./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.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/array-industry-pattern/array_single_elem_init.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 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:06:55,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:06:55,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:06:55,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:06:55,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:06:55,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:06:55,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:06:55,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:06:55,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:06:55,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:06:55,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:06:55,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:06:55,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:06:55,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:06:55,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:06:55,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:06:55,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:06:55,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:06:55,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:06:55,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:06:55,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:06:55,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:06:55,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:06:55,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:06:55,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:06:55,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:06:55,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:06:55,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:06:55,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:06:55,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:06:55,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:06:55,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:06:55,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:06:55,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:06:55,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:06:55,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:06:55,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:06:55,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:06:55,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:06:55,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:06:55,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:06:55,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:06:55,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:06:55,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:06:55,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:06:55,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:06:55,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:06:55,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:06:55,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:06:55,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:06:55,608 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:06:55,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:06:55,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:06:55,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:06:55,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:06:55,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:06:55,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:06:55,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:06:55,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:06:55,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:06:55,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:06:55,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:06:55,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:06:55,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:06:55,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:06:55,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:06:55,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:06:55,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:06:55,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:06:55,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:06:55,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:06:55,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:06:55,612 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:06:55,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:06:55,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:06:55,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:06:55,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 [2021-12-22 08:06:55,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:06:55,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:06:55,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:06:55,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:06:55,841 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:06:55,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2021-12-22 08:06:55,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/009e54b27/9b7a2d68ce9b4f6ebd2553b675d307a8/FLAGb1b087c2f [2021-12-22 08:06:56,266 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:06:56,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2021-12-22 08:06:56,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/009e54b27/9b7a2d68ce9b4f6ebd2553b675d307a8/FLAGb1b087c2f [2021-12-22 08:06:56,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/009e54b27/9b7a2d68ce9b4f6ebd2553b675d307a8 [2021-12-22 08:06:56,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:06:56,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:06:56,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:06:56,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:06:56,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:06:56,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598ce914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56, skipping insertion in model container [2021-12-22 08:06:56,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:06:56,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:06:56,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2021-12-22 08:06:56,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:06:56,856 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:06:56,870 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2021-12-22 08:06:56,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:06:56,903 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:06:56,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56 WrapperNode [2021-12-22 08:06:56,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:06:56,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:06:56,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:06:56,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:06:56,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,947 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-22 08:06:56,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:06:56,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:06:56,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:06:56,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:06:56,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:06:56,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:06:56,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:06:56,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:06:56,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (1/1) ... [2021-12-22 08:06:56,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:06:57,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:06:57,021 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 08:06:57,035 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 08:06:57,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:06:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:06:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:06:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:06:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:06:57,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:06:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:06:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:06:57,117 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:06:57,119 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:06:57,279 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:06:57,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:06:57,298 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 08:06:57,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:57 BoogieIcfgContainer [2021-12-22 08:06:57,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:06:57,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:06:57,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:06:57,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:06:57,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:06:56" (1/3) ... [2021-12-22 08:06:57,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cd8711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:57, skipping insertion in model container [2021-12-22 08:06:57,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:56" (2/3) ... [2021-12-22 08:06:57,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cd8711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:57, skipping insertion in model container [2021-12-22 08:06:57,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:57" (3/3) ... [2021-12-22 08:06:57,316 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2021-12-22 08:06:57,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:06:57,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:06:57,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:06:57,401 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 08:06:57,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:06:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 08:06:57,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:06:57,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:06:57,424 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:06:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:06:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2021-12-22 08:06:57,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:06:57,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614038802] [2021-12-22 08:06:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:06:57,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:06:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:06:57,553 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 08:06:57,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:06:57,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614038802] [2021-12-22 08:06:57,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614038802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:06:57,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:06:57,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:06:57,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868538924] [2021-12-22 08:06:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:06:57,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:06:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:06:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:06:57,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:06:57,595 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:06:57,606 