./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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-cav19/array_init_var_plus_ind.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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:42:38,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:42:38,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:42:38,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:42:38,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:42:38,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:42:38,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:42:38,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:42:38,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:42:38,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:42:38,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:42:38,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:42:38,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:42:38,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:42:38,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:42:38,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:42:38,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:42:38,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:42:38,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:42:38,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:42:38,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:42:38,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:42:38,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:42:38,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:42:38,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:42:38,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:42:38,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:42:38,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:42:38,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:42:38,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:42:38,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:42:38,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:42:38,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:42:38,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:42:38,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:42:38,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:42:38,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:42:38,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:42:38,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:42:38,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:42:38,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:42:38,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:42:38,219 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:42:38,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:42:38,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:42:38,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:42:38,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:42:38,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:42:38,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:42:38,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:42:38,224 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:42:38,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:42:38,225 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:42:38,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:42:38,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:42:38,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:42:38,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:42:38,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:42:38,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:42:38,226 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:42:38,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:42:38,226 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:42:38,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:42:38,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:42:38,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:42:38,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:42:38,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:42:38,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:42:38,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:42:38,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:42:38,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:42:38,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:42:38,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:42:38,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:42:38,229 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:42:38,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:42:38,229 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:42:38,229 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2023-02-13 22:42:38,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:42:38,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:42:38,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:42:38,461 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:42:38,461 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:42:38,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2023-02-13 22:42:39,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:42:39,647 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:42:39,648 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2023-02-13 22:42:39,651 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe62546a1/905dcc91ce01432cb7437ad53e8bbcd3/FLAG71a7b649b [2023-02-13 22:42:39,660 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe62546a1/905dcc91ce01432cb7437ad53e8bbcd3 [2023-02-13 22:42:39,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:42:39,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:42:39,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:42:39,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:42:39,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:42:39,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec91dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39, skipping insertion in model container [2023-02-13 22:42:39,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:42:39,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:42:39,759 WARN L237 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-cav19/array_init_var_plus_ind.c[414,427] [2023-02-13 22:42:39,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:42:39,780 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:42:39,788 WARN L237 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-cav19/array_init_var_plus_ind.c[414,427] [2023-02-13 22:42:39,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:42:39,803 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:42:39,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39 WrapperNode [2023-02-13 22:42:39,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:42:39,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:42:39,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:42:39,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:42:39,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,825 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2023-02-13 22:42:39,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:42:39,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:42:39,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:42:39,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:42:39,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:42:39,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:42:39,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:42:39,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:42:39,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (1/1) ... [2023-02-13 22:42:39,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:42:39,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:39,894 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) [2023-02-13 22:42:39,929 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 [2023-02-13 22:42:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:42:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:42:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:42:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:42:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:42:39,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:42:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:42:39,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:42:39,985 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:42:39,986 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:42:40,095 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:42:40,100 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:42:40,101 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-13 22:42:40,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:42:40 BoogieIcfgContainer [2023-02-13 22:42:40,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:42:40,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:42:40,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:42:40,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:42:40,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:42:39" (1/3) ... [2023-02-13 22:42:40,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3991d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:42:40, skipping insertion in model container [2023-02-13 22:42:40,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:39" (2/3) ... [2023-02-13 22:42:40,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3991d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:42:40, skipping insertion in model container [2023-02-13 22:42:40,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:42:40" (3/3) ... [2023-02-13 22:42:40,108 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2023-02-13 22:42:40,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:42:40,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:42:40,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:42:40,163 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28e71674, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:42:40,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:42:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2023-02-13 22:42:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-13 22:42:40,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:40,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:40,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2023-02-13 22:42:40,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:40,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970080521] [2023-02-13 22:42:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:40,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:40,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970080521] [2023-02-13 22:42:40,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970080521] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:42:40,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:42:40,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 22:42:40,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145376873] [2023-02-13 22:42:40,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:42:40,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 22:42:40,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 22:42:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:42:40,368 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-13 22:42:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:40,378 