./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ncomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/ncomp.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 c3d1ff002f6e6cf179cc6204a129c133a3beda704ea9fff27ad69a10f5c1f33d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:10:25,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:10:25,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:10:25,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:10:25,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:10:25,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:10:25,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:10:25,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:10:25,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:10:25,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:10:25,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:10:25,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:10:25,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:10:25,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:10:25,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:10:25,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:10:25,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:10:25,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:10:25,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:10:25,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:10:25,996 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:10:25,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:10:25,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:10:25,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:10:26,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:10:26,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:10:26,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:10:26,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:10:26,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:10:26,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:10:26,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:10:26,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:10:26,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:10:26,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:10:26,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:10:26,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:10:26,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:10:26,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:10:26,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:10:26,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:10:26,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:10:26,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:10:26,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:10:26,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:10:26,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:10:26,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:10:26,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:10:26,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:10:26,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:10:26,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:10:26,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:10:26,042 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:10:26,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:10:26,043 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:10:26,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:10:26,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:10:26,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:10:26,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:10:26,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:10:26,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:10:26,044 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:10:26,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:10:26,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:10:26,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:10:26,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:10:26,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:10:26,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:10:26,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:10:26,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:10:26,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:10:26,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:10:26,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:10:26,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:10:26,047 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:10:26,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:10:26,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:10:26,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3d1ff002f6e6cf179cc6204a129c133a3beda704ea9fff27ad69a10f5c1f33d [2022-07-13 11:10:26,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:10:26,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:10:26,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:10:26,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:10:26,251 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:10:26,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ncomp.c [2022-07-13 11:10:26,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367e6c8a1/c89ef8d6c2fb4c2a82238b5acf4a98f0/FLAG5f450870e [2022-07-13 11:10:26,654 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:10:26,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c [2022-07-13 11:10:26,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367e6c8a1/c89ef8d6c2fb4c2a82238b5acf4a98f0/FLAG5f450870e [2022-07-13 11:10:27,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367e6c8a1/c89ef8d6c2fb4c2a82238b5acf4a98f0 [2022-07-13 11:10:27,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:10:27,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:10:27,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:10:27,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:10:27,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:10:27,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c9769e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27, skipping insertion in model container [2022-07-13 11:10:27,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:10:27,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:10:27,216 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/ncomp.c[588,601] [2022-07-13 11:10:27,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:10:27,235 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:10:27,243 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/ncomp.c[588,601] [2022-07-13 11:10:27,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:10:27,258 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:10:27,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27 WrapperNode [2022-07-13 11:10:27,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:10:27,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:10:27,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:10:27,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:10:27,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,283 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-07-13 11:10:27,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:10:27,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:10:27,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:10:27,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:10:27,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:10:27,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:10:27,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:10:27,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:10:27,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (1/1) ... [2022-07-13 11:10:27,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:10:27,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:27,351 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) [2022-07-13 11:10:27,368 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 [2022-07-13 11:10:27,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:10:27,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:10:27,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:10:27,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:10:27,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:10:27,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:10:27,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:10:27,434 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:10:27,435 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:10:27,544 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:10:27,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:10:27,548 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 11:10:27,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:10:27 BoogieIcfgContainer [2022-07-13 11:10:27,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:10:27,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:10:27,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:10:27,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:10:27,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:10:27" (1/3) ... [2022-07-13 11:10:27,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17419aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:10:27, skipping insertion in model container [2022-07-13 11:10:27,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:10:27" (2/3) ... [2022-07-13 11:10:27,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17419aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:10:27, skipping insertion in model container [2022-07-13 11:10:27,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:10:27" (3/3) ... [2022-07-13 11:10:27,585 INFO L111 eAbstractionObserver]: Analyzing ICFG ncomp.c [2022-07-13 11:10:27,600 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:10:27,600 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:10:27,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:10:27,642 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@1fe47885, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7333df3e [2022-07-13 11:10:27,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:10:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2022-07-13 11:10:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:10:27,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:27,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:27,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-07-13 11:10:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:27,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306048410] [2022-07-13 11:10:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306048410] [2022-07-13 11:10:27,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306048410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:10:27,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:10:27,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:10:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012088201] [2022-07-13 11:10:27,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:10:27,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:10:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:10:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:10:27,824 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-07-13 11:10:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:27,837 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-07-13 11:10:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:10:27,839 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2022-07-13 11:10:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:27,844 INFO L225 Difference]: With dead ends: 44 [2022-07-13 11:10:27,844 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 11:10:27,846 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 [2022-07-13 11:10:27,852 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-07-13 11:10:27,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:10:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 11:10:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-13 11:10:27,878 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) [2022-07-13 11:10:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-13 11:10:27,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-07-13 11:10:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:27,880 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-13 11:10:27,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-07-13 11:10:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-13 11:10:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:10:27,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:27,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:27,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:10:27,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-07-13 11:10:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:27,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364284048] [2022-07-13 11:10:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:27,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:27,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:27,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523195614] [2022-07-13 11:10:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:27,972 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) [2022-07-13 11:10:27,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:10:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 11:10:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:28,174 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-13 11:10:28,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2022-07-13 11:10:28,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:10:28,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:10:28,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:10:28,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:28,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:28,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2022-07-13 