./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr3.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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:34:28,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:34:28,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:34:28,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:34:28,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:34:28,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:34:28,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:34:28,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:34:28,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:34:28,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:34:28,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:34:28,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:34:28,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:34:28,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:34:28,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:34:28,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:34:28,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:34:28,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:34:28,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:34:28,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:34:28,842 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:34:28,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:34:28,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:34:28,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:34:28,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:34:28,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:34:28,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:34:28,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:34:28,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:34:28,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:34:28,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:34:28,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:34:28,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:34:28,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:34:28,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:34:28,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:34:28,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:34:28,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:34:28,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:34:28,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:34:28,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:34:28,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:34:28,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:34:28,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:34:28,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:34:28,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:34:28,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:34:28,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:34:28,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:34:28,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:34:28,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:34:28,886 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:34:28,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:34:28,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:34:28,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:34:28,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:34:28,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:34:28,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:34:28,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:34:28,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:34:28,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:34:28,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:34:28,889 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:34:28,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:34:28,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:34:28,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:34:28,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:34:28,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:34:28,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:34:28,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:34:28,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:34:28,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:34:28,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:34:28,891 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:34:28,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:34:28,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:34:28,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2022-07-19 09:34:29,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:34:29,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:34:29,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:34:29,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:34:29,115 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:34:29,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2022-07-19 09:34:29,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a9a0a7c/378baa7a8ed24751b6197c9406c34e67/FLAG2a8db4db4 [2022-07-19 09:34:29,471 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:34:29,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2022-07-19 09:34:29,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a9a0a7c/378baa7a8ed24751b6197c9406c34e67/FLAG2a8db4db4 [2022-07-19 09:34:29,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a9a0a7c/378baa7a8ed24751b6197c9406c34e67 [2022-07-19 09:34:29,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:34:29,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:34:29,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:34:29,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:34:29,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:34:29,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686aac42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29, skipping insertion in model container [2022-07-19 09:34:29,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:34:29,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:34:30,091 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-tiling/pnr3.c[395,408] [2022-07-19 09:34:30,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:34:30,147 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:34:30,158 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-tiling/pnr3.c[395,408] [2022-07-19 09:34:30,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:34:30,209 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:34:30,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30 WrapperNode [2022-07-19 09:34:30,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:34:30,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:34:30,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:34:30,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:34:30,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,268 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-07-19 09:34:30,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:34:30,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:34:30,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:34:30,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:34:30,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:34:30,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:34:30,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:34:30,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:34:30,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (1/1) ... [2022-07-19 09:34:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:34:30,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:30,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:34:30,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:34:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:34:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:34:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:34:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:34:30,389 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-19 09:34:30,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-19 09:34:30,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:34:30,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:34:30,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:34:30,438 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:34:30,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:34:30,546 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:34:30,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:34:30,551 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:34:30,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:34:30 BoogieIcfgContainer [2022-07-19 09:34:30,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:34:30,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:34:30,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:34:30,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:34:30,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:34:29" (1/3) ... [2022-07-19 09:34:30,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbe8553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:34:30, skipping insertion in model container [2022-07-19 09:34:30,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:30" (2/3) ... [2022-07-19 09:34:30,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbe8553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:34:30, skipping insertion in model container [2022-07-19 09:34:30,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:34:30" (3/3) ... [2022-07-19 09:34:30,558 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-07-19 09:34:30,566 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:34:30,567 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:34:30,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:34:30,600 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@1e576390, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65818937 [2022-07-19 09:34:30,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:34:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:34:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:34:30,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:30,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:30,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2022-07-19 09:34:30,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570708790] [2022-07-19 09:34:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:34:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570708790] [2022-07-19 09:34:30,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570708790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:34:30,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:34:30,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:34:30,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576029436] [2022-07-19 09:34:30,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:34:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:34:30,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:34:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:34:30,829 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:30,846 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-07-19 09:34:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:34:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 09:34:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:30,852 INFO L225 Difference]: With dead ends: 57 [2022-07-19 09:34:30,853 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 09:34:30,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:34:30,864 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:30,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:34:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 09:34:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 09:34:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:34:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-19 09:34:30,901 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2022-07-19 09:34:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:30,901 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-19 09:34:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-19 09:34:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:34:30,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:30,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:30,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:34:30,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2022-07-19 09:34:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:30,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888274710] [2022-07-19 09:34:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:34:31,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888274710] [2022-07-19 09:34:31,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888274710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:34:31,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:34:31,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:34:31,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099946798] [2022-07-19 