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2023-02-13 22:42:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 22:42:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-02-13 22:42:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:40,384 INFO L225 Difference]: With dead ends: 27 [2023-02-13 22:42:40,384 INFO L226 Difference]: Without dead ends: 12 [2023-02-13 22:42:40,386 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 [2023-02-13 22:42:40,390 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2023-02-13 22:42:40,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-13 22:42:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-13 22:42:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-13 22:42:40,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2023-02-13 22:42:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:40,430 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-13 22:42:40,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-13 22:42:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-13 22:42:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-13 22:42:40,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:40,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 22:42:40,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2023-02-13 22:42:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586603176] [2023-02-13 22:42:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:40,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586603176] [2023-02-13 22:42:40,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586603176] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:42:40,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:42:40,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:42:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044623190] [2023-02-13 22:42:40,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:42:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:42:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:42:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:40,567 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-13 22:42:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:40,605 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-02-13 22:42:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:42:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-02-13 22:42:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:40,607 INFO L225 Difference]: With dead ends: 29 [2023-02-13 22:42:40,607 INFO L226 Difference]: Without dead ends: 22 [2023-02-13 22:42:40,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:40,608 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:40,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-13 22:42:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2023-02-13 22:42:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-02-13 22:42:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-13 22:42:40,612 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-13 22:42:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:40,612 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-13 22:42:40,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-13 22:42:40,612 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-13 22:42:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 22:42:40,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:40,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:40,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 22:42:40,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:40,614 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2023-02-13 22:42:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:40,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334733663] [2023-02-13 22:42:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:40,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334733663] [2023-02-13 22:42:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334733663] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:42:40,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:42:40,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 22:42:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122020646] [2023-02-13 22:42:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:42:40,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:42:40,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:42:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:40,710 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-13 22:42:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:40,736 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-02-13 22:42:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:42:40,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2023-02-13 22:42:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:40,737 INFO L225 Difference]: With dead ends: 23 [2023-02-13 22:42:40,737 INFO L226 Difference]: Without dead ends: 15 [2023-02-13 22:42:40,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:40,739 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:40,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-13 22:42:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-13 22:42:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-13 22:42:40,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-02-13 22:42:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:40,742 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-13 22:42:40,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-13 22:42:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-13 22:42:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 22:42:40,743 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:40,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 22:42:40,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2023-02-13 22:42:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:40,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177294641] [2023-02-13 22:42:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:40,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:40,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177294641] [2023-02-13 22:42:40,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177294641] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:40,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552412135] [2023-02-13 22:42:40,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:40,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:40,813 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) [2023-02-13 22:42:40,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:42:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:42:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:40,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:41,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552412135] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:41,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:41,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-02-13 22:42:41,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963997535] [2023-02-13 22:42:41,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:41,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:42:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:42:41,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:42:41,011 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:41,082 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-13 22:42:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:42:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-13 22:42:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:41,083 INFO L225 Difference]: With dead ends: 45 [2023-02-13 22:42:41,084 INFO L226 Difference]: Without dead ends: 36 [2023-02-13 22:42:41,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-02-13 22:42:41,085 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:41,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-13 22:42:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2023-02-13 22:42:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-13 22:42:41,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2023-02-13 22:42:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:41,089 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-13 22:42:41,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:41,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-13 22:42:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-13 22:42:41,090 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:41,090 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:41,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:41,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:41,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2023-02-13 22:42:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:41,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62566717] [2023-02-13 22:42:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:41,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:41,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62566717] [2023-02-13 22:42:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62566717] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682701839] [2023-02-13 22:42:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:41,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:41,554 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) [2023-02-13 22:42:41,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:42:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:41,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-13 22:42:41,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:41,723 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:41,807 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:41,850 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2023-02-13 22:42:41,853 INFO L350 Elim1Store]: Elim1 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 20 [2023-02-13 22:42:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:41,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682701839] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:41,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:41,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-02-13 22:42:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945130804] [2023-02-13 22:42:41,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:41,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-13 22:42:41,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-13 22:42:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-02-13 22:42:41,887 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:42,014 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-02-13 22:42:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-13 22:42:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-13 22:42:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:42,015 INFO L225 Difference]: With dead ends: 37 [2023-02-13 22:42:42,016 INFO L226 Difference]: Without dead ends: 35 [2023-02-13 22:42:42,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-02-13 22:42:42,019 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:42,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:42:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-13 22:42:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2023-02-13 22:42:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-13 22:42:42,032 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2023-02-13 