./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-fpi/brs4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 727a45fc5966747e99c4394c0114e789db4ba39dd55af3d2c235925ac8282f92 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:24:20,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:24:20,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:24:20,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:24:20,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:24:20,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:24:20,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:24:20,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:24:20,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:24:20,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:24:20,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:24:20,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:24:20,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:24:20,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:24:20,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:24:20,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:24:20,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:24:20,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:24:20,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:24:20,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:24:20,688 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:24:20,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:24:20,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:24:20,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:24:20,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:24:20,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:24:20,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:24:20,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:24:20,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:24:20,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:24:20,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:24:20,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:24:20,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:24:20,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:24:20,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:24:20,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:24:20,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:24:20,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:24:20,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:24:20,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:24:20,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:24:20,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:24:20,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:24:20,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:24:20,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:24:20,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:24:20,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:24:20,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:24:20,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:24:20,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:24:20,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:24:20,737 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:24:20,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:24:20,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:24:20,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:24:20,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:24:20,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:24:20,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:24:20,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:24:20,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:24:20,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:24:20,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:24:20,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:24:20,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:24:20,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:24:20,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:24:20,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:24:20,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:24:20,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:24:20,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:24:20,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:24:20,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:24:20,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:24:20,742 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:24:20,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:24:20,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:24:20,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 727a45fc5966747e99c4394c0114e789db4ba39dd55af3d2c235925ac8282f92 [2022-07-19 10:24:20,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:24:20,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:24:20,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:24:20,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:24:20,986 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:24:20,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs4.c [2022-07-19 10:24:21,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385cdb1e6/3ebf49381f7c45ab927bd01193e08bed/FLAG252a38e97 [2022-07-19 10:24:21,449 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:24:21,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4.c [2022-07-19 10:24:21,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385cdb1e6/3ebf49381f7c45ab927bd01193e08bed/FLAG252a38e97 [2022-07-19 10:24:21,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385cdb1e6/3ebf49381f7c45ab927bd01193e08bed [2022-07-19 10:24:21,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:24:21,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:24:21,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:24:21,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:24:21,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:24:21,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:24:21" (1/1) ... [2022-07-19 10:24:21,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279de31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:21, skipping insertion in model container [2022-07-19 10:24:21,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:24:21" (1/1) ... [2022-07-19 10:24:21,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:24:21,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:24:22,008 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-fpi/brs4.c[587,600] [2022-07-19 10:24:22,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:24:22,029 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:24:22,037 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-fpi/brs4.c[587,600] [2022-07-19 10:24:22,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:24:22,053 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:24:22,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22 WrapperNode [2022-07-19 10:24:22,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:24:22,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:24:22,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:24:22,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:24:22,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,078 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-07-19 10:24:22,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:24:22,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:24:22,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:24:22,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:24:22,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:24:22,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:24:22,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:24:22,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:24:22,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (1/1) ... [2022-07-19 10:24:22,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:24:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:24:22,137 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) [2022-07-19 10:24:22,141 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 [2022-07-19 10:24:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:24:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:24:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:24:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:24:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:24:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:24:22,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:24:22,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:24:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:24:22,223 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:24:22,225 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:24:22,371 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:24:22,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:24:22,376 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 10:24:22,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:24:22 BoogieIcfgContainer [2022-07-19 10:24:22,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:24:22,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:24:22,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:24:22,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:24:22,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:24:21" (1/3) ... [2022-07-19 10:24:22,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c9f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:24:22, skipping insertion in model container [2022-07-19 10:24:22,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:24:22" (2/3) ... [2022-07-19 10:24:22,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c9f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:24:22, skipping insertion in model container [2022-07-19 10:24:22,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:24:22" (3/3) ... [2022-07-19 10:24:22,395 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4.c [2022-07-19 10:24:22,406 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:24:22,408 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:24:22,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:24:22,498 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@4984d219, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f11200 [2022-07-19 10:24:22,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:24:22,508 