09:34:31,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:34:31,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:34:31,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:34:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:34:31,129 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:31,210 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-19 09:34:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:34:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 09:34:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:31,211 INFO L225 Difference]: With dead ends: 45 [2022-07-19 09:34:31,211 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 09:34:31,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:34:31,213 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:31,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:34:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 09:34:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-19 09:34:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:34:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-19 09:34:31,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-07-19 09:34:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:31,221 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-19 09:34:31,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:34:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-19 09:34:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 09:34:31,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:31,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:31,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:34:31,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2022-07-19 09:34:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:31,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37832258] [2022-07-19 09:34:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37832258] [2022-07-19 09:34:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37832258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840375406] [2022-07-19 09:34:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:31,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:34:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 09:34:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:31,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:31,620 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 30 treesize of output 29 [2022-07-19 09:34:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:31,645 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 22 treesize of output 21 [2022-07-19 09:34:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:31,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:31,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-19 09:34:31,757 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 24 treesize of output 22 [2022-07-19 09:34:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:31,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840375406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:31,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:31,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-19 09:34:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038053381] [2022-07-19 09:34:31,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:31,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:34:31,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:34:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:34:31,774 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 09:34:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:31,965 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-07-19 09:34:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:34:31,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-07-19 09:34:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:31,967 INFO L225 Difference]: With dead ends: 84 [2022-07-19 09:34:31,967 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 09:34:31,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:34:31,969 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:31,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:34:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 09:34:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2022-07-19 09:34:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 09:34:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-19 09:34:31,977 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2022-07-19 09:34:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:31,977 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-19 09:34:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 09:34:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-19 09:34:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 09:34:31,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:31,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:32,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:32,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:32,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2022-07-19 09:34:32,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:32,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188095742] [2022-07-19 09:34:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:32,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:32,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188095742] [2022-07-19 09:34:32,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188095742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402771598] [2022-07-19 09:34:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:32,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:32,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:32,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:34:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:34:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:32,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:32,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:32,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:34:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:32,541 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 [2022-07-19 09:34:32,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:32,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:33,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-19 09:34:33,057 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 28 treesize of output 26 [2022-07-19 09:34:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:33,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402771598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:33,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-19 09:34:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436379826] [2022-07-19 09:34:33,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:34:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:34:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:34:33,109 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-19 09:34:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:33,595 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2022-07-19 09:34:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 09:34:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2022-07-19 09:34:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:33,603 INFO L225 Difference]: With dead ends: 137 [2022-07-19 09:34:33,604 INFO L226 Difference]: Without dead ends: 135 [2022-07-19 09:34:33,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:34:33,608 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 194 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:33,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 409 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-07-19 09:34:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-19 09:34:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2022-07-19 09:34:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 09:34:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-07-19 09:34:33,632 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2022-07-19 09:34:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:33,632 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-07-19 09:34:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-19 09:34:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-07-19 09:34:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 09:34:33,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:33,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:33,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:33,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 09:34:33,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2022-07-19 09:34:33,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:33,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762231681] [2022-07-19 09:34:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:33,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762231681] [2022-07-19 09:34:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762231681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006877337] [2022-07-19 09:34:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:33,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:33,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:34:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 09:34:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:34,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:34,069 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 42 treesize of output 41 [2022-07-19 09:34:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:34,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:34,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:34,186 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 30 treesize of output 26 [2022-07-19 09:34:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:34,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006877337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:34,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:34,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-19 09:34:34,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951116170] [2022-07-19 09:34:34,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:34,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:34:34,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:34:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:34:34,205 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 09:34:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:34,441 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2022-07-19 09:34:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:34:34,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-07-19 09:34:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:34,443 INFO L225 Difference]: With dead ends: 202 [2022-07-19 09:34:34,443 INFO L226 Difference]: Without dead ends: 200 [2022-07-19 09:34:34,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:34:34,444 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:34,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:34:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-19 09:34:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2022-07-19 09:34:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 09:34:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2022-07-19 09:34:34,479 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2022-07-19 09:34:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:34,480 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2022-07-19 09:34:34,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 09:34:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2022-07-19 09:34:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 09:34:34,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:34,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:34,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 09:34:34,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:34,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:34,700 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2022-07-19 09:34:34,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:34,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178255539] [2022-07-19 09:34:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:34,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:34,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:34,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:34,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178255539] [2022-07-19 09:34:34,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178255539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710301494] [2022-07-19 