~0#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) 0) 0)) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (= (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0))) is different from false [2021-12-22 10:25:46,100 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (= |c_ULTIMATE.start_main_~data~0#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) 0) 0)) (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0))) is different from false [2021-12-22 10:25:46,986 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (= |c_ULTIMATE.start_main_~data~0#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) 0) 0)) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|) 1) (forall ((|ULTIMATE.start_main_~item~0#1.base| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0))) is different from false [2021-12-22 10:25:47,021 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse3)) (.cse0 (select .cse1 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (not (= .cse0 0)) (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (= |c_ULTIMATE.start_main_~data~0#1.offset| 0) (not (= (select .cse1 0) 0)) (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) .cse3) 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse4) 0) 0)) (= (select |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0)) (not (= .cse4 .cse0))))) is different from false [2021-12-22 10:25:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:47,517 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2021-12-22 10:25:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 10:25:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.24) internal successors, (106), 25 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 10:25:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:47,518 INFO L225 Difference]: With dead ends: 231 [2021-12-22 10:25:47,518 INFO L226 Difference]: Without dead ends: 228 [2021-12-22 10:25:47,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=176, Invalid=772, Unknown=6, NotChecked=378, Total=1332 [2021-12-22 10:25:47,519 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 372 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:47,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 1306 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 613 Invalid, 0 Unknown, 480 Unchecked, 0.3s Time] [2021-12-22 10:25:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-22 10:25:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 188. [2021-12-22 10:25:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 185 states have internal predecessors, (206), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:25:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2021-12-22 10:25:47,549 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 44 [2021-12-22 10:25:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:47,549 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2021-12-22 10:25:47,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.24) internal successors, (106), 25 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2021-12-22 10:25:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 10:25:47,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:47,550 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:47,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:47,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:47,764 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash -498608819, now seen corresponding path program 1 times [2021-12-22 10:25:47,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534484465] [2021-12-22 10:25:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:47,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:25:47,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:47,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534484465] [2021-12-22 10:25:47,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534484465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:47,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:47,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:25:47,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92557160] [2021-12-22 10:25:47,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:47,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:25:47,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:25:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:25:47,808 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:47,887 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2021-12-22 10:25:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:25:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 10:25:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:47,889 INFO L225 Difference]: With dead ends: 190 [2021-12-22 10:25:47,889 INFO L226 Difference]: Without dead ends: 153 [2021-12-22 10:25:47,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:47,890 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:47,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 325 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-22 10:25:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-12-22 10:25:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 150 states have internal predecessors, (167), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:25:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2021-12-22 10:25:47,900 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 45 [2021-12-22 10:25:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:47,900 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2021-12-22 10:25:47,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2021-12-22 10:25:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 10:25:47,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:47,901 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:47,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 10:25:47,901 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash -636511633, now seen corresponding path program 1 times [2021-12-22 10:25:47,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:47,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020264980] [2021-12-22 10:25:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:47,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:48,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020264980] [2021-12-22 10:25:48,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020264980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600068456] [2021-12-22 10:25:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:48,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:48,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:48,370 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) [2021-12-22 10:25:48,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 10:25:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-22 10:25:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:48,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:25:48,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:48,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:48,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:48,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:25:48,668 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:25:48,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:25:48,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-22 10:25:48,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 10:25:48,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:48,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:48,789 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-22 10:25:48,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 31 [2021-12-22 10:25:48,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:48,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:48,804 INFO L353 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-12-22 10:25:48,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-12-22 10:25:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:50,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:50,057 INFO L353 Elim1Store]: treesize reduction 93, result has 13.1 percent of original size [2021-12-22 10:25:50,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 129 treesize of output 80 [2021-12-22 10:25:50,068 INFO L353 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-12-22 10:25:50,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-12-22 10:25:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:50,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:25:52,687 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_833 Int)) (let ((.cse11 (+ |c_ULTIMATE.start_main_~item~0#1.offset| 4))) (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.offset|) .cse11 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse10 (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_833) .cse11 |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| .cse10)) (.cse6 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| .cse9))) (let ((.cse5 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse3 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse1 (select .cse10 |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse2 (select .cse9 |c_ULTIMATE.start_main_~item~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4))) (and (= (select .cse3 .cse4) 0) (= (select .cse5 .cse4) 0))) (let ((.cse7 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse8 (select .cse5 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse6 .cse7) .cse8) 0) (= (select (select .cse0 .cse7) .cse8) 0))) (not (= (select (select .cse6 .cse1) .cse2) 0)))))))) is different from false [2021-12-22 10:25:52,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_829 (Array Int Int)) (v_ArrVal_833 Int) (v_ArrVal_830 (Array Int Int))) (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_830)) (.