./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/loop-crafted/simple_array_index_value_2.i -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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:03:05,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:03:05,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:03:05,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:03:05,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:03:05,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:03:05,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:03:05,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:03:05,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:03:05,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:03:05,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:03:05,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:03:05,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:03:05,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:03:05,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:03:05,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:03:05,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:03:05,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:03:05,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:03:05,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:03:05,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:03:05,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:03:05,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:03:05,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:03:05,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:03:05,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:03:05,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:03:05,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:03:05,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:03:05,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:03:05,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:03:05,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:03:05,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:03:05,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:03:05,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:03:05,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:03:05,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:03:05,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:03:05,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:03:05,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:03:05,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:03:05,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:03:05,989 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:03:05,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:03:05,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:03:05,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:03:05,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:03:05,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:03:05,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:03:05,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:03:05,991 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:03:05,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:03:05,992 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:03:05,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:03:05,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:03:05,994 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:03:05,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:03:05,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:03:05,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:03:05,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:03:05,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:03:05,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:03:05,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:03:05,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:03:05,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:03:05,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:03:05,996 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:03:05,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:03:05,996 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:03:05,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:03:05,996 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:03:05,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 [2023-02-15 20:03:06,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:03:06,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:03:06,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:03:06,170 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:03:06,170 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:03:06,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2023-02-15 20:03:07,150 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:03:07,290 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:03:07,291 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2023-02-15 20:03:07,296 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57ad1741d/b38c574c3663422782452a7b51bd871e/FLAGebb52c7c5 [2023-02-15 20:03:07,307 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57ad1741d/b38c574c3663422782452a7b51bd871e [2023-02-15 20:03:07,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:03:07,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:03:07,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:03:07,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:03:07,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:03:07,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e58c996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07, skipping insertion in model container [2023-02-15 20:03:07,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:03:07,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:03:07,417 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/loop-crafted/simple_array_index_value_2.i[919,932] [2023-02-15 20:03:07,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:03:07,430 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:03:07,437 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/loop-crafted/simple_array_index_value_2.i[919,932] [2023-02-15 20:03:07,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:03:07,448 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:03:07,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07 WrapperNode [2023-02-15 20:03:07,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:03:07,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:03:07,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:03:07,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:03:07,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,468 INFO L138 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2023-02-15 20:03:07,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:03:07,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:03:07,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:03:07,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:03:07,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,480 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:03:07,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:03:07,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:03:07,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:03:07,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (1/1) ... [2023-02-15 20:03:07,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:03:07,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:07,502 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) [2023-02-15 20:03:07,508 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 [2023-02-15 20:03:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:03:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:03:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 20:03:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 20:03:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:03:07,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:03:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 20:03:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 20:03:07,570 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:03:07,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:03:07,706 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:03:07,710 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:03:07,710 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 20:03:07,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:03:07 BoogieIcfgContainer [2023-02-15 20:03:07,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:03:07,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:03:07,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:03:07,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:03:07,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:03:07" (1/3) ... [2023-02-15 20:03:07,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2a9bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:03:07, skipping insertion in model container [2023-02-15 20:03:07,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:03:07" (2/3) ... [2023-02-15 20:03:07,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2a9bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:03:07, skipping insertion in model container [2023-02-15 20:03:07,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:03:07" (3/3) ... [2023-02-15 20:03:07,732 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2023-02-15 20:03:07,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:03:07,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:03:07,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:03:07,805 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;@390e8f7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:03:07,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:03:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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) [2023-02-15 20:03:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 20:03:07,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:07,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:07,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1820178652, now seen corresponding path program 1 times [2023-02-15 20:03:07,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:07,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58952104] [2023-02-15 