09:34:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:34,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:34,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:34,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:34,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:34:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:34:34,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:35,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:35,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:35,099 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 23 treesize of output 22 [2022-07-19 09:34:35,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:35,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:35,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:35,267 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 34 treesize of output 30 [2022-07-19 09:34:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:35,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710301494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:35,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:35,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-19 09:34:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702665522] [2022-07-19 09:34:35,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:35,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:34:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:34:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:34:35,321 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-19 09:34:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:35,987 INFO L93 Difference]: Finished difference Result 318 states and 449 transitions. [2022-07-19 09:34:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 09:34:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2022-07-19 09:34:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:35,989 INFO L225 Difference]: With dead ends: 318 [2022-07-19 09:34:35,989 INFO L226 Difference]: Without dead ends: 316 [2022-07-19 09:34:35,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 09:34:35,990 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:35,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 450 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 482 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-07-19 09:34:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-19 09:34:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2022-07-19 09:34:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-19 09:34:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2022-07-19 09:34:36,009 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2022-07-19 09:34:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:36,009 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2022-07-19 09:34:36,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-19 09:34:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2022-07-19 09:34:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:34:36,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:36,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:36,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:36,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:36,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2022-07-19 09:34:36,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:36,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547488559] [2022-07-19 09:34:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:36,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:36,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:36,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547488559] [2022-07-19 09:34:36,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547488559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:36,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428249001] [2022-07-19 09:34:36,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:36,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:36,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:34:36,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 09:34:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:36,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:36,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:36,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:36,467 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 30 treesize of output 26 [2022-07-19 09:34:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:36,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428249001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:36,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:36,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-19 09:34:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080541428] [2022-07-19 09:34:36,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:36,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:34:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:34:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:34:36,493 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:34:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:36,930 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2022-07-19 09:34:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:34:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-19 09:34:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:36,933 INFO L225 Difference]: With dead ends: 629 [2022-07-19 09:34:36,934 INFO L226 Difference]: Without dead ends: 627 [2022-07-19 09:34:36,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:34:36,935 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:36,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 314 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:34:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-19 09:34:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2022-07-19 09:34:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-07-19 09:34:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2022-07-19 09:34:36,969 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2022-07-19 09:34:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:36,969 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2022-07-19 09:34:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:34:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2022-07-19 09:34:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:34:36,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:36,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:37,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:37,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2022-07-19 09:34:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:37,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917811023] [2022-07-19 09:34:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:37,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917811023] [2022-07-19 09:34:37,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917811023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425908378] [2022-07-19 09:34:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:37,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:37,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:37,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:34:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 09:34:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:37,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:37,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:34:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:37,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:37,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:37,590 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 34 treesize of output 30 [2022-07-19 09:34:37,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425908378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:37,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:37,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-07-19 09:34:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119702680] [2022-07-19 09:34:37,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:37,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:34:37,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:34:37,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-19 09:34:37,622 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:34:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:38,442 INFO L93 Difference]: Finished difference Result 699 states and 1051 transitions. [2022-07-19 09:34:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:34:38,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-19 09:34:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:38,445 INFO L225 Difference]: With dead ends: 699 [2022-07-19 09:34:38,446 INFO L226 Difference]: Without dead ends: 697 [2022-07-19 09:34:38,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1913, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 09:34:38,447 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:38,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 327 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:34:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-19 09:34:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 160. [2022-07-19 09:34:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-19 09:34:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2022-07-19 09:34:38,473 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2022-07-19 09:34:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:38,473 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2022-07-19 09:34:38,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:34:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2022-07-19 09:34:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 09:34:38,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:38,475 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:38,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:38,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:38,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2022-07-19 09:34:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:38,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807614745] [2022-07-19 09:34:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:38,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807614745] [2022-07-19 09:34:38,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807614745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954636248] [2022-07-19 09:34:38,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:34:38,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:38,869 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) [2022-07-19 09:34:38,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:34:38,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:34:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:34:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:39,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:39,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954636248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:39,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:39,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-07-19 09:34:39,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840779025] [2022-07-19 09:34:39,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:39,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 09:34:39,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 09:34:39,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2022-07-19 09:34:39,306 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 09:34:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:39,564 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2022-07-19 09:34:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:34:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2022-07-19 09:34:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:39,566 INFO L225 Difference]: With dead ends: 267 [2022-07-19 09:34:39,566 INFO L226 Difference]: Without dead ends: 247 [2022-07-19 09:34:39,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2022-07-19 09:34:39,567 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 272 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:39,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 144 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:34:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-19 09:34:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2022-07-19 09:34:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-19 09:34:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2022-07-19 09:34:39,587 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2022-07-19 09:34:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:39,588 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2022-07-19 09:34:39,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 09:34:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2022-07-19 09:34:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:34:39,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:39,589 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:39,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:39,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2022-07-19 