./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/res2o.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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:27:16,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:27:16,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:27:16,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:27:16,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:27:16,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:27:16,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:27:16,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:27:16,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:27:16,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:27:16,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:27:16,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:27:16,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:27:16,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:27:16,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:27:16,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:27:16,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:27:16,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:27:16,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:27:16,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:27:16,924 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:27:16,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:27:16,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:27:16,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:27:16,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:27:16,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:27:16,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:27:16,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:27:16,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:27:16,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:27:16,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:27:16,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:27:16,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:27:16,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:27:16,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:27:16,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:27:16,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:27:16,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:27:16,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:27:16,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:27:16,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:27:16,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:27:16,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:27:16,960 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:27:16,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:27:16,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:27:16,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:27:16,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:27:16,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:27:16,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:27:16,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:27:16,962 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:27:16,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:27:16,962 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:27:16,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:27:16,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:27:16,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:27:16,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:27:16,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:27:16,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:27:16,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:27:16,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:27:16,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:27:16,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:27:16,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:27:16,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:27:16,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:27:16,979 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:27:16,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:27:16,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:27:16,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2022-07-11 23:27:17,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:27:17,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:27:17,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:27:17,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:27:17,228 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:27:17,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2o.c [2022-07-11 23:27:17,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e7539868/e09feba7d96848719d43f11ec0c4968e/FLAG94764e322 [2022-07-11 23:27:17,682 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:27:17,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2o.c [2022-07-11 23:27:17,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e7539868/e09feba7d96848719d43f11ec0c4968e/FLAG94764e322 [2022-07-11 23:27:17,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e7539868/e09feba7d96848719d43f11ec0c4968e [2022-07-11 23:27:17,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:27:17,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:27:17,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:27:17,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:27:17,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:27:17,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:17,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9ff086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17, skipping insertion in model container [2022-07-11 23:27:17,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:17,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:27:17,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:27:17,906 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/res2o.c[588,601] [2022-07-11 23:27:17,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:27:17,932 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:27:17,942 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/res2o.c[588,601] [2022-07-11 23:27:17,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:27:17,961 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:27:17,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17 WrapperNode [2022-07-11 23:27:17,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:27:17,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:27:17,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:27:17,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:27:17,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:17,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:17,993 INFO L137 Inliner]: procedures = 17, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2022-07-11 23:27:17,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:27:17,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:27:17,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:27:17,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:27:18,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:27:18,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:27:18,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:27:18,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:27:18,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (1/1) ... [2022-07-11 23:27:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:27:18,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:18,059 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) [2022-07-11 23:27:18,068 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 [2022-07-11 23:27:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:27:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:27:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 23:27:18,142 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:27:18,143 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:27:18,363 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:27:18,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:27:18,368 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-11 23:27:18,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:27:18 BoogieIcfgContainer [2022-07-11 23:27:18,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:27:18,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:27:18,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:27:18,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:27:18,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:27:17" (1/3) ... [2022-07-11 23:27:18,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149df7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:27:18, skipping insertion in model container [2022-07-11 23:27:18,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:27:17" (2/3) ... [2022-07-11 23:27:18,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149df7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:27:18, skipping insertion in model container [2022-07-11 23:27:18,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:27:18" (3/3) ... [2022-07-11 23:27:18,391 INFO L111 eAbstractionObserver]: Analyzing ICFG res2o.c [2022-07-11 23:27:18,402 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:27:18,415 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:27:18,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:27:18,482 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@61fbe4d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37a77890 [2022-07-11 23:27:18,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:27:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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) [2022-07-11 23:27:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:27:18,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:18,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:18,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2022-07-11 23:27:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:18,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308830603] [2022-07-11 23:27:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:18,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308830603] [2022-07-11 23:27:18,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308830603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:27:18,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:27:18,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:27:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81492038] [2022-07-11 23:27:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:27:18,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:27:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:27:18,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:27:18,716 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 