22:42:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:42,032 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-13 22:42:42,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-13 22:42:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 22:42:42,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:42,034 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:42,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 22:42:42,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:42,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2023-02-13 22:42:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:42,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698848357] [2023-02-13 22:42:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:42,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:42,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698848357] [2023-02-13 22:42:42,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698848357] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:42,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512648689] [2023-02-13 22:42:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:42:42,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:42,557 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) [2023-02-13 22:42:42,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:42:42,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:42:42,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:42,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-13 22:42:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:42,702 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:42:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:42:42,755 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:42:42,814 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:42,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:42,941 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:42:42,946 INFO L350 Elim1Store]: Elim1 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 146 treesize of output 138 [2023-02-13 22:42:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:43,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512648689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:43,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:43,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-02-13 22:42:43,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823769216] [2023-02-13 22:42:43,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:43,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-13 22:42:43,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:43,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-13 22:42:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-13 22:42:43,048 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:43,257 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-02-13 22:42:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-13 22:42:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-13 22:42:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:43,258 INFO L225 Difference]: With dead ends: 32 [2023-02-13 22:42:43,258 INFO L226 Difference]: Without dead ends: 30 [2023-02-13 22:42:43,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-02-13 22:42:43,259 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 60 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:43,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 80 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:42:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-13 22:42:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-02-13 22:42:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2023-02-13 22:42:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-13 22:42:43,262 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-02-13 22:42:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:43,262 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-13 22:42:43,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:43,263 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-13 22:42:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-13 22:42:43,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:43,263 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:43,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:43,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:43,468 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2023-02-13 22:42:43,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100837602] [2023-02-13 22:42:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:43,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100837602] [2023-02-13 22:42:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100837602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:43,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069967176] [2023-02-13 22:42:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:43,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:43,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:43,534 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) [2023-02-13 22:42:43,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:42:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:42:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:43,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:43,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069967176] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:43,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:43,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-13 22:42:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103635141] [2023-02-13 22:42:43,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:42:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:42:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:42:43,637 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:43,664 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-02-13 22:42:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 22:42:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-13 22:42:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:43,665 INFO L225 Difference]: With dead ends: 36 [2023-02-13 22:42:43,665 INFO L226 Difference]: Without dead ends: 24 [2023-02-13 22:42:43,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:42:43,666 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:43,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-13 22:42:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-13 22:42:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-02-13 22:42:43,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2023-02-13 22:42:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:43,669 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-02-13 22:42:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-02-13 22:42:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-13 22:42:43,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:43,670 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:43,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:43,874 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2023-02-13 22:42:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:43,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276687379] [2023-02-13 22:42:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:44,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:44,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276687379] [2023-02-13 22:42:44,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276687379] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:44,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799108756] [2023-02-13 22:42:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:42:44,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:44,057 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) [2023-02-13 22:42:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:42:44,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:42:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-13 22:42:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:44,142 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:42:44,197 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2023-02-13 22:42:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:42:44,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:42:44,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-02-13 22:42:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:44,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:44,643 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 26 [2023-02-13 22:42:44,651 INFO L350 Elim1Store]: Elim1 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 190 treesize of output 178 [2023-02-13 22:42:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:44,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799108756] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:44,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2023-02-13 22:42:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457760195] [2023-02-13 22:42:44,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:44,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-13 22:42:44,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:44,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-13 22:42:44,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:42:44,786 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 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) [2023-02-13 22:42:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:45,173 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-02-13 22:42:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 22:42:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 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 21 [2023-02-13 22:42:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:45,174 INFO L225 Difference]: With dead ends: 50 [2023-02-13 22:42:45,174 INFO L226 Difference]: Without dead ends: 29 [2023-02-13 22:42:45,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2023-02-13 22:42:45,175 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:45,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 84 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:42:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-13 22:42:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-13 22:42:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-02-13 22:42:45,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2023-02-13 22:42:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:45,178 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-02-13 22:42:45,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 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) [2023-02-13 22:42:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-02-13 22:42:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-13 22:42:45,178 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:45,179 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:45,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:45,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:45,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:45,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1204846017, now seen corresponding path program 1 times [2023-02-13 22:42:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:45,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071516898] [2023-02-13 22:42:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:45,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 