09:34:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692892446] [2022-07-19 09:34:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692892446] [2022-07-19 09:34:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692892446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535347133] [2022-07-19 09:34:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:39,965 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) [2022-07-19 09:34:39,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:34:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:34:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:40,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:40,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:34:40,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:40,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:34:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:40,316 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 24 treesize of output 23 [2022-07-19 09:34:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:40,362 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 24 treesize of output 23 [2022-07-19 09:34:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:40,404 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 24 treesize of output 23 [2022-07-19 09:34:40,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:34:40,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535347133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:41,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:41,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-19 09:34:41,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477852079] [2022-07-19 09:34:41,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:41,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:34:41,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:34:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-19 09:34:41,323 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-19 09:34:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:41,919 INFO L93 Difference]: Finished difference Result 242 states and 338 transitions. [2022-07-19 09:34:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:34:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2022-07-19 09:34:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:41,921 INFO L225 Difference]: With dead ends: 242 [2022-07-19 09:34:41,921 INFO L226 Difference]: Without dead ends: 240 [2022-07-19 09:34:41,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=1168, Unknown=1, NotChecked=0, Total=1406 [2022-07-19 09:34:41,922 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:41,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 315 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 399 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-19 09:34:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-19 09:34:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2022-07-19 09:34:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-19 09:34:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2022-07-19 09:34:41,955 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 51 [2022-07-19 09:34:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:41,955 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2022-07-19 09:34:41,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-19 09:34:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2022-07-19 09:34:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 09:34:41,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:41,956 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:41,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:42,172 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,SelfDestructingSolverStorable9 [2022-07-19 09:34:42,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:42,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2022-07-19 09:34:42,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:42,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103776102] [2022-07-19 09:34:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:42,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:42,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103776102] [2022-07-19 09:34:42,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103776102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:42,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946846986] [2022-07-19 09:34:42,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:42,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:42,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:34:42,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:42,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:34:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:42,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:42,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:34:42,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:42,576 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 26 treesize of output 25 [2022-07-19 09:34:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:42,641 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 26 treesize of output 25 [2022-07-19 09:34:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:42,698 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 26 treesize of output 25 [2022-07-19 09:34:42,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 09:34:42,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:43,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946846986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:43,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:43,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-19 09:34:43,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102819340] [2022-07-19 09:34:43,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:43,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:34:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:34:43,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2022-07-19 09:34:43,276 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-19 09:34:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:43,914 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2022-07-19 09:34:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 09:34:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2022-07-19 09:34:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:43,915 INFO L225 Difference]: With dead ends: 204 [2022-07-19 09:34:43,915 INFO L226 Difference]: Without dead ends: 202 [2022-07-19 09:34:43,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1435, Unknown=1, NotChecked=0, Total=1722 [2022-07-19 09:34:43,916 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:43,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 333 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 434 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-07-19 09:34:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-19 09:34:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 78. [2022-07-19 09:34:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 09:34:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-07-19 09:34:43,930 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 55 [2022-07-19 09:34:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:43,931 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-07-19 09:34:43,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-19 09:34:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-07-19 09:34:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 09:34:43,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:43,932 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:43,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:44,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:44,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2022-07-19 09:34:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:44,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651455191] [2022-07-19 09:34:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651455191] [2022-07-19 09:34:44,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651455191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695152238] [2022-07-19 09:34:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:34:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:44,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:44,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:34:44,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:34:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:34:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:44,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:44,432 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:44,433 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:34:44,448 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:34:44,448 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 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:34:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:44,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:44,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:44,628 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 30 treesize of output 26 [2022-07-19 09:34:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:44,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695152238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:44,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:44,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-19 09:34:44,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922887663] [2022-07-19 09:34:44,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:34:44,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:34:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:34:44,660 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-19 09:34:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:46,329 INFO L93 Difference]: Finished difference Result 688 states and 1044 transitions. [2022-07-19 09:34:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 09:34:46,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2022-07-19 09:34:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:46,334 INFO L225 Difference]: With dead ends: 688 [2022-07-19 09:34:46,334 INFO L226 Difference]: Without dead ends: 686 [2022-07-19 09:34:46,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 09:34:46,336 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 273 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:46,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 866 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 09:34:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-19 09:34:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 133. [2022-07-19 09:34:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 103 states have internal predecessors, (134), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-19 09:34:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2022-07-19 09:34:46,377 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 63 [2022-07-19 09:34:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:46,378 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2022-07-19 09:34:46,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-19 09:34:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2022-07-19 09:34:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 09:34:46,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:46,379 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:46,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:46,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 09:34:46,594 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2022-07-19 09:34:46,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:46,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94055626] [2022-07-19 09:34:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:46,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:46,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94055626] [2022-07-19 09:34:46,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94055626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548648047] [2022-07-19 09:34:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:46,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:46,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:46,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:34:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:34:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:46,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:47,032 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:47,032 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 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:34:47,097 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:34:47,097 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:34:47,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:34:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 