11:10:28,826 INFO L356 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2022-07-13 11:10:28,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 24 [2022-07-13 11:10:28,842 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 5 treesize of output 3 [2022-07-13 11:10:28,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-13 11:10:28,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:28,896 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 48 treesize of output 11 [2022-07-13 11:10:28,900 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 5 treesize of output 3 [2022-07-13 11:10:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:28,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 5 [2022-07-13 11:10:28,942 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 5 treesize of output 3 [2022-07-13 11:10:29,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-07-13 11:10:29,068 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 5 treesize of output 3 [2022-07-13 11:10:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:10:29,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364284048] [2022-07-13 11:10:29,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523195614] [2022-07-13 11:10:29,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523195614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:10:29,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:10:29,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:10:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649248313] [2022-07-13 11:10:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:10:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:10:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:10:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:10:29,131 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-13 11:10:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:29,183 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-13 11:10:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:10:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-07-13 11:10:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:29,184 INFO L225 Difference]: With dead ends: 39 [2022-07-13 11:10:29,184 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 11:10:29,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:10:29,185 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:29,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:10:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 11:10:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-07-13 11:10:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2022-07-13 11:10:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-13 11:10:29,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2022-07-13 11:10:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:29,190 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-13 11:10:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-13 11:10:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-13 11:10:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:10:29,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:29,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:29,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:29,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:29,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1850906398, now seen corresponding path program 1 times [2022-07-13 11:10:29,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:29,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499599835] [2022-07-13 11:10:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:29,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:29,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228022962] [2022-07-13 11:10:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:29,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:29,435 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) [2022-07-13 11:10:29,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:10:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:10:29,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:10:29,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499599835] [2022-07-13 11:10:29,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228022962] [2022-07-13 11:10:29,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228022962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:10:29,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:10:29,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:10:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284446609] [2022-07-13 11:10:29,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:10:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:10:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:10:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:10:29,563 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-07-13 11:10:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:29,640 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-07-13 11:10:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:10:29,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 11:10:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:29,642 INFO L225 Difference]: With dead ends: 62 [2022-07-13 11:10:29,642 INFO L226 Difference]: Without dead ends: 50 [2022-07-13 11:10:29,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:10:29,645 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:29,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:10:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-13 11:10:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2022-07-13 11:10:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2022-07-13 11:10:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-13 11:10:29,655 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-07-13 11:10:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:29,655 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-13 11:10:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-07-13 11:10:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-13 11:10:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:10:29,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:29,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:29,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:29,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 11:10:29,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2022-07-13 11:10:29,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:29,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962648737] [2022-07-13 11:10:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:29,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:29,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70728087] [2022-07-13 11:10:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:29,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:29,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:29,920 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) [2022-07-13 11:10:29,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:10:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:10:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:29,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962648737] [2022-07-13 11:10:29,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:29,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70728087] [2022-07-13 11:10:29,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70728087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:29,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:10:29,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-13 11:10:29,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853175723] [2022-07-13 11:10:29,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:10:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:10:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:10:29,996 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:30,087 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-13 11:10:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:10:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 11:10:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:30,088 INFO L225 Difference]: With dead ends: 53 [2022-07-13 11:10:30,088 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 11:10:30,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:10:30,089 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 44 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:10:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 11:10:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-07-13 11:10:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-07-13 11:10:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-13 11:10:30,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2022-07-13 11:10:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:30,092 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-13 11:10:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-13 11:10:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 11:10:30,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:30,093 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:30,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1120615462, now seen corresponding path program 1 times [2022-07-13 11:10:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:30,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958316697] [2022-07-13 11:10:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:30,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:30,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632570423] [2022-07-13 11:10:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:30,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:30,328 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) [2022-07-13 11:10:30,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:10:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:30,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 11:10:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:30,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:10:30,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:30,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958316697] [2022-07-13 11:10:30,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:30,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632570423] [2022-07-13 11:10:30,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632570423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:10:30,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:10:30,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:10:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711809643] [2022-07-13 11:10:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:10:30,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:10:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:10:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:10:30,407 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:30,471 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-13 11:10:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:10:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 11:10:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:30,472 INFO L225 Difference]: With dead ends: 48 [2022-07-13 11:10:30,472 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 11:10:30,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:10:30,473 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:30,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:10:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 11:10:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-13 11:10:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-07-13 11:10:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-13 11:10:30,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-07-13 11:10:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:30,476 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-13 11:10:30,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-13 11:10:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:10:30,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:30,477 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] [2022-07-13 11:10:30,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-07-13 11:10:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659164160] [2022-07-13 11:10:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:30,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:30,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:30,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694302543] [2022-07-13 11:10:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:30,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:30,727 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) [2022-07-13 11:10:30,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:10:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 11:10:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:30,891 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-07-13 11:10:30,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-07-13 11:10:30,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:10:30,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:10:30,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-13 11:10:32,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,198 INFO L356 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2022-07-13 11:10:32,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 867 treesize of output 778 [2022-07-13 11:10:32,395 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 5 treesize of output 3 [2022-07-13 11:10:32,521 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 5 treesize of output 3 [2022-07-13 11:10:32,528 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 