20:03:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:07,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:03:07,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:07,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58952104] [2023-02-15 20:03:07,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58952104] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:03:07,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:03:07,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:03:07,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107400180] [2023-02-15 20:03:07,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:03:07,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:03:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:03:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:03:07,931 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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) [2023-02-15 20:03:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:07,944 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-02-15 20:03:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:03:07,946 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 [2023-02-15 20:03:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:07,951 INFO L225 Difference]: With dead ends: 32 [2023-02-15 20:03:07,951 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 20:03:07,953 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 [2023-02-15 20:03:07,961 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 [2023-02-15 20:03:07,961 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] [2023-02-15 20:03:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 20:03:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 20:03:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2023-02-15 20:03:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-15 20:03:07,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2023-02-15 20:03:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:07,980 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-15 20:03:07,980 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) [2023-02-15 20:03:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-15 20:03:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 20:03:07,981 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:07,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:03:07,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1808172879, now seen corresponding path program 1 times [2023-02-15 20:03:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:07,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590950607] [2023-02-15 20:03:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:03:08,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:08,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590950607] [2023-02-15 20:03:08,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590950607] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:03:08,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:03:08,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:03:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627786351] [2023-02-15 20:03:08,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:03:08,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:03:08,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:03:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:03:08,085 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) [2023-02-15 20:03:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:08,111 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-15 20:03:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:03:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 [2023-02-15 20:03:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:08,112 INFO L225 Difference]: With dead ends: 30 [2023-02-15 20:03:08,112 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 20:03:08,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:03:08,113 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:08,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:03:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 20:03:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2023-02-15 20:03:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2023-02-15 20:03:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-15 20:03:08,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2023-02-15 20:03:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:08,120 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-15 20:03:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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) [2023-02-15 20:03:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-15 20:03:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 20:03:08,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:08,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:08,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 20:03:08,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1968450312, now seen corresponding path program 1 times [2023-02-15 20:03:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:08,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719376590] [2023-02-15 20:03:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:03:08,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719376590] [2023-02-15 20:03:08,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719376590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268241951] [2023-02-15 20:03:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:08,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:08,291 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) [2023-02-15 20:03:08,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:03:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:08,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:03:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:08,549 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 [2023-02-15 20:03:08,636 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 46 treesize of output 30 [2023-02-15 20:03:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:03:08,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:08,759 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 45 treesize of output 41 [2023-02-15 20:03:08,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:08,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2023-02-15 20:03:08,833 INFO L321 Elim1Store]: treesize reduction 23, result has 39.5 percent of original size [2023-02-15 20:03:08,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 56 [2023-02-15 20:03:08,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:08,857 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 26 treesize of output 26 [2023-02-15 20:03:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:03:08,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268241951] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:08,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:08,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 14 [2023-02-15 20:03:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889947135] [2023-02-15 20:03:08,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:03:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:03:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:03:08,962 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2023-02-15 20:03:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:09,136 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-02-15 20:03:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:03:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 20:03:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:09,138 INFO L225 Difference]: With dead ends: 40 [2023-02-15 20:03:09,138 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 20:03:09,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-02-15 20:03:09,140 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:09,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 50 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:03:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 20:03:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2023-02-15 20:03:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:03:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-15 20:03:09,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2023-02-15 20:03:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:09,150 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-15 20:03:09,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2023-02-15 20:03:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-15 20:03:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 20:03:09,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:09,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:09,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:09,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash -209237439, now seen corresponding path program 2 times [2023-02-15 20:03:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:09,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004119615] [2023-02-15 20:03:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:03:09,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:09,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004119615] [2023-02-15 20:03:09,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004119615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:09,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890902267] [2023-02-15 20:03:09,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:03:09,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:09,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:09,515 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) [2023-02-15 20:03:09,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:03:09,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:03:09,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:03:09,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 20:03:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:09,689 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 [2023-02-15 20:03:09,795 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-02-15 20:03:09,796 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 39 treesize of output 42 [2023-02-15 20:03:09,877 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 46 treesize of output 30 [2023-02-15 20:03:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:09,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:10,071 