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) [2022-07-19 10:24:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:24:22,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:22,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:22,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2022-07-19 10:24:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:22,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642241716] [2022-07-19 10:24:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:22,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:22,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:22,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642241716] [2022-07-19 10:24:22,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642241716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:24:22,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:24:22,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:24:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843950415] [2022-07-19 10:24:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:24:22,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:24:22,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:24:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:24:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:24:22,709 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-19 10:24:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:24:22,721 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-07-19 10:24:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:24:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-07-19 10:24:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:24:22,729 INFO L225 Difference]: With dead ends: 36 [2022-07-19 10:24:22,730 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 10:24:22,733 INFO L412 NwaCegarLoop]: 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 [2022-07-19 10:24:22,739 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-19 10:24:22,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:24:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 10:24:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-19 10:24:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-07-19 10:24:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-19 10:24:22,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-07-19 10:24:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:24:22,765 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-19 10:24:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-19 10:24:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-19 10:24:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 10:24:22,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:22,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:24:22,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:22,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2022-07-19 10:24:22,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:22,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733891618] [2022-07-19 10:24:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:22,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:22,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:22,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733891618] [2022-07-19 10:24:22,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733891618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:24:22,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:24:22,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:24:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63461819] [2022-07-19 10:24:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:24:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:24:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:24:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:24:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:24:22,893 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-19 10:24:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:24:22,953 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-07-19 10:24:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:24:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-07-19 10:24:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:24:22,955 INFO L225 Difference]: With dead ends: 33 [2022-07-19 10:24:22,956 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 10:24:22,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:24:22,957 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:24:22,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:24:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 10:24:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-19 10:24:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-19 10:24:22,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2022-07-19 10:24:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:24:22,966 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-19 10:24:22,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-19 10:24:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-19 10:24:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 10:24:22,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:22,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:22,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:24:22,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2022-07-19 10:24:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:22,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710691343] [2022-07-19 10:24:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:22,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:24:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710691343] [2022-07-19 10:24:23,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710691343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:24:23,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:24:23,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:24:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802056151] [2022-07-19 10:24:23,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:24:23,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:24:23,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:24:23,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:24:23,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:24:23,070 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-19 10:24:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:24:23,128 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-07-19 10:24:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:24:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 10:24:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:24:23,131 INFO L225 Difference]: With dead ends: 27 [2022-07-19 10:24:23,131 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 10:24:23,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:24:23,137 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:24:23,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:24:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 10:24:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-19 10:24:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-19 10:24:23,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-07-19 10:24:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:24:23,146 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-19 10:24:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-19 10:24:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-19 10:24:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:24:23,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:23,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:24:23,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2022-07-19 10:24:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:23,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430060420] [2022-07-19 10:24:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:23,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:23,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:23,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430060420] [2022-07-19 10:24:23,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430060420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:24:23,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958084205] [2022-07-19 10:24:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:23,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:24:23,274 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) [2022-07-19 10:24:23,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:24:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:24:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:24:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:23,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:24:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:23,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958084205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:24:23,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:24:23,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 10:24:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73330949] [2022-07-19 10:24:23,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:24:23,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:24:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:24:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:24:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:24:23,482 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:24:23,563 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-07-19 10:24:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:24:23,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 10:24:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:24:23,564 INFO L225 Difference]: With dead ends: 43 [2022-07-19 10:24:23,564 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 10:24:23,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:24:23,566 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:24:23,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:24:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 10:24:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-19 10:24:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-19 10:24:23,569 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2022-07-19 