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_829))) (let ((.cse9 (store (store (select .cse11 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse10 (store (store (select .cse12 |ULTIMATE.start_main_~item~0#1.base|) 0 v_ArrVal_833) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (store .cse12 |ULTIMATE.start_main_~item~0#1.base| .cse10)) (.cse6 (store .cse11 |ULTIMATE.start_main_~item~0#1.base| .cse9))) (let ((.cse1 (select .cse10 0)) (.cse2 (select .cse9 0)) (.cse5 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse3 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4))) (and (= (select .cse3 .cse4) 0) (= (select .cse5 .cse4) 0))) (not (= (select (select .cse6 .cse1) .cse2) 0)) (let ((.cse7 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse8 (select .cse5 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse0 .cse7) .cse8) 0) (= (select (select .cse6 .cse7) .cse8) 0))))))))) is different from false [2021-12-22 10:25:54,374 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 10:25:54,375 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 601 treesize of output 463 [2021-12-22 10:25:54,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:54,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:25:54,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 445 treesize of output 307 [2021-12-22 10:25:54,565 INFO L353 Elim1Store]: treesize reduction 184, result has 47.6 percent of original size [2021-12-22 10:25:54,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 4657 treesize of output 4527 [2021-12-22 10:25:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:54,885 INFO L353 Elim1Store]: treesize reduction 92, result has 72.7 percent of original size [2021-12-22 10:25:54,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 61369 treesize of output 57241 [2021-12-22 10:25:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:55,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:55,381 INFO L353 Elim1Store]: treesize reduction 16, result has 92.4 percent of original size [2021-12-22 10:25:55,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 102468 treesize of output 95354 [2021-12-22 10:25:58,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:58,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:25:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:58,784 INFO L353 Elim1Store]: treesize reduction 16, result has 92.4 percent of original size [2021-12-22 10:25:58,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 111331 treesize of output 106541 [2021-12-22 10:26:00,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-22 10:26:00,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:26:00,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-22 10:26:00,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828969051] [2021-12-22 10:26:00,301 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 10:26:00,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 10:26:00,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:26:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 10:26:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1074, Unknown=3, NotChecked=134, Total=1332 [2021-12-22 10:26:00,302 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:26:02,081 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2021-12-22 10:26:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 10:26:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-22 10:26:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:26:02,083 INFO L225 Difference]: With dead ends: 221 [2021-12-22 10:26:02,083 INFO L226 Difference]: Without dead ends: 218 [2021-12-22 10:26:02,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=267, Invalid=1630, Unknown=3, NotChecked=170, Total=2070 [2021-12-22 10:26:02,084 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 833 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:26:02,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 604 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:26:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-22 10:26:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2021-12-22 10:26:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 153 states have internal predecessors, (170), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:26:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 185 transitions. [2021-12-22 10:26:02,096 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 185 transitions. Word has length 47 [2021-12-22 10:26:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:26:02,096 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 185 transitions. [2021-12-22 10:26:02,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 185 transitions. [2021-12-22 10:26:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 10:26:02,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:26:02,098 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:26:02,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 10:26:02,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:26:02,315 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:26:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:26:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1117057733, now seen corresponding path program 1 times [2021-12-22 10:26:02,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:26:02,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992246586] [2021-12-22 10:26:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:02,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:26:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:26:02,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:26:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992246586] [2021-12-22 10:26:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992246586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:26:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677915254] [2021-12-22 10:26:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:02,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:26:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:26:02,910 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) [2021-12-22 10:26:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 10:26:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-22 10:26:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:26:03,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:26:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:03,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:26:03,101 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 10:26:03,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 10:26:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:03,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:26:03,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:03,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-12-22 10:26:03,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:03,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-22 10:26:03,267 INFO L353 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-12-22 10:26:03,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-12-22 10:26:03,356 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-22 10:26:03,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 54 [2021-12-22 10:26:03,368 INFO L353 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-22 10:26:03,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-22 10:26:03,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-12-22 10:26:03,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:03,459 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-22 