22:42:45,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071516898] [2023-02-13 22:42:45,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071516898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411145563] [2023-02-13 22:42:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:45,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:45,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:45,489 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) [2023-02-13 22:42:45,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:42:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:42:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 22:42:45,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 22:42:45,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411145563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:45,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:45,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-02-13 22:42:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639783659] [2023-02-13 22:42:45,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-13 22:42:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-13 22:42:45,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2023-02-13 22:42:45,748 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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) [2023-02-13 22:42:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:45,881 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2023-02-13 22:42:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:42:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-13 22:42:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:45,885 INFO L225 Difference]: With dead ends: 120 [2023-02-13 22:42:45,885 INFO L226 Difference]: Without dead ends: 111 [2023-02-13 22:42:45,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2023-02-13 22:42:45,887 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 280 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:45,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-13 22:42:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 48. [2023-02-13 22:42:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 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) [2023-02-13 22:42:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-13 22:42:45,898 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2023-02-13 22:42:45,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:45,898 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-13 22:42:45,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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) [2023-02-13 22:42:45,898 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-13 22:42:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-13 22:42:45,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:45,899 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:45,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-13 22:42:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:46,106 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 3 times [2023-02-13 22:42:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431271318] [2023-02-13 22:42:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:46,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431271318] [2023-02-13 22:42:46,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431271318] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8596723] [2023-02-13 22:42:46,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:42:46,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:46,465 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) [2023-02-13 22:42:46,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:42:46,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-13 22:42:46,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-13 22:42:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:46,559 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:42:46,591 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:42:46,592 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:42:46,620 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:42:46,620 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:42:46,656 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:46,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:46,942 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:42:46,945 INFO L350 Elim1Store]: Elim1 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 146 treesize of output 138 [2023-02-13 22:42:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:42:47,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8596723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:47,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:47,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-02-13 22:42:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543622884] [2023-02-13 22:42:47,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:47,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-13 22:42:47,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-13 22:42:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-02-13 22:42:47,085 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2023-02-13 22:42:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:47,252 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-02-13 22:42:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:42:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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 27 [2023-02-13 22:42:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:47,254 INFO L225 Difference]: With dead ends: 57 [2023-02-13 22:42:47,254 INFO L226 Difference]: Without dead ends: 55 [2023-02-13 22:42:47,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 22:42:47,255 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:47,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 64 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:42:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-13 22:42:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2023-02-13 22:42:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-02-13 22:42:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-02-13 22:42:47,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2023-02-13 22:42:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:47,260 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-02-13 22:42:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2023-02-13 22:42:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-02-13 22:42:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-13 22:42:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:47,261 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:47,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-13 22:42:47,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:47,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 4 times [2023-02-13 22:42:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:47,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537720129] [2023-02-13 22:42:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:47,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537720129] [2023-02-13 22:42:47,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537720129] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593722593] [2023-02-13 22:42:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:42:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:47,849 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) [2023-02-13 22:42:47,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:42:47,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:42:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-13 22:42:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:47,962 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:42:48,011 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:42:48,011 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2023-02-13 22:42:48,065 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-02-13 22:42:48,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2023-02-13 22:42:48,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:42:48,235 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 12 [2023-02-13 22:42:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:48,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:48,764 INFO L350 Elim1Store]: Elim1 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 65 treesize of output 61 [2023-02-13 22:42:48,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:42:48,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2747 treesize of output 2675 [2023-02-13 22:42:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:50,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593722593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:50,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:50,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 41 [2023-02-13 22:42:50,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164089755] [2023-02-13 22:42:50,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:50,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-13 22:42:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-13 22:42:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2023-02-13 22:42:50,015 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 41 states have internal predecessors, (80), 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) [2023-02-13 22:42:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:50,623 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-02-13 22:42:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 22:42:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-13 22:42:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:50,624 INFO L225 Difference]: With dead ends: 61 [2023-02-13 22:42:50,624 INFO L226 Difference]: Without dead ends: 59 [2023-02-13 22:42:50,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2023-02-13 22:42:50,625 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:50,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 137 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:42:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-13 22:42:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-02-13 22:42:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-02-13 22:42:50,637 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 31 [2023-02-13 22:42:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:50,637 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-02-13 22:42:50,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 41 states have internal predecessors, (80), 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) [2023-02-13 22:42:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-02-13 22:42:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-13 22:42:50,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:50,643 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:50,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:50,848 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,SelfDestructingSolverStorable10 [2023-02-13 22:42:50,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 5 times [2023-02-13 22:42:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715185976] [2023-02-13 22:42:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:51,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715185976] [2023-02-13 22:42:51,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715185976] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138596695] [2023-02-13 