./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-lopstr16/sum_multi_array.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-lopstr16/sum_multi_array.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 26771b88cbebb1b541d9a1b404bc6cc4b00331d67b70950095eb210c62a0a606 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:36:56,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:36:56,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:36:56,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:36:56,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:36:56,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:36:56,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:36:56,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:36:56,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:36:56,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:36:56,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:36:56,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:36:56,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:36:56,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:36:56,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:36:56,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:36:56,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:36:56,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:36:56,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:36:56,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:36:56,577 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:36:56,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:36:56,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:36:56,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:36:56,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:36:56,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:36:56,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:36:56,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:36:56,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:36:56,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:36:56,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:36:56,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:36:56,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:36:56,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:36:56,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:36:56,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:36:56,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:36:56,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:36:56,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:36:56,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:36:56,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:36:56,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:36:56,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:36:56,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:36:56,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:36:56,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:36:56,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:36:56,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:36:56,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:36:56,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:36:56,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:36:56,618 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:36:56,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:36:56,619 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:36:56,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:36:56,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:36:56,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:36:56,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:36:56,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:36:56,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:36:56,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:36:56,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:36:56,620 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:36:56,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:36:56,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:36:56,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:36:56,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:36:56,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:36:56,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:36:56,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:36:56,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:36:56,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:36:56,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:36:56,623 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:36:56,623 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:36:56,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:36:56,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26771b88cbebb1b541d9a1b404bc6cc4b00331d67b70950095eb210c62a0a606 [2022-07-22 10:36:56,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:36:56,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:36:56,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:36:56,891 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:36:56,892 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:36:56,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2022-07-22 10:36:56,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe70c81/ee7f1a5e7b3e4d2fa25d82c111d6d65a/FLAG4f671285f [2022-07-22 10:36:57,413 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:36:57,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2022-07-22 10:36:57,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe70c81/ee7f1a5e7b3e4d2fa25d82c111d6d65a/FLAG4f671285f [2022-07-22 10:36:57,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe70c81/ee7f1a5e7b3e4d2fa25d82c111d6d65a [2022-07-22 10:36:57,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:36:57,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:36:57,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:36:57,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:36:57,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:36:57,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:36:57" (1/1) ... [2022-07-22 10:36:57,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709c0d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:36:57, skipping insertion in model container [2022-07-22 10:36:57,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:36:57" (1/1) ... [2022-07-22 10:36:57,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:36:57,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:36:57,607 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/sum_multi_array.i[808,821] [2022-07-22 10:36:57,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:37:09,689 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:37:09,698 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-lopstr16/sum_multi_array.i[808,821] [2022-07-22 10:37:09,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:37:09,717 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:37:09,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09 WrapperNode [2022-07-22 10:37:09,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:37:09,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:37:09,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:37:09,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:37:09,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,760 INFO L137 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-07-22 10:37:09,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:37:09,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:37:09,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:37:09,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:37:09,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:37:09,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:37:09,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:37:09,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:37:09,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (1/1) ... [2022-07-22 10:37:09,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:37:09,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:37:09,845 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) [2022-07-22 10:37:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:37:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:37:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:37:09,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:37:09,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:37:09,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:37:09,871 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 [2022-07-22 10:37:09,956 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:37:09,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:37:10,122 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:37:10,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:37:10,128 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 10:37:10,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:37:10 BoogieIcfgContainer [2022-07-22 10:37:10,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:37:10,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:37:10,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:37:10,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:37:10,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:36:57" (1/3) ... [2022-07-22 10:37:10,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ead3a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:37:10, skipping insertion in model container [2022-07-22 10:37:10,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:37:09" (2/3) ... [2022-07-22 10:37:10,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ead3a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:37:10, skipping insertion in model container [2022-07-22 10:37:10,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:37:10" (3/3) ... [2022-07-22 10:37:10,138 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2022-07-22 10:37:10,150 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:37:10,151 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:37:10,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:37:10,194 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5a103638, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@56407784 [2022-07-22 10:37:10,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:37:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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) [2022-07-22 10:37:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 10:37:10,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:37:10,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:37:10,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:37:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:37:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2022-07-22 10:37:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:37:10,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784571683] [2022-07-22 10:37:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:37:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:37:10,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:37:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784571683] [2022-07-22 10:37:10,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784571683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:37:10,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:37:10,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:37:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549591318] [2022-07-22 10:37:10,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:37:10,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:37:10,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:37:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:37:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:37:10,419 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-22 10:37:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:37:10,482 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2022-07-22 10:37:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:37:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-07-22 10:37:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:37:10,492 INFO L225 Difference]: With dead ends: 42 [2022-07-22 10:37:10,492 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 10:37:10,495 INFO L412 NwaCegarLoop]: 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 [2022-07-22 10:37:10,498 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:37:10,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:37:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 10:37:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-07-22 10:37:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:37:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-22 10:37:10,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-07-22 10:37:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:37:10,525 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-22 10:37:10,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-22 10:37:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-22 10:37:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 10:37:10,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:37:10,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:37:10,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:37:10,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:37:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:37:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2022-07-22 10:37:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:37:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782907549] [2022-07-22 10:37:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:37:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:37:10,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:37:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782907549] [2022-07-22 10:37:10,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782907549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:37:10,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390616827] [2022-07-22 10:37:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:10,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:37:10,589 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) [2022-07-22 10:37:10,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:37:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:10,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:37:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:37:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:37:10,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:37:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:37:10,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390616827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:37:10,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:37:10,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 10:37:10,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005744763] [2022-07-22 10:37:10,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:37:10,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 