5 treesize of output 3 [2022-07-13 11:10:32,565 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-07-13 11:10:32,565 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 1 case distinctions, treesize of input 63 treesize of output 1 [2022-07-13 11:10:32,621 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 14 treesize of output 12 [2022-07-13 11:10:32,648 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 14 treesize of output 16 [2022-07-13 11:10:32,669 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 14 treesize of output 16 [2022-07-13 11:10:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,694 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 21 treesize of output 20 [2022-07-13 11:10:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:32,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:32,835 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) is different from false [2022-07-13 11:10:32,852 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int)) (v_ArrVal_289 (Array Int Int))) (= c_~N~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_289) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) is different from false [2022-07-13 11:10:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-13 11:10:32,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659164160] [2022-07-13 11:10:32,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694302543] [2022-07-13 11:10:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694302543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:32,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:10:32,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-13 11:10:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75380114] [2022-07-13 11:10:32,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:10:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:10:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=80, Unknown=2, NotChecked=38, Total=156 [2022-07-13 11:10:32,864 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2022-07-13 11:10:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:33,079 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-13 11:10:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:10:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 [2022-07-13 11:10:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:33,080 INFO L225 Difference]: With dead ends: 53 [2022-07-13 11:10:33,080 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 11:10:33,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=169, Unknown=2, NotChecked=58, Total=306 [2022-07-13 11:10:33,081 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:33,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-07-13 11:10:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 11:10:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2022-07-13 11:10:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2022-07-13 11:10:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-13 11:10:33,085 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2022-07-13 11:10:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:33,085 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-13 11:10:33,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2022-07-13 11:10:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-13 11:10:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 11:10:33,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:33,086 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] [2022-07-13 11:10:33,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:33,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2022-07-13 11:10:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370449550] [2022-07-13 11:10:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:33,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:33,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644870413] [2022-07-13 11:10:33,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:10:33,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:33,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:33,336 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) [2022-07-13 11:10:33,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:10:33,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:10:33,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:10:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:10:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:10:33,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:10:33,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370449550] [2022-07-13 11:10:33,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644870413] [2022-07-13 11:10:33,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644870413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:33,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:10:33,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 11:10:33,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372092660] [2022-07-13 11:10:33,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:33,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:10:33,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:10:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:10:33,468 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-13 11:10:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:33,593 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2022-07-13 11:10:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:10:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 22 [2022-07-13 11:10:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:33,596 INFO L225 Difference]: With dead ends: 86 [2022-07-13 11:10:33,596 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 11:10:33,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:10:33,597 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:10:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 11:10:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2022-07-13 11:10:33,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-13 11:10:33,601 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-07-13 11:10:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:33,602 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-13 11:10:33,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-13 11:10:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-13 11:10:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 11:10:33,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:33,603 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] [2022-07-13 11:10:33,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:33,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:33,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 3 times [2022-07-13 11:10:33,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352942921] [2022-07-13 11:10:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:33,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:33,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:33,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047417941] [2022-07-13 11:10:33,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:10:33,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:33,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:10:33,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:10:33,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:10:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:10:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:10:33,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:10:34,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:10:34,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352942921] [2022-07-13 11:10:34,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:10:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047417941] [2022-07-13 11:10:34,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047417941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:34,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:10:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 11:10:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441946778] [2022-07-13 11:10:34,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:34,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:10:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:10:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:10:34,034 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-13 11:10:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:34,229 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-07-13 11:10:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:10:34,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 22 [2022-07-13 11:10:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:34,230 INFO L225 Difference]: With dead ends: 71 [2022-07-13 11:10:34,230 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 11:10:34,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:10:34,231 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:34,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 61 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:10:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 11:10:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2022-07-13 11:10:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 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) [2022-07-13 11:10:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-07-13 11:10:34,234 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2022-07-13 11:10:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:34,234 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-07-13 11:10:34,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-13 11:10:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-07-13 11:10:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:10:34,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:34,235 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:34,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:34,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:34,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2022-07-13 11:10:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:34,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273278640] [2022-07-13 11:10:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:34,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 11:10:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226478167] [2022-07-13 11:10:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:34,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:34,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:10:34,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:10:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 11:10:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:34,918 INFO L356 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-07-13 11:10:34,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2022-07-13 11:10:34,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 11:10:34,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 11:10:34,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-07-13 11:10:34,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 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 180 treesize of output 641 [2022-07-13 11:10:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 644 [2022-07-13 11:10:35,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 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 180 treesize of output 641 [2022-07-13 11:10:35,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,520 INFO L356 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2022-07-13 11:10:35,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 193 treesize of output 658 [2022-07-13 11:10:35,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:35,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 650 [2022-07-13 11:10:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:35,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 650 [2022-07-13 11:10:36,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 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 188 treesize of output 647 [2022-07-13 11:10:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 647 [2022-07-13 11:10:36,212 WARN L220 Elim1Store]: Array PQE input equivalent to false [2022-07-13 11:10:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 647 [2022-07-13 11:10:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:36,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 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 188 treesize of output 647 [2022-07-13 11:10:36,800 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 5 treesize of output 3 [2022-07-13 11:10:36,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 11:10:36,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 73 [2022-07-13 11:10:37,158 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 11:10:37,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 3 [2022-07-13 11:10:53,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:53,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:53,671 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 70 treesize of output 33 [2022-07-13 11:10:53,674 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 5 treesize of output 3 [2022-07-13 11:10:53,677 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 5 treesize of output 3 [2022-07-13 11:10:55,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:55,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:55,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:55,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:55,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 89 treesize of output 82 [2022-07-13 11:10:55,923 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 5 treesize of output 3 [2022-07-13 11:10:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:56,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:56,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:56,583 