22:42:51,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:42:51,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:51,205 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) [2023-02-13 22:42:51,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:42:51,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-13 22:42:51,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:51,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-13 22:42:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:51,462 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:51,651 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:51,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:51,820 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:51,823 INFO L350 Elim1Store]: Elim1 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 24 [2023-02-13 22:42:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:52,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138596695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:52,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:52,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2023-02-13 22:42:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377349097] [2023-02-13 22:42:52,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-13 22:42:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-13 22:42:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2023-02-13 22:42:52,078 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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) [2023-02-13 22:42:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:52,508 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2023-02-13 22:42:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-13 22:42:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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 35 [2023-02-13 22:42:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:52,510 INFO L225 Difference]: With dead ends: 82 [2023-02-13 22:42:52,510 INFO L226 Difference]: Without dead ends: 80 [2023-02-13 22:42:52,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2023-02-13 22:42:52,511 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:52,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 321 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:42:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-13 22:42:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2023-02-13 22:42:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 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) [2023-02-13 22:42:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-02-13 22:42:52,516 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 35 [2023-02-13 22:42:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:52,516 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-02-13 22:42:52,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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) [2023-02-13 22:42:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-02-13 22:42:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 22:42:52,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:52,518 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:52,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-13 22:42:52,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:52,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 6 times [2023-02-13 22:42:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:52,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336313855] [2023-02-13 22:42:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:52,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336313855] [2023-02-13 22:42:53,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336313855] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140079894] [2023-02-13 22:42:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:42:53,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:53,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:53,061 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) [2023-02-13 22:42:53,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 22:42:53,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-13 22:42:53,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:53,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-13 22:42:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:53,333 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:42:53,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:42:53,389 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:42:53,582 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:42:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:53,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:53,827 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:42:53,829 INFO L350 Elim1Store]: Elim1 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 146 treesize of output 138 [2023-02-13 22:42:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:54,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140079894] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:54,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:54,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2023-02-13 22:42:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672957671] [2023-02-13 22:42:54,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:54,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-13 22:42:54,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:54,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-13 22:42:54,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2442, Unknown=0, NotChecked=0, Total=2652 [2023-02-13 22:42:54,095 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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) [2023-02-13 22:42:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:54,553 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2023-02-13 22:42:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-13 22:42:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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 38 [2023-02-13 22:42:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:54,554 INFO L225 Difference]: With dead ends: 80 [2023-02-13 22:42:54,554 INFO L226 Difference]: Without dead ends: 78 [2023-02-13 22:42:54,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2023-02-13 22:42:54,556 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:54,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 224 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:42:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-13 22:42:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2023-02-13 22:42:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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) [2023-02-13 22:42:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-02-13 22:42:54,561 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2023-02-13 22:42:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:54,562 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-02-13 22:42:54,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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) [2023-02-13 22:42:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-02-13 22:42:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-13 22:42:54,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:54,562 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:54,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:54,767 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,SelfDestructingSolverStorable12 [2023-02-13 22:42:54,767 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1219673394, now seen corresponding path program 7 times [2023-02-13 22:42:54,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:54,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769430636] [2023-02-13 22:42:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:54,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:54,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769430636] [2023-02-13 22:42:54,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769430636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800255721] [2023-02-13 22:42:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:42:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:54,885 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) [2023-02-13 22:42:54,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 22:42:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:54,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 22:42:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:55,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:55,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800255721] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:55,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:55,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-13 22:42:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76535040] [2023-02-13 22:42:55,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-13 22:42:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-13 22:42:55,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-13 22:42:55,212 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:55,266 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-02-13 22:42:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 22:42:55,266 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-13 22:42:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:55,267 INFO L225 Difference]: With dead ends: 84 [2023-02-13 22:42:55,268 INFO L226 Difference]: Without dead ends: 60 [2023-02-13 22:42:55,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-13 22:42:55,268 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:55,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-13 22:42:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-13 22:42:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 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) [2023-02-13 22:42:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-02-13 22:42:55,276 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 39 [2023-02-13 22:42:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:55,277 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-02-13 22:42:55,277 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), 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) [2023-02-13 22:42:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-02-13 22:42:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 22:42:55,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:55,278 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:55,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:55,483 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,SelfDestructingSolverStorable13 [2023-02-13 22:42:55,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 8 times [2023-02-13 22:42:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224702453] [2023-02-13 22:42:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:55,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224702453] [2023-02-13 22:42:55,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224702453] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:55,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384377008] [2023-02-13 22:42:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:42:55,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:55,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:55,921 