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 45 treesize of output 41 [2023-02-15 20:03:10,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:10,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2023-02-15 20:03:10,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:10,109 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 80 treesize of output 63 [2023-02-15 20:03:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:10,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890902267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:10,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:10,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 19 [2023-02-15 20:03:10,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223758346] [2023-02-15 20:03:10,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:10,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 20:03:10,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:10,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 20:03:10,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-02-15 20:03:10,203 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:03:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:10,830 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-02-15 20:03:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:03:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 20:03:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:10,831 INFO L225 Difference]: With dead ends: 54 [2023-02-15 20:03:10,831 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 20:03:10,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1186, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 20:03:10,832 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 102 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:10,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 52 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:03:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 20:03:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2023-02-15 20:03:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2023-02-15 20:03:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-02-15 20:03:10,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2023-02-15 20:03:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:10,837 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-02-15 20:03:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:03:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-02-15 20:03:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:03:10,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:10,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:10,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 20:03:11,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash -549955312, now seen corresponding path program 1 times [2023-02-15 20:03:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:11,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571036198] [2023-02-15 20:03:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:11,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571036198] [2023-02-15 20:03:11,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571036198] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93894565] [2023-02-15 20:03:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:11,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:11,165 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) [2023-02-15 20:03:11,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:03:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 20:03:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:11,322 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 0 case distinctions, treesize of input 58 treesize of output 53 [2023-02-15 20:03:11,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2023-02-15 20:03:11,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 60 treesize of output 11 [2023-02-15 20:03:11,560 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 0 case distinctions, treesize of input 59 treesize of output 35 [2023-02-15 20:03:11,862 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-02-15 20:03:11,862 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 67 treesize of output 38 [2023-02-15 20:03:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:11,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:12,200 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 45 treesize of output 41 [2023-02-15 20:03:12,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:12,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2023-02-15 20:03:12,235 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2023-02-15 20:03:12,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 50 [2023-02-15 20:03:12,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:12,249 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 22 treesize of output 22 [2023-02-15 20:03:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:12,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93894565] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:12,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:12,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 14] total 27 [2023-02-15 20:03:12,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123033257] [2023-02-15 20:03:12,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:12,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:03:12,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:03:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:03:12,445 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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) [2023-02-15 20:03:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:13,660 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-02-15 20:03:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:03:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:03:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:13,661 INFO L225 Difference]: With dead ends: 58 [2023-02-15 20:03:13,661 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 20:03:13,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=354, Invalid=1808, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:03:13,662 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:13,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 84 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:03:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 20:03:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2023-02-15 20:03:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2023-02-15 20:03:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-15 20:03:13,668 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2023-02-15 20:03:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:13,668 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-15 20:03:13,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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) [2023-02-15 20:03:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-15 20:03:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:03:13,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:13,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:13,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:13,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1289871521, now seen corresponding path program 2 times [2023-02-15 20:03:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614633147] [2023-02-15 20:03:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:13,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 20:03:13,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614633147] [2023-02-15 20:03:13,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614633147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288447782] [2023-02-15 20:03:13,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:03:13,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:13,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:13,969 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) [2023-02-15 20:03:13,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:03:14,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:03:14,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:03:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 20:03:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:14,096 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 0 case distinctions, treesize of input 58 treesize of output 53 [2023-02-15 20:03:14,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2023-02-15 20:03:15,277 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 0 case distinctions, treesize of input 59 treesize of output 35 [2023-02-15 20:03:15,570 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-02-15 20:03:15,571 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 67 treesize of output 38 [2023-02-15 20:03:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:15,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:16,464 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 45 treesize of output 41 [2023-02-15 20:03:16,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:16,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2023-02-15 20:03:16,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 20:03:16,495 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 67 treesize of output 63 [2023-02-15 20:03:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:03:16,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288447782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:16,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:16,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 28 [2023-02-15 20:03:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983682965] [2023-02-15 20:03:16,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:03:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:03:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=646, Unknown=1, NotChecked=0, Total=756 [2023-02-15 20:03:16,679 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 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) [2023-02-15 20:03:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:27,525 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2023-02-15 20:03:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:03:27,525 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 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) Word has length 31 [2023-02-15 20:03:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:27,526 