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 74 treesize of output 33 [2022-07-13 11:10:56,587 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 5 treesize of output 3 [2022-07-13 11:10:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:56,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:56,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 96 treesize of output 85 [2022-07-13 11:10:56,624 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 5 treesize of output 3 [2022-07-13 11:10:56,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:56,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:56,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:56,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:56,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 111 treesize of output 96 [2022-07-13 11:10:56,649 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 5 treesize of output 3 [2022-07-13 11:10:56,653 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 5 treesize of output 3 [2022-07-13 11:10:57,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:57,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:57,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:57,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 89 treesize of output 82 [2022-07-13 11:10:57,374 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 5 treesize of output 3 [2022-07-13 11:10:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:58,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:58,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 111 treesize of output 96 [2022-07-13 11:10:58,853 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 5 treesize of output 3 [2022-07-13 11:10:58,856 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 5 treesize of output 3 [2022-07-13 11:10:58,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:58,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:58,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:58,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 125 treesize of output 112 [2022-07-13 11:10:58,885 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 5 treesize of output 3 [2022-07-13 11:10:58,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:58,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:58,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:58,938 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 82 treesize of output 41 [2022-07-13 11:10:58,942 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 5 treesize of output 3 [2022-07-13 11:10:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:59,299 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 86 treesize of output 49 [2022-07-13 11:10:59,302 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 5 treesize of output 3 [2022-07-13 11:10:59,305 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 5 treesize of output 3 [2022-07-13 11:10:59,308 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 5 treesize of output 3 [2022-07-13 11:11:00,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:00,985 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 100 treesize of output 33 [2022-07-13 11:11:00,988 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 5 treesize of output 3 [2022-07-13 11:11:02,491 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:11:02,492 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 23 treesize of output 19 [2022-07-13 11:11:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:02,671 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 98 treesize of output 85 [2022-07-13 11:11:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:11:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273278640] [2022-07-13 11:11:02,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 11:11:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226478167] [2022-07-13 11:11:02,674 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 11:11:02,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:02,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 11:11:02,894 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:164) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-13 11:11:02,898 INFO L158 Benchmark]: Toolchain (without parser) took 35819.18ms. Allocated memory was 119.5MB in the beginning and 377.5MB in the end (delta: 257.9MB). Free memory was 89.7MB in the beginning and 131.1MB in the end (delta: -41.3MB). Peak memory consumption was 216.0MB. Max. memory is 16.1GB. [2022-07-13 11:11:02,898 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 83.9MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:11:02,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.79ms. Allocated memory is still 119.5MB. Free memory was 89.4MB in the beginning and 95.7MB in the end (delta: -6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 11:11:02,898 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.27ms. Allocated memory is still 119.5MB. Free memory was 95.7MB in the beginning and 93.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 11:11:02,899 INFO L158 Benchmark]: Boogie Preprocessor took 16.96ms. Allocated memory is still 119.5MB. Free memory was 93.2MB in the beginning and 92.2MB in the end (delta: 997.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:11:02,899 INFO L158 Benchmark]: RCFGBuilder took 248.77ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 80.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 11:11:02,899 INFO L158 Benchmark]: TraceAbstraction took 35346.32ms. Allocated memory was 119.5MB in the beginning and 377.5MB in the end (delta: 257.9MB). Free memory was 79.6MB in the beginning and 131.1MB in the end (delta: -51.4MB). Peak memory consumption was 208.7MB. Max. memory is 16.1GB. [2022-07-13 11:11:02,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 83.9MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.79ms. Allocated memory is still 119.5MB. Free memory was 89.4MB in the beginning and 95.7MB in the end (delta: -6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.27ms. Allocated memory is still 119.5MB. Free memory was 95.7MB in the beginning and 93.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.96ms. Allocated memory is still 119.5MB. Free memory was 93.2MB in the beginning and 92.2MB in the end (delta: 997.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 248.77ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 80.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 35346.32ms. Allocated memory was 119.5MB in the beginning and 377.5MB in the end (delta: 257.9MB). Free memory was 79.6MB in the beginning and 131.1MB in the end (delta: -51.4MB). Peak memory consumption was 208.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-13 11:11:02,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/ncomp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c3d1ff002f6e6cf179cc6204a129c133a3beda704ea9fff27ad69a10f5c1f33d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:11:04,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:11:04,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:11:04,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:11:04,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:11:04,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:11:04,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:11:04,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:11:04,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:11:04,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:11:04,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:11:04,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:11:04,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:11:04,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:11:04,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:11:04,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:11:04,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:11:04,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:11:04,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:11:04,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:11:04,686 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:11:04,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:11:04,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:11:04,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:11:04,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:11:04,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:11:04,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:11:04,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:11:04,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:11:04,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:11:04,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:11:04,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:11:04,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:11:04,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:11:04,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:11:04,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:11:04,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:11:04,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:11:04,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:11:04,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:11:04,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:11:04,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:11:04,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 11:11:04,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:11:04,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:11:04,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:11:04,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:11:04,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:11:04,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:11:04,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:11:04,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:11:04,735 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:11:04,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:11:04,736 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:11:04,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:11:04,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:11:04,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:11:04,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:11:04,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:11:04,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 11:11:04,737 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 11:11:04,737 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 11:11:04,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:11:04,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:11:04,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:11:04,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:11:04,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:11:04,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:11:04,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:11:04,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:11:04,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:11:04,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:11:04,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:11:04,739 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 11:11:04,739 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 11:11:04,740 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:11:04,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:11:04,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:11:04,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 11:11:04,740 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3d1ff002f6e6cf179cc6204a129c133a3beda704ea9fff27ad69a10f5c1f33d [2022-07-13 11:11:05,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:11:05,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:11:05,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:11:05,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:11:05,032 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:11:05,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ncomp.c [2022-07-13 11:11:05,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea49500a0/c0d01576ffb646d4a54b370ddc72e839/FLAGce5925cfa [2022-07-13 11:11:05,400 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:11:05,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c [2022-07-13 11:11:05,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea49500a0/c0d01576ffb646d4a54b370ddc72e839/FLAGce5925cfa [2022-07-13 11:11:05,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea49500a0/c0d01576ffb646d4a54b370ddc72e839 [2022-07-13 11:11:05,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:11:05,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:11:05,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:11:05,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:11:05,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:11:05,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:11:05" (1/1) ... [2022-07-13 11:11:05,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f4d8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:05, skipping insertion in model container [2022-07-13 11:11:05,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:11:05" (1/1) ... [2022-07-13 11:11:05,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:11:05,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:11:05,926 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/ncomp.c[588,601] [2022-07-13 11:11:05,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:11:05,950 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:11:05,958 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/ncomp.c[588,601] [2022-07-13 11:11:05,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:11:06,011 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:11:06,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06 