10:26:03,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 52 [2021-12-22 10:26:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:03,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 69 [2021-12-22 10:26:04,522 INFO L353 Elim1Store]: treesize reduction 133, result has 14.7 percent of original size [2021-12-22 10:26:04,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 181 treesize of output 114 [2021-12-22 10:26:04,548 INFO L353 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-12-22 10:26:04,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 37 [2021-12-22 10:26:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:26:04,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:26:19,863 INFO L353 Elim1Store]: treesize reduction 139, result has 31.5 percent of original size [2021-12-22 10:26:19,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 976 treesize of output 669 [2021-12-22 10:26:19,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:19,939 INFO L353 Elim1Store]: treesize reduction 110, result has 33.3 percent of original size [2021-12-22 10:26:19,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 606 treesize of output 290 [2021-12-22 10:26:19,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:19,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:19,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:20,013 INFO L353 Elim1Store]: treesize reduction 96, result has 37.3 percent of original size [2021-12-22 10:26:20,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 1209 treesize of output 1171 [2021-12-22 10:26:20,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:20,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:20,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:20,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:26:20,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 2616 treesize of output 2462 [2021-12-22 10:26:20,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:20,134 INFO L353 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2021-12-22 10:26:20,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3308 treesize of output 3182 [2021-12-22 10:26:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:20,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:26:20,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2805 treesize of output 2755 [2021-12-22 10:26:20,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-22 10:26:20,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:26:20,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-22 10:26:20,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057323446] [2021-12-22 10:26:20,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 10:26:20,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 10:26:20,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:26:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 10:26:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1108, Unknown=11, NotChecked=0, Total=1260 [2021-12-22 10:26:20,300 INFO L87 Difference]: Start difference. First operand 156 states and 185 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:26:22,431 INFO L93 Difference]: Finished difference Result 220 states and 270 transitions. [2021-12-22 10:26:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 10:26:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-22 10:26:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:26:22,446 INFO L225 Difference]: With dead ends: 220 [2021-12-22 10:26:22,447 INFO L226 Difference]: Without dead ends: 217 [2021-12-22 10:26:22,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=385, Invalid=1766, Unknown=11, NotChecked=0, Total=2162 [2021-12-22 10:26:22,457 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 777 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:26:22,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 618 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:26:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-22 10:26:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 159. [2021-12-22 10:26:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 156 states have internal predecessors, (173), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:26:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2021-12-22 10:26:22,480 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 47 [2021-12-22 10:26:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:26:22,480 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2021-12-22 10:26:22,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2021-12-22 10:26:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 10:26:22,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:26:22,486 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:26:22,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 10:26:22,705 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,SelfDestructingSolverStorable21 [2021-12-22 10:26:22,705 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:26:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:26:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 814579079, now seen corresponding path program 2 times [2021-12-22 10:26:22,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:26:22,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471320119] [2021-12-22 10:26:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:22,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:26:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:26:22,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:26:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471320119] [2021-12-22 10:26:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471320119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:26:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471671235] [2021-12-22 10:26:22,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:26:22,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:26:22,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:26:22,880 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) [2021-12-22 10:26:22,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 10:26:22,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 10:26:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:26:22,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 10:26:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:26:23,082 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 [2021-12-22 10:26:23,084 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 [2021-12-22 10:26:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 10:26:23,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:26:23,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471671235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:26:23,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:26:23,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2021-12-22 10:26:23,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005083386] [2021-12-22 10:26:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:26:23,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:26:23,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:26:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:26:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-22 10:26:23,100 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:26:23,212 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2021-12-22 10:26:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:26:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-22 10:26:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:26:23,213 INFO L225 Difference]: With dead ends: 161 [2021-12-22 10:26:23,213 INFO L226 Difference]: Without dead ends: 153 [2021-12-22 10:26:23,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-22 10:26:23,214 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 13 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:26:23,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 319 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:26:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-22 10:26:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-12-22 10:26:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 136 states have internal predecessors, (152), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:26:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2021-12-22 10:26:23,224 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 48 [2021-12-22 10:26:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:26:23,225 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2021-12-22 10:26:23,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2021-12-22 10:26:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 