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) [2023-02-13 22:42:55,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-13 22:42:55,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:42:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-13 22:42:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:56,189 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:42:56,252 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2023-02-13 22:42:56,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:42:56,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:42:56,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:42:56,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-02-13 22:42:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:56,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:57,199 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 26 [2023-02-13 22:42:57,202 INFO L350 Elim1Store]: Elim1 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 190 treesize of output 178 [2023-02-13 22:42:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:57,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384377008] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:57,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:57,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 59 [2023-02-13 22:42:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829837905] [2023-02-13 22:42:57,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-13 22:42:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-13 22:42:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2881, Unknown=0, NotChecked=0, Total=3422 [2023-02-13 22:42:57,656 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 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) [2023-02-13 22:42:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:59,118 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2023-02-13 22:42:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-13 22:42:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 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 42 [2023-02-13 22:42:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:59,119 INFO L225 Difference]: With dead ends: 105 [2023-02-13 22:42:59,119 INFO L226 Difference]: Without dead ends: 60 [2023-02-13 22:42:59,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=950, Invalid=5692, Unknown=0, NotChecked=0, Total=6642 [2023-02-13 22:42:59,121 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:59,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 227 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:42:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-13 22:42:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-13 22:42:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 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) [2023-02-13 22:42:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2023-02-13 22:42:59,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 42 [2023-02-13 22:42:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:59,127 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2023-02-13 22:42:59,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 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) [2023-02-13 22:42:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-02-13 22:42:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-13 22:42:59,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:59,129 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:59,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:59,333 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,SelfDestructingSolverStorable14 [2023-02-13 22:42:59,333 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 648512456, now seen corresponding path program 9 times [2023-02-13 22:42:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759979102] [2023-02-13 22:42:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759979102] [2023-02-13 22:42:59,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759979102] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197147486] [2023-02-13 22:42:59,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:42:59,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:59,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:59,862 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) [2023-02-13 22:42:59,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-13 22:42:59,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-13 22:42:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:42:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-13 22:42:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:00,228 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:43:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:00,286 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:43:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:00,322 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:43:00,567 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:00,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:02,296 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:43:02,308 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 62 [2023-02-13 22:43:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:43:02,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197147486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:02,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:02,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2023-02-13 22:43:02,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627215125] [2023-02-13 22:43:02,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-13 22:43:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-13 22:43:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3756, Unknown=2, NotChecked=0, Total=4032 [2023-02-13 22:43:02,667 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 64 states, 64 states have (on average 2.171875) internal successors, (139), 64 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:03,366 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-02-13 22:43:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-13 22:43:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 64 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-13 22:43:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:03,367 INFO L225 Difference]: With dead ends: 69 [2023-02-13 22:43:03,367 INFO L226 Difference]: Without dead ends: 67 [2023-02-13 22:43:03,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=550, Invalid=5928, Unknown=2, NotChecked=0, Total=6480 [2023-02-13 22:43:03,368 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:03,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 313 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:43:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-13 22:43:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2023-02-13 22:43:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 states have internal predecessors, (69), 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) [2023-02-13 22:43:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-02-13 22:43:03,374 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 48 [2023-02-13 22:43:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:03,374 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-02-13 22:43:03,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 64 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-02-13 22:43:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-13 22:43:03,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:03,375 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:03,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:03,575 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,SelfDestructingSolverStorable15 [2023-02-13 22:43:03,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 10 times [2023-02-13 22:43:03,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951118501] [2023-02-13 22:43:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:04,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951118501] [2023-02-13 22:43:04,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951118501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:04,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743450181] [2023-02-13 22:43:04,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:43:04,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:04,081 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) [2023-02-13 22:43:04,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-13 22:43:04,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:43:04,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-13 22:43:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:04,267 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:43:04,303 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-13 22:43:04,303 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2023-02-13 22:43:04,439 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:04,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:05,994 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:43:05,997 INFO L350 Elim1Store]: Elim1 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 146 treesize of output 138 [2023-02-13 22:43:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:06,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743450181] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:06,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:06,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 55 [2023-02-13 22:43:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597166250] [2023-02-13 22:43:06,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-13 22:43:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-13 22:43:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2777, Unknown=2, NotChecked=0, Total=2970 [2023-02-13 22:43:06,495 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 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) [2023-02-13 22:43:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:07,313 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-02-13 22:43:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-13 22:43:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 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 52 [2023-02-13 22:43:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:07,313 INFO L225 Difference]: With dead ends: 73 [2023-02-13 22:43:07,314 INFO L226 Difference]: Without dead ends: 71 [2023-02-13 22:43:07,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=419, Invalid=4835, Unknown=2, NotChecked=0, Total=5256 [2023-02-13 22:43:07,315 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:07,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 372 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:43:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-13 22:43:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2023-02-13 22:43:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 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) [2023-02-13 22:43:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-02-13 22:43:07,328 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 52 [2023-02-13 22:43:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:07,328 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-02-13 22:43:07,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 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) [2023-02-13 22:43:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-02-13 