WrapperNode [2022-07-13 11:11:06,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:11:06,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:11:06,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:11:06,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:11:06,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,042 INFO L137 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2022-07-13 11:11:06,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:11:06,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:11:06,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:11:06,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:11:06,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:11:06,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:11:06,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:11:06,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:11:06,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (1/1) ... [2022-07-13 11:11:06,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:11:06,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:11:06,121 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) [2022-07-13 11:11:06,168 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 [2022-07-13 11:11:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:11:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 11:11:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-13 11:11:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:11:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:11:06,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:11:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-07-13 11:11:06,248 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:11:06,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:11:06,729 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:11:06,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:11:06,740 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 11:11:06,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:11:06 BoogieIcfgContainer [2022-07-13 11:11:06,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:11:06,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:11:06,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:11:06,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:11:06,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:11:05" (1/3) ... [2022-07-13 11:11:06,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcd8fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:11:06, skipping insertion in model container [2022-07-13 11:11:06,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:11:06" (2/3) ... [2022-07-13 11:11:06,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcd8fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:11:06, skipping insertion in model container [2022-07-13 11:11:06,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:11:06" (3/3) ... [2022-07-13 11:11:06,749 INFO L111 eAbstractionObserver]: Analyzing ICFG ncomp.c [2022-07-13 11:11:06,760 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:11:06,760 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:11:06,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:11:06,809 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@418371eb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49b1304 [2022-07-13 11:11:06,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:11:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2022-07-13 11:11:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:11:06,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:06,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:06,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-07-13 11:11:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:06,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273893281] [2022-07-13 11:11:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:06,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:06,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:06,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 11:11:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:06,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 11:11:06,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:06,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:06,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:06,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273893281] [2022-07-13 11:11:06,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273893281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:06,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:06,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:11:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179468948] [2022-07-13 11:11:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:11:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:11:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:11:07,019 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-07-13 11:11:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:07,034 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-07-13 11:11:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:11:07,037 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2022-07-13 11:11:07,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:07,042 INFO L225 Difference]: With dead ends: 44 [2022-07-13 11:11:07,043 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 11:11:07,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:11:07,049 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-07-13 11:11:07,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:11:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 11:11:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-13 11:11:07,078 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) [2022-07-13 11:11:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-13 11:11:07,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-07-13 11:11:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:07,081 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-13 11:11:07,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-07-13 11:11:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-13 11:11:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 11:11:07,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:07,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:07,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:07,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-07-13 11:11:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466084904] [2022-07-13 11:11:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:07,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:07,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:07,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 11:11:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 11:11:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:08,403 INFO L356 Elim1Store]: treesize reduction 171, result has 27.2 percent of original size [2022-07-13 11:11:08,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 256 [2022-07-13 11:11:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:08,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:08,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:11:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:08,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:11:08,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:08,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:11:09,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:09,521 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-13 11:11:09,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 42 [2022-07-13 11:11:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:09,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:11:09,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:09,630 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 61 treesize of output 22 [2022-07-13 11:11:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:09,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:11:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:09,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:09,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 39 [2022-07-13 11:11:11,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 29 treesize of output 17 [2022-07-13 11:11:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:11,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:11:11,579 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:11:11,579 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 1 case distinctions, treesize of input 57 treesize of output 33 [2022-07-13 11:11:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:11,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:11:11,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466084904] [2022-07-13 11:11:11,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466084904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:11:11,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:11:11,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:11:11,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492337602] [2022-07-13 11:11:11,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:11:11,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:11:11,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:11:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:11:11,605 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2022-07-13 11:11:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:12,510 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-07-13 11:11:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:11:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 14 [2022-07-13 11:11:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:12,512 INFO L225 Difference]: With dead ends: 43 [2022-07-13 11:11:12,512 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 11:11:12,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:11:12,513 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:12,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:11:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 11:11:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-13 11:11:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:11:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-13 11:11:12,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2022-07-13 11:11:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:12,516 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-13 11:11:12,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2022-07-13 11:11:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-13 11:11:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:11:12,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:12,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:12,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:12,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:12,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2022-07-13 11:11:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741091409] [2022-07-13 11:11:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:12,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:12,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:12,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 11:11:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:11:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:13,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:13,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741091409] [2022-07-13 11:11:13,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741091409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:13,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:13,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-07-13 11:11:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67035807] [2022-07-13 11:11:13,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:13,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:11:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:13,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:11:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:11:13,145 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:11:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:14,098 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-13 11:11:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:11:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 11:11:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:14,111 INFO L225 Difference]: With dead ends: 61 [2022-07-13 11:11:14,112 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 11:11:14,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2022-07-13 11:11:14,119 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 173 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:14,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 29 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:11:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 11:11:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2022-07-13 11:11:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 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) [2022-07-13 11:11:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-13 11:11:14,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2022-07-13 11:11:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:14,136 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-13 11:11:14,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:11:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-13 11:11:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:11:14,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:14,137 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] [2022-07-13 11:11:14,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-13 