10:26:23,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:26:23,225 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:26:23,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 10:26:23,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:26:23,443 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:26:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:26:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 568067714, now seen corresponding path program 1 times [2021-12-22 10:26:23,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:26:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942069297] [2021-12-22 10:26:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:23,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:26:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:26:23,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:26:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942069297] [2021-12-22 10:26:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942069297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:26:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280790389] [2021-12-22 10:26:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:23,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:26:23,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:26:23,579 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) [2021-12-22 10:26:23,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 10:26:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 10:26:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:26:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:23,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:26:23,840 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 8 [2021-12-22 10:26:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:26:23,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:26:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:26:24,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280790389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:26:24,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:26:24,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 20 [2021-12-22 10:26:24,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969637218] [2021-12-22 10:26:24,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:26:24,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 10:26:24,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:26:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 10:26:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-12-22 10:26:24,040 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:26:24,623 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2021-12-22 10:26:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 10:26:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-22 10:26:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:26:24,634 INFO L225 Difference]: With dead ends: 265 [2021-12-22 10:26:24,634 INFO L226 Difference]: Without dead ends: 191 [2021-12-22 10:26:24,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 10:26:24,635 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 685 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:26:24,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 736 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:26:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-22 10:26:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 143. [2021-12-22 10:26:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 140 states have internal predecessors, (156), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 10:26:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2021-12-22 10:26:24,655 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 51 [2021-12-22 10:26:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:26:24,655 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2021-12-22 10:26:24,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:26:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2021-12-22 10:26:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 10:26:24,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:26:24,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:26:24,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 10:26:24,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-22 10:26:24,876 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:26:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:26:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash 950662001, now seen corresponding path program 3 times [2021-12-22 10:26:24,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:26:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665326642] [2021-12-22 10:26:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:24,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:26:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 10:26:25,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:26:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665326642] [2021-12-22 10:26:25,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665326642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:26:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110015788] [2021-12-22 10:26:25,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:26:25,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:26:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:26:25,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:26:25,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 10:26:25,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 10:26:25,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:26:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 10:26:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:26:25,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:26:25,281 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-22 10:26:25,281 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:26:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:25,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:26:25,323 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 10:26:25,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 10:26:25,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 10:26:25,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 10:26:25,370 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:26:25,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:26:25,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:25,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-22 10:26:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:25,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2021-12-22 10:26:25,670 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-12-22 10:26:25,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-12-22 10:26:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:26:25,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:26:39,426 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_21| Int)) (or (and (forall ((v_ArrVal_1280 (Array Int Int)) (v_ArrVal_1282 Int) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1280))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_21| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_21|) |ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_1282) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4)) 0)) (forall ((v_ArrVal_1283 Int) (v_ArrVal_1279 (Array Int Int)) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1279))) (store .cse1 |v_ULTIMATE.start_main_~item~0#1.base_21| (store (store (select .cse1 |v_ULTIMATE.start_main_~item~0#1.base_21|) |ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_1283) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) (+ |c_ULTIMATE.start_main_~data~0#1.offset| 4)) 0))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_21|) 0)))) is different from false [2021-12-22 10:26:39,660 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 10:26:39,660 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 102 [2021-12-22 10:26:39,679 INFO L353 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-22 10:26:39,680 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 94 [2021-12-22 10:26:39,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:26:39,689 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 408 treesize of output 396 [2021-12-22 10:26:39,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:26:39,721 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 710 treesize of output 698 [2021-12-22 10:26:39,750 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 1161 treesize of output 1113 [2021-12-22 10:26:39,760 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 1317 treesize of output 1285