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-12-22 08:06:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:06:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 08:06:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:06:57,613 INFO L225 Difference]: With dead ends: 32 [2021-12-22 08:06:57,614 INFO L226 Difference]: Without dead ends: 16 [2021-12-22 08:06:57,616 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 08:06:57,619 INFO L933 BasicCegarLoop]: 25 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, 25 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 08:06:57,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:06:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-22 08:06:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-22 08:06:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-12-22 08:06:57,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2021-12-22 08:06:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:06:57,645 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-12-22 08:06:57,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-12-22 08:06:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 08:06:57,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:06:57,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:06:57,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:06:57,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:06:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:06:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2021-12-22 08:06:57,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:06:57,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52554117] [2021-12-22 08:06:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:06:57,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:06:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:06:57,689 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 08:06:57,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:06:57,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52554117] [2021-12-22 08:06:57,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52554117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:06:57,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:06:57,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:06:57,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201987570] [2021-12-22 08:06:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:06:57,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:06:57,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:06:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:06:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:06:57,694 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:06:57,733 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2021-12-22 08:06:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:06:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 08:06:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:06:57,735 INFO L225 Difference]: With dead ends: 33 [2021-12-22 08:06:57,735 INFO L226 Difference]: Without dead ends: 25 [2021-12-22 08:06:57,735 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 08:06:57,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:06:57,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:06:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-22 08:06:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-12-22 08:06:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-22 08:06:57,742 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2021-12-22 08:06:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:06:57,742 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-22 08:06:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-22 08:06:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 08:06:57,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:06:57,743 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:06:57,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:06:57,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:06:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:06:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2021-12-22 08:06:57,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:06:57,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285335759] [2021-12-22 08:06:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:06:57,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:06:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:06:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:06:57,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:06:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285335759] [2021-12-22 08:06:57,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285335759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:06:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703021386] [2021-12-22 08:06:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:06:57,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:06:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:06:57,819 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 08:06:57,852 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 08:06:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:06:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:06:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:06:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:06:57,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:06:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:06:58,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703021386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:06:58,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:06:58,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 08:06:58,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946651327] [2021-12-22 08:06:58,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:06:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:06:58,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:06:58,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:06:58,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:06:58,042 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:06:58,127 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-12-22 08:06:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:06:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 08:06:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:06:58,129 INFO L225 Difference]: With dead ends: 55 [2021-12-22 08:06:58,129 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 08:06:58,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:06:58,130 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:06:58,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:06:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 08:06:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-12-22 08:06:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-12-22 08:06:58,137 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 16 [2021-12-22 08:06:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:06:58,137 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-12-22 08:06:58,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-12-22 08:06:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 08:06:58,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:06:58,138 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:06:58,170 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 08:06:58,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:06:58,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:06:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:06:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash 310337378, now seen corresponding path program 2 times [2021-12-22 08:06:58,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:06:58,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888246221] [2021-12-22 08:06:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:06:58,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:06:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:06:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 08:06:58,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:06:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888246221] [2021-12-22 08:06:58,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888246221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:06:58,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466521115] [2021-12-22 08:06:58,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:06:58,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:06:58,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:06:58,516 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 08:06:58,524 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 08:06:58,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:06:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:06:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:06:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:06:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 08:06:58,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:06:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 08:06:58,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466521115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:06:58,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:06:58,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2021-12-22 08:06:58,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409104199] [2021-12-22 08:06:58,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:06:58,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:06:58,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:06:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:06:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:06:58,803 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:06:58,969 INFO L93 Difference]: Finished difference Result 112 states and 158 transitions. [2021-12-22 08:06:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:06:58,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 08:06:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:06:58,973 INFO L225 Difference]: With dead ends: 112 [2021-12-22 08:06:58,973 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 08:06:58,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:06:58,977 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 210 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:06:58,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 46 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:06:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 08:06:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-12-22 08:06:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 84 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2021-12-22 08:06:58,996 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 34 [2021-12-22 08:06:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:06:58,996 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2021-12-22 08:06:58,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:06:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2021-12-22 08:06:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 08:06:58,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:06:58,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:06:59,024 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 08:06:59,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 