11:11:14,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:14,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-07-13 11:11:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:14,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434334658] [2022-07-13 11:11:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:14,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:14,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:14,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:14,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 11:11:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 11:11:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:14,923 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:11:14,924 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 25 treesize of output 21 [2022-07-13 11:11:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:14,953 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 26 treesize of output 28 [2022-07-13 11:11:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:14,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:11:15,031 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 27 treesize of output 27 [2022-07-13 11:11:15,218 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 27 treesize of output 27 [2022-07-13 11:11:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:15,375 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:11:15,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 45 [2022-07-13 11:11:15,499 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:11:15,500 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 1 case distinctions, treesize of input 57 treesize of output 33 [2022-07-13 11:11:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:19,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:19,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:19,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434334658] [2022-07-13 11:11:19,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434334658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:19,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:19,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-07-13 11:11:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227058366] [2022-07-13 11:11:19,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 11:11:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 11:11:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:11:19,869 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) [2022-07-13 11:11:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:23,401 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-13 11:11:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:11:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) Word has length 20 [2022-07-13 11:11:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:23,414 INFO L225 Difference]: With dead ends: 58 [2022-07-13 11:11:23,414 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 11:11:23,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:11:23,415 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:23,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 119 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 85 Unchecked, 2.3s Time] [2022-07-13 11:11:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 11:11:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-07-13 11:11:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) [2022-07-13 11:11:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-13 11:11:23,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 20 [2022-07-13 11:11:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:23,419 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-13 11:11:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) [2022-07-13 11:11:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-13 11:11:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 11:11:23,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:23,420 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] [2022-07-13 11:11:23,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-13 11:11:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:23,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:23,621 INFO L85 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 2 times [2022-07-13 11:11:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:23,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236143256] [2022-07-13 11:11:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:11:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:23,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:23,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 11:11:23,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:11:23,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:11:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 11:11:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:11:24,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:11:24,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236143256] [2022-07-13 11:11:24,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236143256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:24,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:24,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2022-07-13 11:11:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669965435] [2022-07-13 11:11:24,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:11:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:11:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:11:24,580 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 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) [2022-07-13 11:11:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:11:26,660 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2022-07-13 11:11:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 11:11:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 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 22 [2022-07-13 11:11:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:11:26,672 INFO L225 Difference]: With dead ends: 105 [2022-07-13 11:11:26,672 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 11:11:26,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 11:11:26,673 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 247 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:11:26,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 64 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 11:11:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 11:11:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2022-07-13 11:11:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 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) [2022-07-13 11:11:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-07-13 11:11:26,690 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 22 [2022-07-13 11:11:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:11:26,690 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-07-13 11:11:26,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 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) [2022-07-13 11:11:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-07-13 11:11:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:11:26,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:11:26,692 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:11:26,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:11:26,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:11:26,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:11:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:11:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2022-07-13 11:11:26,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:11:26,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526903827] [2022-07-13 11:11:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:11:26,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:11:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:11:26,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:11:26,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 11:11:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:11:27,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-13 11:11:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:11:28,051 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:11:28,052 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 39 treesize of output 35 [2022-07-13 11:11:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:28,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-07-13 11:11:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,163 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 11:11:28,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 46 [2022-07-13 11:11:28,376 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 11:11:28,377 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 2 case distinctions, treesize of input 42 treesize of output 42 [2022-07-13 11:11:28,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 11:11:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-07-13 11:11:28,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:28,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-07-13 11:11:31,888 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-13 11:11:31,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 123 treesize of output 63 [2022-07-13 11:11:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:55,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:55,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:11:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:11:55,679 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-13 11:11:55,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 856 treesize of output 1 [2022-07-13 11:11:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:11:55,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:11:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526903827] [2022-07-13 11:11:55,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526903827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:11:55,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:11:55,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-13 11:11:55,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673657624] [2022-07-13 11:11:55,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:11:55,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 11:11:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:11:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 11:11:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=625, Unknown=1, NotChecked=0, Total=756 [2022-07-13 11:11:55,684 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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) [2022-07-13 11:12:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:02,099 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-07-13 11:12:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:12:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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 24 [2022-07-13 11:12:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:02,109 INFO L225 Difference]: With dead ends: 62 [2022-07-13 11:12:02,109 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 11:12:02,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=230, Invalid=1029, Unknown=1, NotChecked=0, Total=1260 [2022-07-13 11:12:02,110 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:02,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 68 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 135 Invalid, 0 Unknown, 79 Unchecked, 3.9s Time] [2022-07-13 11:12:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 11:12:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-13 11:12:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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) [2022-07-13 11:12:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-13 11:12:02,118 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2022-07-13 11:12:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:02,118 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-13 11:12:02,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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) [2022-07-13 11:12:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-13 11:12:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:12:02,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:02,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:02,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:02,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:02,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 3 times [2022-07-13 11:12:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:02,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021762607] [2022-07-13 11:12:02,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:12:02,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:02,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:02,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:12:02,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 11:12:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:12:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:03,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 11:12:03,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:03,718 INFO L356 Elim1Store]: treesize reduction 171, result has 27.2 percent of original size [2022-07-13 11:12:03,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 308 [2022-07-13 11:12:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:03,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:12:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:03,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:12:03,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:03,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 11:12:04,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 95 [2022-07-13 