09:34:47,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:47,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:47,841 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 34 treesize of output 30 [2022-07-19 09:34:47,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548648047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:47,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:47,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-07-19 09:34:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055960717] [2022-07-19 09:34:47,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:47,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:34:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:34:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-07-19 09:34:47,883 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 09:34:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:49,137 INFO L93 Difference]: Finished difference Result 327 states and 444 transitions. [2022-07-19 09:34:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 09:34:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 63 [2022-07-19 09:34:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:49,140 INFO L225 Difference]: With dead ends: 327 [2022-07-19 09:34:49,140 INFO L226 Difference]: Without dead ends: 325 [2022-07-19 09:34:49,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=459, Invalid=3447, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 09:34:49,144 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 235 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:49,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 663 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 956 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-07-19 09:34:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-19 09:34:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 161. [2022-07-19 09:34:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 123 states have internal predecessors, (162), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-19 09:34:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-19 09:34:49,197 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 63 [2022-07-19 09:34:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:49,198 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-19 09:34:49,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 09:34:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-19 09:34:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 09:34:49,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:49,199 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:49,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:49,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 09:34:49,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2022-07-19 09:34:49,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:49,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207169600] [2022-07-19 09:34:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:49,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207169600] [2022-07-19 09:34:49,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207169600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:49,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831465253] [2022-07-19 09:34:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:34:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:49,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:49,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:49,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:34:49,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 09:34:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:34:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:49,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:49,728 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:49,728 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:34:49,847 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:34:49,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-19 09:34:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:49,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:49,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:49,913 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 30 treesize of output 26 [2022-07-19 09:34:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:49,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831465253] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:49,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:49,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-19 09:34:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433206611] [2022-07-19 09:34:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:34:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:34:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:34:49,947 INFO L87 Difference]: Start difference. First operand 161 states and 226 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 09:34:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:52,079 INFO L93 Difference]: Finished difference Result 1723 states and 2679 transitions. [2022-07-19 09:34:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-19 09:34:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2022-07-19 09:34:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:52,085 INFO L225 Difference]: With dead ends: 1723 [2022-07-19 09:34:52,086 INFO L226 Difference]: Without dead ends: 1721 [2022-07-19 09:34:52,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2022-07-19 09:34:52,088 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 173 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:52,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1048 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 09:34:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-19 09:34:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 347. [2022-07-19 09:34:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 263 states have internal predecessors, (363), 78 states have call successors, (78), 6 states have call predecessors, (78), 6 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-19 09:34:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-19 09:34:52,203 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 67 [2022-07-19 09:34:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:52,203 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-19 09:34:52,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 09:34:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-19 09:34:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 09:34:52,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:52,205 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:52,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 09:34:52,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 09:34:52,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:52,420 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2022-07-19 09:34:52,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:52,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024446491] [2022-07-19 09:34:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:52,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:52,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024446491] [2022-07-19 09:34:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024446491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:52,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787366085] [2022-07-19 09:34:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:52,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:52,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:52,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:34:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:52,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:34:52,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:52,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:52,759 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:34:52,759 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:34:52,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:34:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:34:52,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:53,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:53,050 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 34 treesize of output 30 [2022-07-19 09:34:53,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787366085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:53,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:53,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-19 09:34:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696682051] [2022-07-19 09:34:53,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:53,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:34:53,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:34:53,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:34:53,083 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 09:34:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:55,337 INFO L93 Difference]: Finished difference Result 1529 states and 2319 transitions. [2022-07-19 09:34:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-19 09:34:55,337 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2022-07-19 09:34:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:55,342 INFO L225 Difference]: With dead ends: 1529 [2022-07-19 09:34:55,342 INFO L226 Difference]: Without dead ends: 1527 [2022-07-19 09:34:55,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=778, Invalid=6704, Unknown=0, NotChecked=0, Total=7482 [2022-07-19 09:34:55,344 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 397 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:55,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 931 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1663 Invalid, 0 Unknown, 127 Unchecked, 0.9s Time] [2022-07-19 09:34:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-07-19 09:34:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 425. [2022-07-19 09:34:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 318 states have (on average 1.3930817610062893) internal successors, (443), 319 states have internal predecessors, (443), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-19 09:34:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 635 transitions. [2022-07-19 09:34:55,465 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 635 transitions. Word has length 67 [2022-07-19 09:34:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:55,465 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 635 transitions. [2022-07-19 09:34:55,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 09:34:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 635 transitions. [2022-07-19 09:34:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 09:34:55,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:55,466 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:55,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 09:34:55,680 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2022-07-19 09:34:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919059910] [2022-07-19 09:34:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:34:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:34:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:34:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:55,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:55,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919059910] [2022-07-19 09:34:55,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919059910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:55,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819221516] [2022-07-19 09:34:55,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:34:55,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:55,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:55,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:55,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:34:55,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:34:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:34:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:55,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:56,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:56,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-19 09:34:56,250 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 36 treesize of output 32 [2022-07-19 09:34:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:56,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819221516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:56,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:56,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-19 09:34:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070158634] [2022-07-19 09:34:56,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:56,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:34:56,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:34:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:34:56,309 INFO