08:06:59,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:06:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:06:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash -708297260, now seen corresponding path program 3 times [2021-12-22 08:06:59,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:06:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648920863] [2021-12-22 08:06:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:06:59,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:06:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:06:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-22 08:06:59,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:06:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648920863] [2021-12-22 08:06:59,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648920863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:06:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734254362] [2021-12-22 08:06:59,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:06:59,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:06:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:06:59,416 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 08:06:59,417 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 08:06:59,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 08:06:59,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:06:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 08:06:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:06:59,547 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 10 treesize of output 8 [2021-12-22 08:06:59,664 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 0 case distinctions, treesize of input 18 treesize of output 18 [2021-12-22 08:06:59,670 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 18 treesize of output 20 [2021-12-22 08:06:59,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-22 08:06:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-12-22 08:06:59,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:06:59,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:06:59,783 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 1 case distinctions, treesize of input 27 treesize of output 28 [2021-12-22 08:06:59,787 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 45 treesize of output 29 [2021-12-22 08:06:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-12-22 08:06:59,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734254362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:06:59,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:06:59,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2021-12-22 08:06:59,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496464581] [2021-12-22 08:06:59,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:06:59,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:06:59,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:06:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:06:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:06:59,886 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:07:00,220 INFO L93 Difference]: Finished difference Result 207 states and 289 transitions. [2021-12-22 08:07:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 08:07:00,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-22 08:07:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:07:00,222 INFO L225 Difference]: With dead ends: 207 [2021-12-22 08:07:00,222 INFO L226 Difference]: Without dead ends: 129 [2021-12-22 08:07:00,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 08:07:00,223 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 160 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:07:00,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 55 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:07:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-22 08:07:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-12-22 08:07:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.308411214953271) internal successors, (140), 107 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-12-22 08:07:00,231 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 73 [2021-12-22 08:07:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:07:00,232 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-12-22 08:07:00,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-12-22 08:07:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-22 08:07:00,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:07:00,234 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:07:00,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:07:00,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:00,457 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:07:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:07:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -422151838, now seen corresponding path program 1 times [2021-12-22 08:07:00,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:07:00,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913728074] [2021-12-22 08:07:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:07:00,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:07:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:07:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 08:07:00,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:07:00,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913728074] [2021-12-22 08:07:00,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913728074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:07:00,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365025963] [2021-12-22 08:07:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:07:00,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:07:00,639 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 08:07:00,648 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 08:07:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:07:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 08:07:00,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:07:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 08:07:00,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:07:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 08:07:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365025963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:07:01,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:07:01,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 08:07:01,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886668003] [2021-12-22 08:07:01,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:07:01,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 08:07:01,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:07:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 08:07:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:07:01,190 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:07:01,471 INFO L93 Difference]: Finished difference Result 276 states and 372 transitions. [2021-12-22 08:07:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 08:07:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-22 08:07:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:07:01,474 INFO L225 Difference]: With dead ends: 276 [2021-12-22 08:07:01,474 INFO L226 Difference]: Without dead ends: 251 [2021-12-22 08:07:01,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:07:01,476 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 413 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:07:01,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 78 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:07:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-22 08:07:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 219. [2021-12-22 08:07:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.31651376146789) internal successors, (287), 218 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 287 transitions. [2021-12-22 08:07:01,513 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 287 transitions. Word has length 76 [2021-12-22 08:07:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:07:01,514 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 287 transitions. [2021-12-22 08:07:01,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 287 transitions. [2021-12-22 08:07:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 08:07:01,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:07:01,519 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:07:01,544 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 08:07:01,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:01,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:07:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:07:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash 5109204, now seen corresponding path program 2 times [2021-12-22 08:07:01,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:07:01,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504836027] [2021-12-22 08:07:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:07:01,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:07:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:07:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-22 08:07:02,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:07:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504836027] [2021-12-22 08:07:02,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504836027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:07:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485277559] [2021-12-22 08:07:02,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:07:02,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:02,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:07:02,084 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 08:07:02,086 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 08:07:02,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:07:02,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:07:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 08:07:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:07:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-22 08:07:02,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:07:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-22 08:07:03,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485277559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:07:03,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:07:03,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 08:07:03,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670233266] [2021-12-22 08:07:03,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:07:03,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 08:07:03,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:07:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 08:07:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 08:07:03,323 INFO L87 Difference]: Start difference. First operand 219 states and 287 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:07:03,997 INFO L93 Difference]: Finished difference Result 555 states and 754 transitions. [2021-12-22 08:07:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 08:07:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-22 08:07:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:07:04,000 INFO L225 Difference]: With dead ends: 555 [2021-12-22 08:07:04,000 INFO L226 Difference]: Without dead ends: 515 [2021-12-22 08:07:04,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 