9.5) internal successors, (19), 2 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) [2022-07-11 23:27:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:18,733 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-07-11 23:27:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:27:18,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) Word has length 19 [2022-07-11 23:27:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:18,741 INFO L225 Difference]: With dead ends: 56 [2022-07-11 23:27:18,742 INFO L226 Difference]: Without dead ends: 26 [2022-07-11 23:27:18,745 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 [2022-07-11 23:27:18,748 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-07-11 23:27:18,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:27:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-11 23:27:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-11 23:27:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2022-07-11 23:27:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-11 23:27:18,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2022-07-11 23:27:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:18,780 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-11 23:27:18,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2022-07-11 23:27:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-11 23:27:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:27:18,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:18,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:18,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:27:18,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2022-07-11 23:27:18,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:18,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370723039] [2022-07-11 23:27:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:18,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:18,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:18,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370723039] [2022-07-11 23:27:18,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370723039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:27:18,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:27:18,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:27:18,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954456800] [2022-07-11 23:27:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:27:18,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:27:18,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:27:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:27:18,935 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2022-07-11 23:27:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:19,040 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-11 23:27:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:27:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) Word has length 19 [2022-07-11 23:27:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:19,043 INFO L225 Difference]: With dead ends: 57 [2022-07-11 23:27:19,044 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:27:19,046 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 [2022-07-11 23:27:19,047 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:19,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:27:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:27:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-07-11 23:27:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2022-07-11 23:27:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-11 23:27:19,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2022-07-11 23:27:19,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:19,059 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-11 23:27:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2022-07-11 23:27:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-11 23:27:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 23:27:19,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:19,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:27:19,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2022-07-11 23:27:19,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:19,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018329181] [2022-07-11 23:27:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:20,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:20,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018329181] [2022-07-11 23:27:20,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018329181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106538310] [2022-07-11 23:27:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:20,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:20,314 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) [2022-07-11 23:27:20,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:27:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-11 23:27:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:20,502 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 18 treesize of output 16 [2022-07-11 23:27:20,524 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 11 treesize of output 7 [2022-07-11 23:27:20,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:20,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:27:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:20,781 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-11 23:27:20,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-07-11 23:27:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,007 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:27:21,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2022-07-11 23:27:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,270 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:27:21,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 46 [2022-07-11 23:27:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-07-11 23:27:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-07-11 23:27:21,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:21,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2022-07-11 23:27:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:21,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:27:29,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:29,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106538310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:27:29,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:27:29,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-07-11 23:27:29,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706744983] [2022-07-11 23:27:29,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:27:29,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-11 23:27:29,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-11 23:27:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1373, Unknown=2, NotChecked=0, Total=1640 [2022-07-11 23:27:29,755 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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) [2022-07-11 23:27:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:31,442 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-07-11 23:27:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 23:27:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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 31 [2022-07-11 23:27:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:31,444 INFO L225 Difference]: With dead ends: 63 [2022-07-11 23:27:31,444 INFO L226 Difference]: Without dead ends: 59 [2022-07-11 23:27:31,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 39 SyntacticMatches, 16 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=597, Invalid=2593, Unknown=2, NotChecked=0, Total=3192 [2022-07-11 23:27:31,446 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:31,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 121 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 215 Invalid, 0 Unknown, 295 Unchecked, 0.3s Time] [2022-07-11 23:27:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-11 23:27:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2022-07-11 23:27:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-07-11 23:27:31,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2022-07-11 23:27:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:31,459 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-07-11 23:27:31,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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) [2022-07-11 23:27:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-07-11 23:27:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 23:27:31,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:31,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:31,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:27:31,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:31,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2022-07-11 23:27:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:31,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68099197] [2022-07-11 23:27:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:27:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:31,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68099197] [2022-07-11 23:27:31,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68099197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:31,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969440553] [2022-07-11 23:27:31,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:27:31,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:31,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:31,796 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) [2022-07-11 23:27:31,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:27:31,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:27:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:27:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:27:31,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:27:31,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:27:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:27:31,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969440553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:27:31,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:27:31,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:27:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898054916] [2022-07-11 23:27:31,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:27:31,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:27:31,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:27:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:27:31,979 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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) [2022-07-11 23:27:32,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:32,182 