INFO L225 Difference]: With dead ends: 70 [2023-02-15 20:03:27,526 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 20:03:27,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=368, Invalid=1983, Unknown=1, NotChecked=0, Total=2352 [2023-02-15 20:03:27,527 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 30 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:27,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 168 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 374 Invalid, 5 Unknown, 0 Unchecked, 3.2s Time] [2023-02-15 20:03:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 20:03:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2023-02-15 20:03:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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) [2023-02-15 20:03:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-02-15 20:03:27,533 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2023-02-15 20:03:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:27,534 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-02-15 20:03:27,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 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) [2023-02-15 20:03:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-02-15 20:03:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:03:27,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:27,534 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:27,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:27,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash -731259602, now seen corresponding path program 3 times [2023-02-15 20:03:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:27,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949065795] [2023-02-15 20:03:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:03:27,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:27,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949065795] [2023-02-15 20:03:27,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949065795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:27,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839339671] [2023-02-15 20:03:27,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:03:27,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:27,913 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) [2023-02-15 20:03:27,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:03:28,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 20:03:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:03:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 20:03:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:03:28,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:03:28,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839339671] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:28,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:28,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12] total 19 [2023-02-15 20:03:28,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683503573] [2023-02-15 20:03:28,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:28,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 20:03:28,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 20:03:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-02-15 20:03:28,462 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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) [2023-02-15 20:03:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:29,044 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2023-02-15 20:03:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:03:29,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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) Word has length 39 [2023-02-15 20:03:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:29,045 INFO L225 Difference]: With dead ends: 136 [2023-02-15 20:03:29,045 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 20:03:29,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:03:29,046 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:29,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 260 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:03:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 20:03:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 68. [2023-02-15 20:03:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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) [2023-02-15 20:03:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-02-15 20:03:29,060 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 39 [2023-02-15 20:03:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:29,060 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-02-15 20:03:29,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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) [2023-02-15 20:03:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-02-15 20:03:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 20:03:29,062 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:29,062 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:29,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:03:29,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:29,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash 756890813, now seen corresponding path program 4 times [2023-02-15 20:03:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:29,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161242200] [2023-02-15 20:03:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:03:29,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:29,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161242200] [2023-02-15 20:03:29,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161242200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:29,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964742542] [2023-02-15 20:03:29,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:03:29,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:29,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:29,673 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) [2023-02-15 20:03:29,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:03:29,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:03:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:03:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 20:03:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:03:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:03:30,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:03:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:03:30,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964742542] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:03:30,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:03:30,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-02-15 20:03:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142129106] [2023-02-15 20:03:30,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:03:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 20:03:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:03:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 20:03:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:03:30,496 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 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) [2023-02-15 20:03:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:03:39,747 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2023-02-15 20:03:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:03:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 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 67 [2023-02-15 20:03:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:03:39,748 INFO L225 Difference]: With dead ends: 276 [2023-02-15 20:03:39,748 INFO L226 Difference]: Without dead ends: 259 [2023-02-15 20:03:39,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=597, Invalid=1042, Unknown=1, NotChecked=0, Total=1640 [2023-02-15 20:03:39,749 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 613 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:03:39,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 856 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 20:03:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-15 20:03:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 124. [2023-02-15 20:03:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 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) [2023-02-15 20:03:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-02-15 20:03:39,765 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 67 [2023-02-15 20:03:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:03:39,765 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-02-15 20:03:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 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) [2023-02-15 20:03:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-02-15 20:03:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 20:03:39,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:03:39,767 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 20:03:39,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 20:03:39,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:39,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:03:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:03:39,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1787287973, now seen corresponding path program 5 times [2023-02-15 20:03:39,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:03:39,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631730458] [2023-02-15 20:03:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:03:39,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:03:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:03:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:03:41,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:03:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631730458] [2023-02-15 20:03:41,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631730458] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:03:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920110445] [2023-02-15 20:03:41,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:03:41,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:03:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:03:41,118 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) [2023-02-15 20:03:41,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process