11:12:04,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,320 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-13 11:12:04,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 93 [2022-07-13 11:12:04,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:04,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:12:04,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:04,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:04,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 87 treesize of output 80 [2022-07-13 11:12:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:04,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:12:04,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:04,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 101 treesize of output 90 [2022-07-13 11:12:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:04,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:12:06,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:06,279 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-13 11:12:06,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 30 [2022-07-13 11:12:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:06,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:12:07,943 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:12:07,944 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 25 treesize of output 21 [2022-07-13 11:12:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,118 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 45 treesize of output 44 [2022-07-13 11:12:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:12:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-07-13 11:12:08,335 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 27 treesize of output 27 [2022-07-13 11:12:08,560 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 27 treesize of output 27 [2022-07-13 11:12:08,610 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 27 treesize of output 27 [2022-07-13 11:12:08,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,785 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:08,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-07-13 11:12:08,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:08,943 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:08,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 45 [2022-07-13 11:12:09,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:12:09,153 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 1 case distinctions, treesize of input 57 treesize of output 33 [2022-07-13 11:12:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:12:09,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:12:16,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:16,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:12:16,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:12:16,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021762607] [2022-07-13 11:12:16,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021762607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:16,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:12:16,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-07-13 11:12:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120247773] [2022-07-13 11:12:16,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 11:12:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:12:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 11:12:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=639, Unknown=6, NotChecked=0, Total=812 [2022-07-13 11:12:16,753 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-07-13 11:12:18,570 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ sign_extend 32) c_~N~0))) (and (or (forall ((v_ArrVal_329 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_329) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) c_~N~0))) (not (bvslt (_ bv2 64) .cse1))) (or (forall ((v_ArrVal_334 (_ BitVec 32)) (v_ArrVal_333 (_ BitVec 32)) (v_ArrVal_332 (_ BitVec 32)) (v_ArrVal_331 (_ BitVec 32))) (= (let ((.cse2 (let ((.cse4 (bvmul (_ bv8 32) ((_ extract 31 0) (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 64)))))) (store (store (let ((.cse3 (bvmul (_ bv8 32) ((_ extract 31 0) |c_ULTIMATE.start_main_~i~0#1|)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| .cse3) v_ArrVal_332) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset| .cse3) v_ArrVal_331)) (bvadd |c_ULTIMATE.start_main_~c~0#1.offset| .cse4) v_ArrVal_334) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset| .cse4) v_ArrVal_333)))) (concat (select .cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) c_~N~0))) (not (bvslt (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 64)) .cse1)) (not (bvslt |c_ULTIMATE.start_main_~i~0#1| .cse1))))) is different from false [2022-07-13 11:12:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:12:27,257 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-13 11:12:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 11:12:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) Word has length 26 [2022-07-13 11:12:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:12:27,275 INFO L225 Difference]: With dead ends: 100 [2022-07-13 11:12:27,275 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 11:12:27,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=318, Invalid=1485, Unknown=7, NotChecked=82, Total=1892 [2022-07-13 11:12:27,276 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:12:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 120 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 165 Invalid, 0 Unknown, 228 Unchecked, 2.6s Time] [2022-07-13 11:12:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 11:12:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-07-13 11:12:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-07-13 11:12:27,284 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 26 [2022-07-13 11:12:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:12:27,284 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-07-13 11:12:27,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2022-07-13 11:12:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-07-13 11:12:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 11:12:27,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:12:27,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:12:27,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:12:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:12:27,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:12:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:12:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2022-07-13 11:12:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:12:27,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842261436] [2022-07-13 11:12:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:12:27,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:12:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:12:27,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:12:27,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 11:12:28,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:12:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:12:28,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 11:12:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:12:28,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:28,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:28,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:28,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:28,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:28,690 INFO L356 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-07-13 11:12:28,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 43 [2022-07-13 11:12:28,764 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-13 11:12:28,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 60 [2022-07-13 11:12:28,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:28,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-07-13 11:12:28,921 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:12:28,921 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 25 treesize of output 21 [2022-07-13 11:12:29,108 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 11:12:29,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-07-13 11:12:29,272 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 23 [2022-07-13 11:12:29,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2022-07-13 11:12:29,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-07-13 11:12:29,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:12:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:29,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 101 [2022-07-13 11:12:30,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:12:30,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 93 [2022-07-13 11:12:34,397 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-13 11:12:34,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 63 [2022-07-13 11:12:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:34,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:13:24,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:24,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:24,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:24,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:24,256 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-13 11:13:24,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 892 treesize of output 1 [2022-07-13 11:13:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:13:24,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:13:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842261436] [2022-07-13 11:13:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842261436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:13:24,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:13:24,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-07-13 11:13:24,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704459958] [2022-07-13 11:13:24,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:13:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 11:13:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:13:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 11:13:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1186, Unknown=7, NotChecked=0, Total=1406 [2022-07-13 11:13:24,266 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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) [2022-07-13 11:13:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:13:31,972 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-07-13 11:13:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 11:13:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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 30 [2022-07-13 11:13:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:13:31,993 INFO L225 Difference]: With dead ends: 98 [2022-07-13 11:13:31,993 INFO L226 Difference]: Without dead ends: 96 [2022-07-13 11:13:31,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=378, Invalid=2065, Unknown=7, NotChecked=0, Total=2450 [2022-07-13 11:13:31,994 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:13:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 151 Unchecked, 2.7s Time] [2022-07-13 11:13:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-13 11:13:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2022-07-13 11:13:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 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) [2022-07-13 11:13:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-07-13 11:13:32,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 30 [2022-07-13 11:13:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:13:32,003 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-07-13 11:13:32,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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) [2022-07-13 11:13:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-07-13 11:13:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 11:13:32,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:13:32,004 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:13:32,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:13:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:13:32,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:13:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:13:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash 309331156, now seen corresponding path program 4 times [2022-07-13 11:13:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:13:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517066406] [2022-07-13 11:13:32,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:13:32,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:13:32,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:13:32,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:13:32,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 11:13:32,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:13:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:13:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 11:13:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:13:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:13:32,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:13:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:13:33,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:13:33,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517066406] [2022-07-13 11:13:33,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517066406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:13:33,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:13:33,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-07-13 11:13:33,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922791271] [2022-07-13 11:13:33,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:13:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 