22:43:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-13 22:43:07,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:07,329 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:07,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-13 22:43:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:07,534 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 11 times [2023-02-13 22:43:07,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088168252] [2023-02-13 22:43:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088168252] [2023-02-13 22:43:08,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088168252] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73982670] [2023-02-13 22:43:08,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:43:08,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:08,065 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) [2023-02-13 22:43:08,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-13 22:43:08,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-13 22:43:08,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-13 22:43:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:08,523 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:08,904 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:08,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:09,204 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:09,207 INFO L350 Elim1Store]: Elim1 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 24 [2023-02-13 22:43:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:09,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73982670] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:09,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:09,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 74 [2023-02-13 22:43:09,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970705519] [2023-02-13 22:43:09,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:09,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-13 22:43:09,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:09,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-13 22:43:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5105, Unknown=0, NotChecked=0, Total=5402 [2023-02-13 22:43:09,703 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 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) [2023-02-13 22:43:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:10,636 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2023-02-13 22:43:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-13 22:43:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 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 56 [2023-02-13 22:43:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:10,637 INFO L225 Difference]: With dead ends: 106 [2023-02-13 22:43:10,637 INFO L226 Difference]: Without dead ends: 104 [2023-02-13 22:43:10,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=7221, Unknown=0, NotChecked=0, Total=7656 [2023-02-13 22:43:10,639 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:10,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 780 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1873 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 22:43:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-13 22:43:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2023-02-13 22:43:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-02-13 22:43:10,652 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 56 [2023-02-13 22:43:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:10,653 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-02-13 22:43:10,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 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) [2023-02-13 22:43:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-02-13 22:43:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-13 22:43:10,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:10,653 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:10,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-13 22:43:10,859 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,SelfDestructingSolverStorable17 [2023-02-13 22:43:10,859 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 12 times [2023-02-13 22:43:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579351773] [2023-02-13 22:43:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:11,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579351773] [2023-02-13 22:43:11,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579351773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782225799] [2023-02-13 22:43:11,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:43:11,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:11,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:11,453 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) [2023-02-13 22:43:11,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-13 22:43:11,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-13 22:43:11,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-13 22:43:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:11,643 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:43:11,696 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-13 22:43:11,696 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2023-02-13 22:43:11,887 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:11,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:12,534 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:43:12,536 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 62 [2023-02-13 22:43:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:13,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782225799] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:13,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:13,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 62 [2023-02-13 22:43:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289725715] [2023-02-13 22:43:13,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-13 22:43:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-13 22:43:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3563, Unknown=1, NotChecked=0, Total=3782 [2023-02-13 22:43:13,024 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 62 states, 62 states have (on average 2.3225806451612905) internal successors, (144), 62 states have internal predecessors, (144), 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) [2023-02-13 22:43:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:14,061 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2023-02-13 22:43:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-13 22:43:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.3225806451612905) internal successors, (144), 62 states have internal predecessors, (144), 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 59 [2023-02-13 22:43:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:14,062 INFO L225 Difference]: With dead ends: 104 [2023-02-13 22:43:14,062 INFO L226 Difference]: Without dead ends: 102 [2023-02-13 22:43:14,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=473, Invalid=6168, Unknown=1, NotChecked=0, Total=6642 [2023-02-13 22:43:14,063 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:14,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 459 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:43:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-13 22:43:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 72. [2023-02-13 22:43:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 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) [2023-02-13 22:43:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-02-13 22:43:14,076 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 59 [2023-02-13 22:43:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:14,077 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-02-13 22:43:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.3225806451612905) internal successors, (144), 62 states have internal predecessors, (144), 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) [2023-02-13 22:43:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-02-13 22:43:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-13 22:43:14,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:14,077 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:14,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:14,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:14,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1180498710, now seen corresponding path program 13 times [2023-02-13 22:43:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:14,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142311331] [2023-02-13 22:43:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:14,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142311331] [2023-02-13 22:43:14,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142311331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125446762] [2023-02-13 22:43:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:43:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:14,438 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) [2023-02-13 22:43:14,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-13 22:43:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 22:43:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 98 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 98 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:14,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125446762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:14,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:14,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-13 22:43:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790809802] [2023-02-13 22:43:14,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:14,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-13 22:43:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-13 22:43:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-02-13 22:43:14,808 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 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) [2023-02-13 22:43:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:14,885 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2023-02-13 22:43:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 22:43:14,885 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 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 60 [2023-02-13 22:43:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:14,885 INFO L225 Difference]: With dead ends: 108 [2023-02-13 22:43:14,886 INFO L226 Difference]: Without dead ends: 72 [2023-02-13 22:43:14,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-02-13 22:43:14,888 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:14,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-13 22:43:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-13 22:43:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 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) [2023-02-13 22:43:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-02-13 22:43:14,901 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 60 [2023-02-13 22:43:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:14,901 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-02-13 22:43:14,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 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) [2023-02-13 22:43:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-02-13 