./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array8_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:10:50,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:10:50,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:10:50,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:10:50,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:10:50,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:10:50,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:10:50,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:10:51,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:10:51,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:10:51,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:10:51,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:10:51,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:10:51,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:10:51,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:10:51,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:10:51,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:10:51,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:10:51,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:10:51,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:10:51,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:10:51,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:10:51,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:10:51,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:10:51,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:10:51,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:10:51,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:10:51,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:10:51,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:10:51,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:10:51,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:10:51,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:10:51,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:10:51,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:10:51,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:10:51,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:10:51,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:10:51,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:10:51,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:10:51,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:10:51,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:10:51,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:10:51,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:10:51,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:10:51,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:10:51,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:10:51,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:10:51,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:10:51,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:10:51,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:10:51,080 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:10:51,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:10:51,081 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:10:51,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:10:51,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:10:51,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:10:51,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:10:51,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:10:51,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:10:51,082 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:10:51,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:10:51,082 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:10:51,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:10:51,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:10:51,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:10:51,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:10:51,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:10:51,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:10:51,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:10:51,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:10:51,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:10:51,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:10:51,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:10:51,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:10:51,085 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:10:51,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:10:51,085 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:10:51,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2023-02-16 00:10:51,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:10:51,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:10:51,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:10:51,370 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:10:51,371 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:10:51,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-16 00:10:52,625 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:10:52,833 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:10:52,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-16 00:10:52,841 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6001df269/ad6f710ea540436d94c421601e19f2d3/FLAG61f11dd0b [2023-02-16 00:10:52,857 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6001df269/ad6f710ea540436d94c421601e19f2d3 [2023-02-16 00:10:52,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:10:52,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:10:52,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:10:52,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:10:52,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:10:52,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:10:52" (1/1) ... [2023-02-16 00:10:52,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5064dd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:52, skipping insertion in model container [2023-02-16 00:10:52,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:10:52" (1/1) ... [2023-02-16 00:10:52,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:10:52,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:10:53,025 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2023-02-16 00:10:53,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:10:53,059 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:10:53,072 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2023-02-16 00:10:53,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:10:53,104 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:10:53,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53 WrapperNode [2023-02-16 00:10:53,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:10:53,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:10:53,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:10:53,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:10:53,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,149 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-16 00:10:53,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:10:53,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:10:53,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:10:53,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:10:53,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:10:53,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:10:53,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:10:53,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:10:53,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (1/1) ... [2023-02-16 00:10:53,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:10:53,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:10:53,227 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) [2023-02-16 00:10:53,249 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 [2023-02-16 00:10:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:10:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-16 00:10:53,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-16 00:10:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:10:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 00:10:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:10:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:10:53,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:10:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:10:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:10:53,338 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:10:53,340 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:10:53,531 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:10:53,535 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:10:53,548 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 00:10:53,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:10:53 BoogieIcfgContainer [2023-02-16 00:10:53,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:10:53,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:10:53,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:10:53,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:10:53,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:10:52" (1/3) ... [2023-02-16 00:10:53,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e6a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:10:53, skipping insertion in model container [2023-02-16 00:10:53,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:10:53" (2/3) ... [2023-02-16 00:10:53,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e6a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:10:53, skipping insertion in model container [2023-02-16 00:10:53,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:10:53" (3/3) ... [2023-02-16 00:10:53,558 INFO L112 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2023-02-16 00:10:53,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:10:53,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:10:53,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:10:53,661 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;@5328cdbd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:10:53,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:10:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:53,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:10:53,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:10:53,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:10:53,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:10:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:10:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2023-02-16 00:10:53,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:10:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951119089] [2023-02-16 00:10:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:10:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:10:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:10:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:10:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:10:53,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:10:53,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951119089] [2023-02-16 00:10:53,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951119089] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:10:53,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:10:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:10:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581660376] [2023-02-16 00:10:53,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:10:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:10:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:10:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:10:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:10:53,949 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:10:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:10:53,972 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-02-16 00:10:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:10:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-16 00:10:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:10:53,980 INFO L225 Difference]: With dead ends: 53 [2023-02-16 00:10:53,980 INFO L226 Difference]: Without dead ends: 24 [2023-02-16 00:10:53,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:10:53,987 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-02-16 00:10:53,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:10:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-16 00:10:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-16 00:10:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-16 00:10:54,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-02-16 00:10:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:10:54,023 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-16 00:10:54,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:10:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-16 00:10:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 00:10:54,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:10:54,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:10:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:10:54,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:10:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:10:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2023-02-16 00:10:54,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:10:54,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419881105] [2023-02-16 00:10:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:54,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:10:54,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:10:54,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44788841] [2023-02-16 00:10:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:54,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:54,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:10:54,073 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) [2023-02-16 00:10:54,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:10:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:10:54,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 00:10:54,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:10:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:10:54,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:10:54,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:10:54,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419881105] [2023-02-16 00:10:54,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:10:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44788841] [2023-02-16 00:10:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44788841] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:10:54,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:10:54,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:10:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242571436] [2023-02-16 00:10:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:10:54,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:10:54,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:10:54,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:10:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:10:54,306 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:10:54,425 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-16 00:10:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:10:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-16 00:10:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:10:54,428 INFO L225 Difference]: With dead ends: 50 [2023-02-16 00:10:54,428 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 00:10:54,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:10:54,430 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:10:54,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:10:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 00:10:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-16 00:10:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-02-16 00:10:54,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-02-16 00:10:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:10:54,438 