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-07-11 23:27:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:27:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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 33 [2022-07-11 23:27:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:32,184 INFO L225 Difference]: With dead ends: 116 [2022-07-11 23:27:32,184 INFO L226 Difference]: Without dead ends: 62 [2022-07-11 23:27:32,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:27:32,185 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:32,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 31 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:27:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-11 23:27:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-11 23:27:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 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) [2022-07-11 23:27:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-11 23:27:32,194 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 33 [2022-07-11 23:27:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:32,194 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-11 23:27:32,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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) [2022-07-11 23:27:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-11 23:27:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:27:32,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:32,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:32,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:27:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 23:27:32,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -284383476, now seen corresponding path program 3 times [2022-07-11 23:27:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113161845] [2022-07-11 23:27:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:27:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113161845] [2022-07-11 23:27:32,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113161845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536178359] [2022-07-11 23:27:32,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:27:32,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:32,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:32,516 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) [2022-07-11 23:27:32,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:27:32,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:27:32,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:27:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:27:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:27:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:27:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:27:32,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536178359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:27:32,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:27:32,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:27:32,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701011559] [2022-07-11 23:27:32,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:27:32,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:27:32,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:27:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:27:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:27:32,730 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2022-07-11 23:27:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:27:32,929 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-07-11 23:27:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:27:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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 39 [2022-07-11 23:27:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:27:32,931 INFO L225 Difference]: With dead ends: 57 [2022-07-11 23:27:32,931 INFO L226 Difference]: Without dead ends: 49 [2022-07-11 23:27:32,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:27:32,932 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:27:32,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:27:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-11 23:27:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-07-11 23:27:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:27:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-07-11 23:27:32,939 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2022-07-11 23:27:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:27:32,939 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-07-11 23:27:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2022-07-11 23:27:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-07-11 23:27:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:27:32,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:27:32,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:27:32,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:27:33,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:33,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:27:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:27:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2022-07-11 23:27:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:27:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083743509] [2022-07-11 23:27:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:27:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:27:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:27:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:36,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:27:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083743509] [2022-07-11 23:27:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083743509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:27:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901350074] [2022-07-11 23:27:36,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:27:36,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:27:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:27:36,332 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) [2022-07-11 23:27:36,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:27:36,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:27:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:27:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-11 23:27:36,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:27:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:36,452 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:27:36,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:27:36,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:27:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:36,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:27:36,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:36,767 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 28 treesize of output 30 [2022-07-11 23:27:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-07-11 23:27:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-07-11 23:27:37,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-07-11 23:27:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:37,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 74 [2022-07-11 23:27:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 86 [2022-07-11 23:27:38,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:38,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2022-07-11 23:27:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:39,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 86 [2022-07-11 23:27:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2022-07-11 23:27:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:27:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:39,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 86 [2022-07-11 23:27:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:40,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-07-11 23:27:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:27:40,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-07-11 23:27:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:27:40,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:30:34,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_ArrVal_335 Int) (v_ArrVal_344 Int) (v_ArrVal_332 Int) (v_ArrVal_342 Int) (v_ArrVal_330 Int) (v_ArrVal_340 Int) (v_ArrVal_328 Int) (v_ArrVal_339 Int) (v_ArrVal_337 Int) (v_ArrVal_347 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4)) (.cse3 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse0 (let ((.cse4 (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_328)))) (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| v_ArrVal_330) .cse3 v_ArrVal_332))))) (store .cse4 |c_ULTIMATE.start_main_~c~0#1.base| (store (store (select .cse4 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| v_ArrVal_335) .cse2 v_ArrVal_337))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_328 1)) (not (<= v_ArrVal_339 (+ (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (not (<= v_ArrVal_342 (+ v_ArrVal_340 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_340)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_330 1)) (not (<= v_ArrVal_332 1)) (not (<= v_ArrVal_340 (+ v_ArrVal_339 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_339)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (<= (+ v_ArrVal_347 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_347)) |c_ULTIMATE.start_main_~c~0#1.base|) .cse2)) (* 3 ~N~0)) (not (<= v_ArrVal_335 1)) (not (<= v_ArrVal_344 (+ v_ArrVal_342 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_342)) |c_ULTIMATE.start_main_~b~0#1.base|) .cse3)))) (not (<= v_ArrVal_347 (+ v_ArrVal_344 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_344)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (not (<= v_ArrVal_337 1))))))) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2022-07-11 23:31:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 4 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-11 23:31:51,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901350074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:31:51,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:31:51,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 27] total 82 [2022-07-11 23:31:51,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485390897] [2022-07-11 23:31:51,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:31:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-11 23:31:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:31:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-11 23:31:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=5873, Unknown=82, NotChecked=158, Total=6642 [2022-07-11 23:31:51,560 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 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)