08:07:04,002 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1017 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:07:04,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 127 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:07:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-22 08:07:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 447. [2021-12-22 08:07:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3161434977578474) internal successors, (587), 446 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 587 transitions. [2021-12-22 08:07:04,018 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 587 transitions. Word has length 151 [2021-12-22 08:07:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:07:04,019 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 587 transitions. [2021-12-22 08:07:04,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 587 transitions. [2021-12-22 08:07:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-22 08:07:04,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:07:04,024 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:07:04,050 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 08:07:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:04,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:07:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:07:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 749201748, now seen corresponding path program 3 times [2021-12-22 08:07:04,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:07:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826989366] [2021-12-22 08:07:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:07:04,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:07:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:07:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-12-22 08:07:05,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:07:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826989366] [2021-12-22 08:07:05,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826989366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:07:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390568715] [2021-12-22 08:07:05,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:07:05,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:07:05,243 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 08:07:05,244 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 08:07:05,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-22 08:07:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:07:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 08:07:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:07:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2021-12-22 08:07:06,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:07:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2021-12-22 08:07:07,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390568715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:07:07,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:07:07,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26, 26] total 74 [2021-12-22 08:07:07,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570540301] [2021-12-22 08:07:07,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:07:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-22 08:07:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:07:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-22 08:07:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-12-22 08:07:07,649 INFO L87 Difference]: Start difference. First operand 447 states and 587 transitions. Second operand has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:07:09,034 INFO L93 Difference]: Finished difference Result 875 states and 1167 transitions. [2021-12-22 08:07:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-22 08:07:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2021-12-22 08:07:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:07:09,039 INFO L225 Difference]: With dead ends: 875 [2021-12-22 08:07:09,040 INFO L226 Difference]: Without dead ends: 799 [2021-12-22 08:07:09,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-12-22 08:07:09,045 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2197 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 08:07:09,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2197 Valid, 173 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 08:07:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-22 08:07:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 791. [2021-12-22 08:07:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.2734177215189872) internal successors, (1006), 790 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1006 transitions. [2021-12-22 08:07:09,100 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1006 transitions. Word has length 307 [2021-12-22 08:07:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:07:09,103 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1006 transitions. [2021-12-22 08:07:09,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1006 transitions. [2021-12-22 08:07:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-12-22 08:07:09,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:07:09,113 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:07:09,143 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 08:07:09,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:09,338 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:07:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:07:09,339 INFO L85 PathProgramCache]: Analyzing trace with hash 823095820, now seen corresponding path program 4 times [2021-12-22 08:07:09,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:07:09,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941364125] [2021-12-22 08:07:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:07:09,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:07:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:07:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2021-12-22 08:07:11,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:07:11,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941364125] [2021-12-22 08:07:11,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941364125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:07:11,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471434904] [2021-12-22 08:07:11,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:07:11,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:11,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:07:11,368 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 08:07:11,368 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 08:07:11,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:07:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:07:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-22 08:07:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:07:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2021-12-22 08:07:12,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:07:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2021-12-22 08:07:17,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471434904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:07:17,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:07:17,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 147 [2021-12-22 08:07:17,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085291181] [2021-12-22 08:07:17,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:07:17,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-12-22 08:07:17,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:07:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-12-22 08:07:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2021-12-22 08:07:17,867 INFO L87 Difference]: Start difference. First operand 791 states and 1006 transitions. Second operand has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:07:26,289 INFO L93 Difference]: Finished difference Result 1813 states and 2393 transitions. [2021-12-22 08:07:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-22 08:07:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 576 [2021-12-22 08:07:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:07:26,296 INFO L225 Difference]: With dead ends: 1813 [2021-12-22 08:07:26,297 INFO L226 Difference]: Without dead ends: 1593 [2021-12-22 08:07:26,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1224 GetRequests, 1079 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2021-12-22 08:07:26,302 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5266 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 1060 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5266 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1060 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:07:26,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5266 Valid, 315 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1060 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 08:07:26,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-22 08:07:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1378. [2021-12-22 08:07:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 1.3159041394335511) internal successors, (1812), 1377 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1812 transitions. [2021-12-22 08:07:26,346 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1812 transitions. Word has length 576 [2021-12-22 08:07:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:07:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 1812 transitions. [2021-12-22 08:07:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:07:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1812 transitions. [2021-12-22 08:07:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 945 [2021-12-22 08:07:26,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:07:26,374 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 144, 73, 72, 72, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:07:26,399 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 08:07:26,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:26,600 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:07:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:07:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash -361923806, now seen corresponding path program 5 times [2021-12-22 08:07:26,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:07:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250243060] [2021-12-22 08:07:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:07:26,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:07:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:07:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 59436 backedges. 0 proven. 51624 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2021-12-22 08:07:33,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:07:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250243060] [2021-12-22 08:07:33,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250243060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:07:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680797183] [2021-12-22 08:07:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:07:33,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:07:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:07:33,459 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 08:07:33,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process