10:24:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:24:23,569 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-19 10:24:23,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-19 10:24:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 10:24:23,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:23,570 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:23,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:24:23,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:23,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2022-07-19 10:24:23,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:23,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948887244] [2022-07-19 10:24:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:23,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:24,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948887244] [2022-07-19 10:24:24,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948887244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:24:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342115780] [2022-07-19 10:24:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:24,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:24:24,101 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) [2022-07-19 10:24:24,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:24:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 10:24:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:24:24,185 INFO L390 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 [2022-07-19 10:24:24,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-07-19 10:24:24,334 INFO L390 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 29 treesize of output 28 [2022-07-19 10:24:24,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-19 10:24:24,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-07-19 10:24:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:24,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:24:27,344 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_73 Int)) (or (not (<= v_ArrVal_73 0)) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_73)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_73) (* c_~N~0 4)))) is different from false [2022-07-19 10:24:27,372 INFO L390 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 222 treesize of output 210 [2022-07-19 10:24:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-19 10:24:29,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342115780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:24:29,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:24:29,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-07-19 10:24:29,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623787723] [2022-07-19 10:24:29,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:24:29,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 10:24:29,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:24:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 10:24:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=537, Unknown=2, NotChecked=48, Total=702 [2022-07-19 10:24:29,525 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:24:29,736 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-07-19 10:24:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:24:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 10:24:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:24:29,737 INFO L225 Difference]: With dead ends: 49 [2022-07-19 10:24:29,737 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 10:24:29,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=175, Invalid=697, Unknown=2, NotChecked=56, Total=930 [2022-07-19 10:24:29,738 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:24:29,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-07-19 10:24:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 10:24:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-19 10:24:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-07-19 10:24:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-07-19 10:24:29,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2022-07-19 10:24:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:24:29,741 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-07-19 10:24:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:24:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-07-19 10:24:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:24:29,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:29,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:29,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:24:29,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:29,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2022-07-19 10:24:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37290307] [2022-07-19 10:24:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:29,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:30,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:30,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37290307] [2022-07-19 10:24:30,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37290307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:24:30,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8831649] [2022-07-19 10:24:30,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:24:30,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:30,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:24:30,016 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) [2022-07-19 10:24:30,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:24:30,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:24:30,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:24:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:24:30,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:24:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:24:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8831649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:24:30,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:24:30,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 10:24:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020728726] [2022-07-19 10:24:30,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:24:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:24:30,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:24:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:24:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:24:30,181 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2022-07-19 10:24:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:24:30,330 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-19 10:24:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:24:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 26 [2022-07-19 10:24:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:24:30,331 INFO L225 Difference]: With dead ends: 62 [2022-07-19 10:24:30,331 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 10:24:30,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:24:30,332 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:24:30,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:24:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 10:24:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-07-19 10:24:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2022-07-19 10:24:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-19 10:24:30,336 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2022-07-19 10:24:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:24:30,336 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-19 10:24:30,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2022-07-19 10:24:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-19 10:24:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 10:24:30,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:24:30,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:24:30,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:24:30,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:30,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:24:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:24:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 3 times [2022-07-19 10:24:30,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:24:30,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097956784] [2022-07-19 10:24:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:24:30,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:24:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:24:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:24:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:24:31,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097956784] [2022-07-19 10:24:31,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097956784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:24:31,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759246832] [2022-07-19 10:24:31,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:24:31,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:24:31,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:24:31,053 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) [2022-07-19 10:24:31,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:24:31,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 10:24:31,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:24:31,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 10:24:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:24:31,163 INFO L390 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 [2022-07-19 10:24:31,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:24:31,286 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 10:24:31,286 INFO L390 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-19 10:24:35,450 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:24:35,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-07-19 10:24:35,524 INFO L356 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-07-19 10:24:35,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2022-07-19 10:24:35,702 INFO L356 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2022-07-19 10:24:35,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 68 [2022-07-19 10:24:42,544 INFO L356 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2022-07-19 10:24:42,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 21 [2022-07-19 