L87 Difference]: Start difference. First operand 425 states and 635 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 09:35:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:03,371 INFO L93 Difference]: Finished difference Result 7738 states and 12276 transitions. [2022-07-19 09:35:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-07-19 09:35:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-19 09:35:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:03,396 INFO L225 Difference]: With dead ends: 7738 [2022-07-19 09:35:03,396 INFO L226 Difference]: Without dead ends: 7736 [2022-07-19 09:35:03,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2970, Invalid=26786, Unknown=0, NotChecked=0, Total=29756 [2022-07-19 09:35:03,403 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 484 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 5186 mSolverCounterSat, 1614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 7525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1614 IncrementalHoareTripleChecker+Valid, 5186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:03,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 2201 Invalid, 7525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1614 Valid, 5186 Invalid, 0 Unknown, 725 Unchecked, 2.7s Time] [2022-07-19 09:35:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2022-07-19 09:35:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 1019. [2022-07-19 09:35:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 758 states have (on average 1.4313984168865435) internal successors, (1085), 759 states have internal predecessors, (1085), 250 states have call successors, (250), 10 states have call predecessors, (250), 10 states have return successors, (250), 249 states have call predecessors, (250), 250 states have call successors, (250) [2022-07-19 09:35:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1585 transitions. [2022-07-19 09:35:03,827 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1585 transitions. Word has length 71 [2022-07-19 09:35:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:03,828 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1585 transitions. [2022-07-19 09:35:03,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 09:35:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1585 transitions. [2022-07-19 09:35:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 09:35:03,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:03,829 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:03,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:04,048 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2022-07-19 09:35:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:04,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172903131] [2022-07-19 09:35:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:35:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:35:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:04,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:04,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172903131] [2022-07-19 09:35:04,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172903131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:04,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789867354] [2022-07-19 09:35:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:04,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:04,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:35:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:35:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:04,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:35:04,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:35:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:04,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:04,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:35:04,765 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 34 treesize of output 30 [2022-07-19 09:35:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789867354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:04,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:35:04,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-07-19 09:35:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265502695] [2022-07-19 09:35:04,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:04,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:35:04,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:35:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 09:35:04,810 INFO L87 Difference]: Start difference. First operand 1019 states and 1585 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 09:35:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:08,056 INFO L93 Difference]: Finished difference Result 2343 states and 3582 transitions. [2022-07-19 09:35:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 09:35:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-19 09:35:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:08,063 INFO L225 Difference]: With dead ends: 2343 [2022-07-19 09:35:08,063 INFO L226 Difference]: Without dead ends: 2341 [2022-07-19 09:35:08,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1287, Invalid=8613, Unknown=0, NotChecked=0, Total=9900 [2022-07-19 09:35:08,065 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 291 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:08,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 986 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 09:35:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-07-19 09:35:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 461. [2022-07-19 09:35:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 354 states have (on average 1.3587570621468927) internal successors, (481), 355 states have internal predecessors, (481), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-19 09:35:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 673 transitions. [2022-07-19 09:35:08,227 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 673 transitions. Word has length 71 [2022-07-19 09:35:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:08,227 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 673 transitions. [2022-07-19 09:35:08,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 09:35:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 673 transitions. [2022-07-19 09:35:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 09:35:08,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:08,228 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:08,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 09:35:08,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 09:35:08,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2022-07-19 09:35:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:08,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143655630] [2022-07-19 09:35:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:35:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:35:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:08,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143655630] [2022-07-19 09:35:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143655630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630443058] [2022-07-19 09:35:08,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:35:08,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:08,735 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:08,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 09:35:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:35:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:09,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:09,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630443058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:09,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:09,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2022-07-19 09:35:09,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617958247] [2022-07-19 09:35:09,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 09:35:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 09:35:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 09:35:09,504 INFO L87 Difference]: Start difference. First operand 461 states and 673 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-19 09:35:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:10,012 INFO L93 Difference]: Finished difference Result 537 states and 775 transitions. [2022-07-19 09:35:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 09:35:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2022-07-19 09:35:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:10,014 INFO L225 Difference]: With dead ends: 537 [2022-07-19 09:35:10,015 INFO L226 Difference]: Without dead ends: 505 [2022-07-19 09:35:10,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 09:35:10,015 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:10,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 205 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:35:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-19 09:35:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 471. [2022-07-19 09:35:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 362 states have (on average 1.339779005524862) internal successors, (485), 363 states have internal predecessors, (485), 98 states have call successors, (98), 10 states have call predecessors, (98), 10 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-19 09:35:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 681 transitions. [2022-07-19 09:35:10,169 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 681 transitions. Word has length 75 [2022-07-19 09:35:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:10,169 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 681 transitions. [2022-07-19 09:35:10,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-19 09:35:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 681 transitions. [2022-07-19 09:35:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:35:10,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:10,170 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:10,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-19 09:35:10,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 09:35:10,388 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2022-07-19 09:35:10,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211347679] [2022-07-19 09:35:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:10,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:35:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:35:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:35:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 09:35:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:35:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211347679] [2022-07-19 09:35:10,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211347679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176086063] [2022-07-19 09:35:10,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:35:10,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:10,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:10,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:10,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 09:35:10,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:35:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 09:35:10,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:10,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:35:10,679 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:10,680 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:35:10,699 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:10,700 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:35:10,871 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:35:10,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-19 09:35:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:10,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:10,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:35:10,975 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 30 treesize of output 26 [2022-07-19 09:35:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:11,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176086063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:11,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:11,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-07-19 09:35:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281840794] [2022-07-19 09:35:11,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:11,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 09:35:11,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 09:35:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-07-19 09:35:11,036 INFO L87 Difference]: Start difference. First operand 471 states and 681 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-19 09:35:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:25,173 INFO L93 Difference]: Finished difference Result 14381 states and 22875 transitions. [2022-07-19 