11:13:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:13:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 11:13:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:13:33,820 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 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) [2022-07-13 11:13:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:13:40,725 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2022-07-13 11:13:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 11:13:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 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 30 [2022-07-13 11:13:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:13:40,740 INFO L225 Difference]: With dead ends: 206 [2022-07-13 11:13:40,740 INFO L226 Difference]: Without dead ends: 171 [2022-07-13 11:13:40,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2022-07-13 11:13:40,741 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 404 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:13:40,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 147 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-13 11:13:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-13 11:13:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 82. [2022-07-13 11:13:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 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) [2022-07-13 11:13:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-07-13 11:13:40,757 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 30 [2022-07-13 11:13:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:13:40,757 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-07-13 11:13:40,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 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) [2022-07-13 11:13:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-07-13 11:13:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 11:13:40,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:13:40,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:13:40,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:13:40,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:13:40,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:13:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:13:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 5 times [2022-07-13 11:13:40,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:13:40,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55710664] [2022-07-13 11:13:40,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:13:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:13:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:13:40,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:13:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 11:13:42,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 11:13:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:13:42,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-13 11:13:42,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:13:42,584 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:13:42,584 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 25 treesize of output 21 [2022-07-13 11:13:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:42,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:42,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 53 [2022-07-13 11:13:42,815 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 11:13:42,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 56 [2022-07-13 11:13:43,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-07-13 11:13:43,341 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:13:43,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 42 [2022-07-13 11:13:43,726 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 11:13:43,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2022-07-13 11:13:43,918 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 27 treesize of output 27 [2022-07-13 11:13:44,035 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 27 treesize of output 27 [2022-07-13 11:13:44,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,245 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:13:44,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-07-13 11:13:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,376 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:13:44,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-07-13 11:13:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:44,515 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:13:44,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 45 [2022-07-13 11:13:44,679 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 11:13:44,679 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 1 case distinctions, treesize of input 57 treesize of output 33 [2022-07-13 11:13:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:13:44,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:13:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:55,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:55,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:55,317 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-07-13 11:13:55,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 1 [2022-07-13 11:13:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:13:55,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:13:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55710664] [2022-07-13 11:13:55,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55710664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:13:55,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:13:55,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2022-07-13 11:13:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100647063] [2022-07-13 11:13:55,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:13:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 11:13:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:13:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 11:13:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1152, Unknown=2, NotChecked=0, Total=1482 [2022-07-13 11:13:55,321 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2022-07-13 11:13:57,960 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ sign_extend 32) c_~N~0))) (and (let ((.cse0 (bvule c_~N~0 (_ bv536870911 32)))) (or (and .cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and (not .cse0) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))))) (or (forall ((v_ArrVal_565 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_565) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) c_~N~0))) (not (bvslt (bvadd (_ bv2 64) |c_ULTIMATE.start_main_~i~0#1|) .cse2))) (not (bvsle c_~N~0 (_ bv0 32))) (= .cse2 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse3 |c_ULTIMATE.start_main_~c~0#1.offset|)))))) is different from false [2022-07-13 11:13:59,676 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_565 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_565) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) c_~N~0)))) (.cse1 ((_ sign_extend 32) c_~N~0))) (and (or .cse0 (not (bvslt (bvadd (_ bv2 64) |c_ULTIMATE.start_main_~i~0#1|) .cse1))) (or .cse0 (not (bvslt (_ bv3 64) .cse1))))) is different from false [2022-07-13 11:13:59,863 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_565 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_565) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse3 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) c_~N~0)))) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|)) (.cse1 ((_ sign_extend 32) c_~N~0))) (and (or .cse0 (not (bvslt (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 64)) .cse1))) (= |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv0 32)) (or .cse0 (not (bvslt (bvadd (_ bv2 64) |c_ULTIMATE.start_main_~i~0#1|) .cse1))) (bvslt (_ bv3 64) .cse1) (not (bvslt (_ bv4 64) .cse1)) (= ((_ extract 63 32) .cse1) (select .cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|))) (= (select .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) ((_ extract 31 0) .cse1)))) is different from false [2022-07-13 11:14:00,061 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|)) (.cse0 (forall ((v_ArrVal_565 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_565) |c_ULTIMATE.start_main_~c~0#1.base|))) (concat (select .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|)) (select .cse3 |c_ULTIMATE.start_main_~c~0#1.offset|))) ((_ sign_extend 32) c_~N~0)))) (.cse1 ((_ sign_extend 32) c_~N~0))) (and (or .cse0 (not (bvslt (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 64)) .cse1))) (= |c_ULTIMATE.start_main_~c~0#1.offset| (_ bv0 32)) (bvslt (_ bv3 64) .cse1) (not (bvslt (_ bv4 64) .cse1)) (= ((_ extract 63 32) .cse1) (select .cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~c~0#1.offset|))) (= (select .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) ((_ extract 31 0) .cse1)) (or .cse0 (not (bvslt |c_ULTIMATE.start_main_~i~0#1| .cse1))))) is different from false [2022-07-13 11:14:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:14:17,039 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2022-07-13 11:14:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 11:14:17,054 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 [2022-07-13 11:14:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:14:17,054 INFO L225 Difference]: With dead ends: 162 [2022-07-13 11:14:17,054 INFO L226 Difference]: Without dead ends: 160 [2022-07-13 11:14:17,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=762, Invalid=3133, Unknown=27, NotChecked=500, Total=4422 [2022-07-13 11:14:17,056 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:14:17,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 263 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 214 Invalid, 0 Unknown, 215 Unchecked, 4.0s Time] [2022-07-13 11:14:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-13 11:14:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 123. [2022-07-13 11:14:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.139344262295082) internal successors, (139), 122 states have internal predecessors, (139), 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) [2022-07-13 11:14:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-07-13 11:14:17,071 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 32 [2022-07-13 11:14:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:14:17,071 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-07-13 11:14:17,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2022-07-13 11:14:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-07-13 11:14:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 11:14:17,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:14:17,072 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:14:17,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:14:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:14:17,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:14:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:14:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 505093188, now seen corresponding path program 3 times [2022-07-13 11:14:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:14:17,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064991708] [2022-07-13 11:14:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:14:17,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:14:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:14:17,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:14:17,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 11:14:18,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:14:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:14:18,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-13 11:14:18,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:14:18,870 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:14:18,871 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 25 treesize of output 21 [2022-07-13 11:14:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:18,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:18,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-13 11:14:18,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 44 [2022-07-13 11:14:19,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,123 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:19,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 70 [2022-07-13 11:14:19,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,404 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:19,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 70 [2022-07-13 11:14:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:19,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:19,996 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:19,996 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 4 new quantified variables, introduced 16 case distinctions, treesize of input 156 treesize of output 107 [2022-07-13 11:14:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:14:20,338 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:20,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 99 [2022-07-13 11:14:20,678 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 11:14:20,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 150 [2022-07-13 11:14:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:21,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:21,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:14:21,052 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-13 11:14:21,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 153 treesize of output 125 [2022-07-13 11:14:26,123 INFO L356 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2022-07-13 11:14:26,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 213 treesize of output 109 [2022-07-13 11:14:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:14:26,243 INFO L328 TraceCheckSpWp]: Computing backward predicates...