10:24:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:24:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:27,218 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-19 10:25:27,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2688 treesize of output 2606 [2022-07-19 10:25:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:25:27,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759246832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:27,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:27,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 49 [2022-07-19 10:25:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98599188] [2022-07-19 10:25:27,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:27,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 10:25:27,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 10:25:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1961, Unknown=24, NotChecked=0, Total=2352 [2022-07-19 10:25:27,852 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 49 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 49 states have internal predecessors, (78), 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) [2022-07-19 10:25:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:57,024 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-07-19 10:25:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 10:25:57,024 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 49 states have internal predecessors, (78), 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 29 [2022-07-19 10:25:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:57,026 INFO L225 Difference]: With dead ends: 87 [2022-07-19 10:25:57,026 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 10:25:57,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 84.7s TimeCoverageRelationStatistics Valid=668, Invalid=3585, Unknown=37, NotChecked=0, Total=4290 [2022-07-19 10:25:57,028 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:57,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 77 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-07-19 10:25:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 10:25:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2022-07-19 10:25:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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) [2022-07-19 10:25:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-19 10:25:57,040 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 29 [2022-07-19 10:25:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:57,041 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-19 10:25:57,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 49 states have internal predecessors, (78), 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) [2022-07-19 10:25:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-19 10:25:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:25:57,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:57,042 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:57,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:57,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:57,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 4 times [2022-07-19 10:25:57,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:57,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700432664] [2022-07-19 10:25:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:57,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700432664] [2022-07-19 10:25:57,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700432664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251036516] [2022-07-19 10:25:57,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:25:57,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:57,340 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) [2022-07-19 10:25:57,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:25:57,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:25:57,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:25:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:57,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:25:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251036516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:25:57,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:25:57,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 10:25:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218435647] [2022-07-19 10:25:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:25:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:25:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:25:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:25:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:25:57,509 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:25:57,752 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-07-19 10:25:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 10:25:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 10:25:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:25:57,753 INFO L225 Difference]: With dead ends: 108 [2022-07-19 10:25:57,753 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 10:25:57,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2022-07-19 10:25:57,754 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:25:57,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 37 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:25:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 10:25:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2022-07-19 10:25:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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) [2022-07-19 10:25:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-19 10:25:57,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 32 [2022-07-19 10:25:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:25:57,766 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-19 10:25:57,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:25:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-19 10:25:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:25:57,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:25:57,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:25:57,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:25:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:57,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:25:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:25:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 5 times [2022-07-19 10:25:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:25:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873200462] [2022-07-19 10:25:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:25:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:25:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:25:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:25:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873200462] [2022-07-19 10:25:58,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873200462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:25:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956013845] [2022-07-19 10:25:58,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:25:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:25:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:25:58,797 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) [2022-07-19 10:25:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:25:58,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:25:58,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:25:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 10:25:58,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:25:58,877 INFO L390 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 [2022-07-19 10:25:58,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:25:58,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:58,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-19 10:25:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2022-07-19 10:25:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-07-19 10:25:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:25:59,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2022-07-19 10:25:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:25:59,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 60 [2022-07-19 10:25:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 10:25:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 54 [2022-07-19 10:25:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:25:59,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2022-07-19 10:25:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:25:59,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:26:01,624 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_243 Int) (v_ArrVal_240 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_238 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_240 (+ v_ArrVal_238 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_238)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_243 (+ v_ArrVal_240 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_240)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_238 0)) (<= (div (+ (* v_ArrVal_243 (- 1)) (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_243)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (- 4)) 4)))) is different from false [2022-07-19 10:26:14,455 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_236 Int) (v_ArrVal_234 Int) (v_ArrVal_243 Int) (v_ArrVal_240 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_238 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_234) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_236))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_240 (+ v_ArrVal_238 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_238)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_234 0)) (<= (div (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_243)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* v_ArrVal_243 (- 1))) (- 4)) 4) (not (<= v_ArrVal_238 0)) (not (<= v_ArrVal_236 0)) (not (<= v_ArrVal_243 (+ v_ArrVal_240 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_240)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))))))) is different from false [2022-07-19 10:26:19,098 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-19 10:26:19,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24102 treesize of output 23802