10:37:10,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:37:10,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 10:37:10,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:37:10,717 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:37:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:37:10,787 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-07-22 10:37:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:37:10,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 10:37:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:37:10,789 INFO L225 Difference]: With dead ends: 58 [2022-07-22 10:37:10,789 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 10:37:10,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:37:10,791 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:37:10,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:37:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 10:37:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2022-07-22 10:37:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:37:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-22 10:37:10,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2022-07-22 10:37:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:37:10,799 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-22 10:37:10,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:37:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-22 10:37:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:37:10,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:37:10,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:37:10,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 10:37:11,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:11,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:37:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:37:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 2 times [2022-07-22 10:37:11,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:37:11,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265640502] [2022-07-22 10:37:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:11,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:37:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:37:11,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:37:11,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265640502] [2022-07-22 10:37:11,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265640502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:37:11,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529194365] [2022-07-22 10:37:11,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:37:11,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:11,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:37:11,215 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) [2022-07-22 10:37:11,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:37:11,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:37:11,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:37:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:37:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:37:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:37:11,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:37:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:37:11,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529194365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:37:11,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:37:11,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 10:37:11,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402043003] [2022-07-22 10:37:11,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:37:11,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 10:37:11,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:37:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 10:37:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 10:37:11,448 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2022-07-22 10:37:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:37:11,592 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2022-07-22 10:37:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:37:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 25 [2022-07-22 10:37:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:37:11,594 INFO L225 Difference]: With dead ends: 124 [2022-07-22 10:37:11,594 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 10:37:11,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 10:37:11,597 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 130 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:37:11,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 50 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:37:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 10:37:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 52. [2022-07-22 10:37:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 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) [2022-07-22 10:37:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-22 10:37:11,606 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 25 [2022-07-22 10:37:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:37:11,607 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-22 10:37:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2022-07-22 10:37:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-22 10:37:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:37:11,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:37:11,609 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:37:11,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:37:11,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 10:37:11,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:37:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:37:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 3 times [2022-07-22 10:37:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:37:11,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519111332] [2022-07-22 10:37:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:37:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 10:37:12,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:37:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519111332] [2022-07-22 10:37:12,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519111332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:37:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493452421] [2022-07-22 10:37:12,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:37:12,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:37:12,024 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) [2022-07-22 10:37:12,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:37:14,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 10:37:14,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:37:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:37:14,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:37:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 10:37:14,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:37:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 10:37:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493452421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:37:14,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:37:14,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-22 10:37:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227668748] [2022-07-22 10:37:14,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:37:14,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 10:37:14,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:37:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 10:37:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:37:14,378 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:37:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:37:14,703 INFO L93 Difference]: Finished difference Result 256 states and 283 transitions. [2022-07-22 10:37:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 10:37:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-22 10:37:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:37:14,706 INFO L225 Difference]: With dead ends: 256 [2022-07-22 10:37:14,706 INFO L226 Difference]: Without dead ends: 227 [2022-07-22 10:37:14,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:37:14,708 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 385 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:37:14,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 101 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:37:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-22 10:37:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 100. [2022-07-22 10:37:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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) [2022-07-22 10:37:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-07-22 10:37:14,721 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 49 [2022-07-22 10:37:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:37:14,721 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-07-22 10:37:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:37:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-07-22 10:37:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 10:37:14,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:37:14,725 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:37:14,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:37:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:14,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:37:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:37:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash -500972291, now seen corresponding path program 4 times [2022-07-22 10:37:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:37:14,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34154025] [2022-07-22 10:37:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:37:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-22 10:37:15,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:37:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34154025] [2022-07-22 10:37:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34154025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:37:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711508178] [2022-07-22 10:37:15,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:37:15,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:15,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:37:15,373 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) [2022-07-22 10:37:15,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:37:15,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:37:15,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:37:15,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 10:37:15,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:37:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-22 10:37:15,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:37:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-22 10:37:16,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711508178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:37:16,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:37:16,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-22 10:37:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819969340] [2022-07-22 10:37:16,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:37:16,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 10:37:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:37:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 10:37:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 10:37:16,398 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 49 states have internal predecessors, (104), 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) [2022-07-22 10:37:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:37:17,219 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2022-07-22 10:37:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 10:37:17,219 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 49 states have internal predecessors, (104), 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 97 [2022-07-22 10:37:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:37:17,221 INFO L225 Difference]: With dead ends: 520 [2022-07-22 10:37:17,222 INFO L226 Difference]: Without dead ends: 467 [2022-07-22 10:37:17,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 10:37:17,224 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 987 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:37:17,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 195 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 10:37:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-22 10:37:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 196. [2022-07-22 10:37:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 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) [2022-07-22 10:37:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-07-22 10:37:17,241 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 97 [2022-07-22 10:37:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:37:17,242 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-07-22 10:37:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 49 states have internal predecessors, (104), 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) [2022-07-22 10:37:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-07-22 10:37:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-22 10:37:17,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:37:17,246 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:37:17,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:37:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:17,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:37:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:37:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1630342813, now seen corresponding path program 5 times [2022-07-22 10:37:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:37:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547056782] [2022-07-22 10:37:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:37:17,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:37:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:37:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-07-22 10:37:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:37:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547056782] [2022-07-22 10:37:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547056782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:37:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141460640] [2022-07-22 10:37:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:37:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:37:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:37:18,702 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) [2022-07-22 10:37:18,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process