09:35:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-19 09:35:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2022-07-19 09:35:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:25,220 INFO L225 Difference]: With dead ends: 14381 [2022-07-19 09:35:25,220 INFO L226 Difference]: Without dead ends: 14379 [2022-07-19 09:35:25,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 194 SyntacticMatches, 9 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34745 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5132, Invalid=72988, Unknown=0, NotChecked=0, Total=78120 [2022-07-19 09:35:25,229 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 450 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 10299 mSolverCounterSat, 2203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 12502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2203 IncrementalHoareTripleChecker+Valid, 10299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:25,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 3547 Invalid, 12502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2203 Valid, 10299 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 09:35:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14379 states. [2022-07-19 09:35:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14379 to 1115. [2022-07-19 09:35:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 842 states have (on average 1.4097387173396674) internal successors, (1187), 843 states have internal predecessors, (1187), 262 states have call successors, (262), 10 states have call predecessors, (262), 10 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-07-19 09:35:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1711 transitions. [2022-07-19 09:35:25,896 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1711 transitions. Word has length 95 [2022-07-19 09:35:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:25,897 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1711 transitions. [2022-07-19 09:35:25,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-19 09:35:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1711 transitions. [2022-07-19 09:35:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:35:25,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:25,899 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:25,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:26,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -737806033, now seen corresponding path program 2 times [2022-07-19 09:35:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:26,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884846556] [2022-07-19 09:35:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:26,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:35:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:35:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:35:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 09:35:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:35:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:26,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:26,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884846556] [2022-07-19 09:35:26,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884846556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:26,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247816948] [2022-07-19 09:35:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:35:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:26,292 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:26,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 09:35:26,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:35:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:26,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 09:35:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:26,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:35:26,663 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:26,663 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 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:35:26,718 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:35:26,719 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:35:26,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:35:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-19 09:35:26,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:29,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:35:29,610 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 34 treesize of output 30 [2022-07-19 09:35:29,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247816948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:29,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:35:29,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-19 09:35:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556172085] [2022-07-19 09:35:29,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:29,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 09:35:29,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 09:35:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1334, Unknown=1, NotChecked=0, Total=1482 [2022-07-19 09:35:29,645 INFO L87 Difference]: Start difference. First operand 1115 states and 1711 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-19 09:35:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:43,055 INFO L93 Difference]: Finished difference Result 5383 states and 8417 transitions. [2022-07-19 09:35:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-19 09:35:43,056 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 95 [2022-07-19 09:35:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:43,090 INFO L225 Difference]: With dead ends: 5383 [2022-07-19 09:35:43,091 INFO L226 Difference]: Without dead ends: 5381 [2022-07-19 09:35:43,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4689 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1060, Invalid=11817, Unknown=5, NotChecked=0, Total=12882 [2022-07-19 09:35:43,096 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 475 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 4433 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 4433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:43,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 2263 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 4433 Invalid, 0 Unknown, 186 Unchecked, 2.0s Time] [2022-07-19 09:35:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-07-19 09:35:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 1253. [2022-07-19 09:35:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 942 states have (on average 1.4171974522292994) internal successors, (1335), 943 states have internal predecessors, (1335), 298 states have call successors, (298), 12 states have call predecessors, (298), 12 states have return successors, (298), 297 states have call predecessors, (298), 298 states have call successors, (298) [2022-07-19 09:35:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1931 transitions. [2022-07-19 09:35:43,754 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1931 transitions. Word has length 95 [2022-07-19 09:35:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:43,754 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1931 transitions. [2022-07-19 09:35:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-19 09:35:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1931 transitions. [2022-07-19 09:35:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 09:35:43,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:43,763 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:43,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:43,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:43,980 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:43,980 INFO L85 PathProgramCache]: Analyzing trace with hash 519418531, now seen corresponding path program 9 times [2022-07-19 09:35:43,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:43,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932299234] [2022-07-19 09:35:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:35:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:35:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:35:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 09:35:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:35:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:44,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932299234] [2022-07-19 09:35:44,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932299234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:44,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997882654] [2022-07-19 09:35:44,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:35:44,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:44,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:44,145 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:44,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 09:35:44,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 09:35:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 09:35:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:44,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:35:44,500 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:44,500 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:35:44,707 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:35:44,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-19 09:35:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:44,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:44,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:35:44,794 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 30 treesize of output 26 [2022-07-19 09:35:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:35:44,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997882654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:44,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:44,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-07-19 09:35:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643462968] [2022-07-19 09:35:44,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:35:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:35:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-19 09:35:44,842 INFO L87 Difference]: Start difference. First operand 1253 states and 1931 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 09:36:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:34,073 INFO L93 Difference]: Finished difference Result 56420 states and 90300 transitions. [2022-07-19 09:36:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2022-07-19 09:36:34,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 99 [2022-07-19 09:36:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:34,233 INFO L225 Difference]: With dead ends: 56420 [2022-07-19 09:36:34,233 INFO L226 Difference]: Without dead ends: 56418 [2022-07-19 09:36:34,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 201 SyntacticMatches, 8 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157170 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=15652, Invalid=317854, Unknown=0, NotChecked=0, Total=333506 [2022-07-19 09:36:34,270 INFO L413 NwaCegarLoop]: 1458 mSDtfsCounter, 690 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 22735 mSolverCounterSat, 5125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 8258 SdHoareTripleChecker+Invalid, 27860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5125 IncrementalHoareTripleChecker+Valid, 22735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:34,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 8258 Invalid, 27860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5125 Valid, 22735 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-07-19 09:36:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2022-07-19 09:36:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 3183. [2022-07-19 09:36:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2368 states have (on average 1.4484797297297298) internal successors, (3430), 2369 states have internal predecessors, (3430), 802 states have call successors, (802), 12 states have call predecessors, (802), 12 states have return successors, (802), 801 states have call predecessors, (802), 802 states have call successors, (802) [2022-07-19 09:36:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5034 transitions. [2022-07-19 09:36:37,068 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5034 transitions. Word has length 99 [2022-07-19 09:36:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:37,068 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 5034 transitions. [2022-07-19 09:36:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 09:36:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5034 transitions. [2022-07-19 09:36:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 09:36:37,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:37,072 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:37,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 