22:43:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-13 22:43:14,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:14,902 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:14,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-13 22:43:15,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:15,106 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 14 times [2023-02-13 22:43:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:15,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480260004] [2023-02-13 22:43:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:15,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480260004] [2023-02-13 22:43:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480260004] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628443525] [2023-02-13 22:43:15,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:15,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:15,677 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) [2023-02-13 22:43:15,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-13 22:43:15,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:15,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-13 22:43:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:16,120 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:43:16,203 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:16,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:43:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:16,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:16,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-02-13 22:43:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:16,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:17,545 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 26 [2023-02-13 22:43:17,548 INFO L350 Elim1Store]: Elim1 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 88 treesize of output 82 [2023-02-13 22:43:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 78 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:18,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628443525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:18,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:18,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 31] total 86 [2023-02-13 22:43:18,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701896597] [2023-02-13 22:43:18,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-13 22:43:18,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-13 22:43:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=6387, Unknown=0, NotChecked=0, Total=7310 [2023-02-13 22:43:18,361 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 86 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 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) [2023-02-13 22:43:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:20,459 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2023-02-13 22:43:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-13 22:43:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 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 63 [2023-02-13 22:43:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:20,459 INFO L225 Difference]: With dead ends: 142 [2023-02-13 22:43:20,459 INFO L226 Difference]: Without dead ends: 72 [2023-02-13 22:43:20,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4865 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1711, Invalid=13051, Unknown=0, NotChecked=0, Total=14762 [2023-02-13 22:43:20,461 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:20,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 481 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 22:43:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-13 22:43:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-13 22:43:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 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) [2023-02-13 22:43:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-02-13 22:43:20,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2023-02-13 22:43:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:20,482 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-02-13 22:43:20,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 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) [2023-02-13 22:43:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-02-13 22:43:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-13 22:43:20,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:20,482 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:20,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:20,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:20,687 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:20,687 INFO L85 PathProgramCache]: Analyzing trace with hash 331940912, now seen corresponding path program 15 times [2023-02-13 22:43:20,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:20,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221454225] [2023-02-13 22:43:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:20,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221454225] [2023-02-13 22:43:21,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221454225] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613657937] [2023-02-13 22:43:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:43:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:21,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:21,455 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) [2023-02-13 22:43:21,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-13 22:43:21,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-13 22:43:21,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-13 22:43:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:21,743 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:43:21,782 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:21,782 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:43:21,818 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:21,819 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24 [2023-02-13 22:43:22,071 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 2 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:22,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:26,534 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 23 [2023-02-13 22:43:26,536 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 62 [2023-02-13 22:43:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 284 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:43:27,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613657937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:27,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:27,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 71 [2023-02-13 22:43:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264162014] [2023-02-13 22:43:27,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-13 22:43:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-13 22:43:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4705, Unknown=7, NotChecked=0, Total=4970 [2023-02-13 22:43:27,154 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 71 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 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) [2023-02-13 22:43:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:28,147 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2023-02-13 22:43:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-13 22:43:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 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 69 [2023-02-13 22:43:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:28,149 INFO L225 Difference]: With dead ends: 81 [2023-02-13 22:43:28,149 INFO L226 Difference]: Without dead ends: 79 [2023-02-13 22:43:28,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=580, Invalid=7969, Unknown=7, NotChecked=0, Total=8556 [2023-02-13 22:43:28,153 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:28,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 571 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 22:43:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-13 22:43:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2023-02-13 22:43:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2023-02-13 22:43:28,163 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2023-02-13 22:43:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:28,164 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2023-02-13 22:43:28,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 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) [2023-02-13 22:43:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2023-02-13 22:43:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-13 22:43:28,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:28,165 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:28,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:28,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:28,371 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1261252838, now seen corresponding path program 16 times [2023-02-13 22:43:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:28,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803492113] [2023-02-13 22:43:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:28,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803492113] [2023-02-13 22:43:29,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803492113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139023157] [2023-02-13 22:43:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:43:29,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:29,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:29,272 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) [2023-02-13 22:43:29,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-13 22:43:29,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:43:29,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-13 22:43:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:29,688 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-02-13 22:43:29,761 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:29,762 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2023-02-13 22:43:29,811 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:29,812 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2023-02-13 22:43:29,862 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:29,863 INFO L350 Elim1Store]: Elim1 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 [2023-02-13 22:43:29,931 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:29,932 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 27 [2023-02-13 22:43:30,019 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-02-13 22:43:30,019 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 26 [2023-02-13 22:43:30,088 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2023-02-13 22:43:30,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-02-13 22:43:30,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:30,598 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 12 [2023-02-13 22:43:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:30,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:44:51,991 INFO L350 Elim1Store]: Elim1 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 131 treesize of output 127 [2023-02-13 22:44:54,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:44:54,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165841379271 treesize of output 165568749511