09:36:37,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:37,288 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:37,288 INFO L85 PathProgramCache]: Analyzing trace with hash 943065253, now seen corresponding path program 2 times [2022-07-19 09:36:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:37,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500648004] [2022-07-19 09:36:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:37,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:36:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:36:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 09:36:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:36:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:36:37,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500648004] [2022-07-19 09:36:37,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500648004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172303829] [2022-07-19 09:36:37,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:36:37,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:37,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:37,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:36:37,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 09:36:37,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:36:37,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 09:36:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:37,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:36:37,804 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:37,804 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:36:38,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:36:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:38,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:40,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:36:40,354 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 34 treesize of output 30 [2022-07-19 09:36:40,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172303829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:40,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:40,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-19 09:36:40,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396229955] [2022-07-19 09:36:40,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:40,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 09:36:40,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 09:36:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1569, Unknown=1, NotChecked=0, Total=1722 [2022-07-19 09:36:40,391 INFO L87 Difference]: Start difference. First operand 3183 states and 5034 transitions. Second operand has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-19 09:37:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:03,078 INFO L93 Difference]: Finished difference Result 19001 states and 30290 transitions. [2022-07-19 09:37:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-19 09:37:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 99 [2022-07-19 09:37:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:03,115 INFO L225 Difference]: With dead ends: 19001 [2022-07-19 09:37:03,115 INFO L226 Difference]: Without dead ends: 18999 [2022-07-19 09:37:03,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1569, Invalid=20182, Unknown=5, NotChecked=0, Total=21756 [2022-07-19 09:37:03,122 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 842 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 7218 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 9031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 7218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:03,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2836 Invalid, 9031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 7218 Invalid, 0 Unknown, 431 Unchecked, 3.2s Time] [2022-07-19 09:37:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18999 states. [2022-07-19 09:37:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18999 to 3547. [2022-07-19 09:37:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 2632 states have (on average 1.452127659574468) internal successors, (3822), 2633 states have internal predecessors, (3822), 898 states have call successors, (898), 16 states have call predecessors, (898), 16 states have return successors, (898), 897 states have call predecessors, (898), 898 states have call successors, (898) [2022-07-19 09:37:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 5618 transitions. [2022-07-19 09:37:05,220 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 5618 transitions. Word has length 99 [2022-07-19 09:37:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:05,220 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 5618 transitions. [2022-07-19 09:37:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-19 09:37:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 5618 transitions. [2022-07-19 09:37:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 09:37:05,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:05,225 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:05,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 09:37:05,439 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1220267295, now seen corresponding path program 3 times [2022-07-19 09:37:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:05,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836360327] [2022-07-19 09:37:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:37:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:37:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:37:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 09:37:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:37:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 09:37:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-19 09:37:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 09:37:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-19 09:37:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836360327] [2022-07-19 09:37:05,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836360327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049581590] [2022-07-19 09:37:05,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:37:05,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:05,739 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:37:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 09:37:05,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 09:37:05,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:37:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:06,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:06,127 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:06,127 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 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:37:06,180 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:06,181 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 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:37:06,256 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:37:06,256 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:06,308 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:37:06,308 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:06,358 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:37:06,358 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:06,431 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:37:06,431 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:06,482 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:37:06,482 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:06,535 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:37:06,535 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:37:06,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:37:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 106 proven. 78 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 09:37:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:09,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049581590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:09,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:09,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 09:37:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059001601] [2022-07-19 09:37:09,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:37:09,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:37:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=884, Unknown=2, NotChecked=0, Total=992 [2022-07-19 09:37:09,780 INFO L87 Difference]: Start difference. First operand 3547 states and 5618 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-19 09:37:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:13,075 INFO L93 Difference]: Finished difference Result 3783 states and 5859 transitions. [2022-07-19 09:37:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 09:37:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 103 [2022-07-19 09:37:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:13,083 INFO L225 Difference]: With dead ends: 3783 [2022-07-19 09:37:13,083 INFO L226 Difference]: Without dead ends: 3781 [2022-07-19 09:37:13,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=456, Invalid=3324, Unknown=2, NotChecked=0, Total=3782 [2022-07-19 09:37:13,085 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 204 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:13,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 688 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1052 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-07-19 09:37:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-07-19 09:37:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 2020. [2022-07-19 09:37:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 1498 states have (on average 1.4425901201602136) internal successors, (2161), 1499 states have internal predecessors, (2161), 503 states have call successors, (503), 18 states have call predecessors, (503), 18 states have return successors, (503), 502 states have call predecessors, (503), 503 states have call successors, (503) [2022-07-19 09:37:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3167 transitions. [2022-07-19 09:37:14,802 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3167 transitions. Word has length 103 [2022-07-19 09:37:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:14,802 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3167 transitions. [2022-07-19 09:37:14,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-19 09:37:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3167 transitions. [2022-07-19 09:37:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 09:37:14,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:14,805 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:14,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 09:37:15,019 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2058870425, now seen corresponding path program 10 times [2022-07-19 09:37:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339936817] [2022-07-19 09:37:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:37:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:37:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:37:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 09:37:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:37:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:37:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339936817] [2022-07-19 09:37:15,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339936817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129537] [2022-07-19 09:37:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:37:15,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:15,218 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:37:15,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 09:37:15,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:37:15,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:37:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:15,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:15,657 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:37:15,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-19 09:37:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:37:15,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:15,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:15,739 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 30 treesize of output 26 [2022-07-19 09:37:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:37:15,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:15,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:15,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2022-07-19 09:37:15,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898711522] [2022-07-19 09:37:15,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:37:15,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:37:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:37:15,803 INFO L87 Difference]: Start difference. First operand 2020 states and 3167 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)