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-02-16 00:10:54,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-02-16 00:10:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 00:10:54,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:10:54,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:10:54,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:10:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:54,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:10:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:10:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2023-02-16 00:10:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:10:54,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118932821] [2023-02-16 00:10:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:10:54,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:10:54,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515895383] [2023-02-16 00:10:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:54,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:10:54,682 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) [2023-02-16 00:10:54,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:10:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:10:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 00:10:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:10:54,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:10:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:54,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-16 00:10:54,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:10:55,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-16 00:10:55,491 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:10:55,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-02-16 00:10:55,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:10:55,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2023-02-16 00:10:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:10:55,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:10:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:10:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118932821] [2023-02-16 00:10:56,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:10:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515895383] [2023-02-16 00:10:56,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515895383] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:10:56,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 00:10:56,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-16 00:10:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026078944] [2023-02-16 00:10:56,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 00:10:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 00:10:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:10:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 00:10:56,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-02-16 00:10:56,019 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:10:56,610 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-02-16 00:10:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 00:10:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-02-16 00:10:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:10:56,612 INFO L225 Difference]: With dead ends: 77 [2023-02-16 00:10:56,612 INFO L226 Difference]: Without dead ends: 57 [2023-02-16 00:10:56,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 00:10:56,614 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 00:10:56,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 181 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 00:10:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-16 00:10:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2023-02-16 00:10:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 00:10:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-16 00:10:56,624 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2023-02-16 00:10:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:10:56,625 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-16 00:10:56,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-16 00:10:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 00:10:56,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:10:56,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:10:56,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 00:10:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-16 00:10:56,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:10:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:10:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2023-02-16 00:10:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:10:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363348905] [2023-02-16 00:10:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:10:56,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:10:56,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247757371] [2023-02-16 00:10:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:10:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:10:56,862 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) [2023-02-16 00:10:56,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:10:56,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:10:56,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:10:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:10:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:10:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:10:56,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:10:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:10:57,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:10:57,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363348905] [2023-02-16 00:10:57,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:10:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247757371] [2023-02-16 00:10:57,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247757371] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:10:57,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:10:57,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 00:10:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972163906] [2023-02-16 00:10:57,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:10:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 00:10:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:10:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 00:10:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:10:57,052 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:10:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:10:57,158 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-02-16 00:10:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:10:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-16 00:10:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:10:57,160 INFO L225 Difference]: With dead ends: 61 [2023-02-16 00:10:57,160 INFO L226 Difference]: Without dead ends: 40 [2023-02-16 00:10:57,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:10:57,161 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:10:57,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 87 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:10:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-16 00:10:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-16 00:10:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-16 00:10:57,167 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 31 [2023-02-16 00:10:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:10:57,168 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-16 00:10:57,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:10:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-16 00:10:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 00:10:57,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:10:57,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:10:57,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 00:10:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:57,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:10:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:10:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2023-02-16 00:10:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:10:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365734617] [2023-02-16 00:10:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:57,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:10:57,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:10:57,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871299777] [2023-02-16 00:10:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:10:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:10:57,407 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) [2023-02-16 00:10:57,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 00:10:57,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 00:10:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:10:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:10:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:10:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:10:57,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:10:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:10:57,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:10:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365734617] [2023-02-16 00:10:57,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:10:57,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871299777] [2023-02-16 00:10:57,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871299777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:10:57,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:10:57,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 00:10:57,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852714302] [2023-02-16 00:10:57,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:10:57,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 00:10:57,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:10:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 00:10:57,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:10:57,580 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:10:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:10:57,682 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-16 00:10:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 00:10:57,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-16 00:10:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:10:57,685 INFO L225 Difference]: With dead ends: 39 [2023-02-16 00:10:57,686 INFO L226 Difference]: Without dead ends: 35 [2023-02-16 00:10:57,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-16 00:10:57,690 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:10:57,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:10:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-16 00:10:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-16 00:10:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:10:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-02-16 00:10:57,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2023-02-16 00:10:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:10:57,703 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-02-16 00:10:57,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:10:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-02-16 00:10:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 00:10:57,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:10:57,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:10:57,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 00:10:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:57,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:10:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:10:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2023-02-16 00:10:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:10:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348324027] [2023-02-16 00:10:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:10:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:10:57,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:10:57,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650383581] [2023-02-16 00:10:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 00:10:57,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:10:57,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:10:57,946 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) [2023-02-16 00:10:57,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 00:10:58,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 00:10:58,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:10:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-16 00:10:58,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:10:58,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:10:58,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:58,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-02-16 00:10:58,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:10:58,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-16 00:10:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:58,677 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-16 00:10:58,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2023-02-16 00:10:58,855 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:10:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:58,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2023-02-16 00:10:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:59,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:10:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:10:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:10:59,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 20 [2023-02-16 00:10:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:10:59,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348324027] [2023-02-16 00:11:02,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650383581] [2023-02-16 00:11:02,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650383581] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:11:02,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 00:11:02,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-16 00:11:02,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131472860] [2023-02-16 00:11:02,524 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:02,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 00:11:02,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 00:11:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1175, Unknown=1, NotChecked=0, Total=1406 [2023-02-16 00:11:02,526 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:03,839 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2023-02-16 00:11:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 00:11:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-02-16 00:11:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:03,841 INFO L225 Difference]: With dead ends: 76 [2023-02-16 00:11:03,841 INFO L226 Difference]: Without dead ends: 72 [2023-02-16 00:11:03,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=478, Invalid=2173, Unknown=1, NotChecked=0, Total=2652 [2023-02-16 00:11:03,843 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:03,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 240 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 00:11:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-16 00:11:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2023-02-16 00:11:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 00:11:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-02-16 00:11:03,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 33 [2023-02-16 00:11:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:03,852 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-02-16 00:11:03,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-02-16 00:11:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 00:11:03,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:03,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:04,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:04,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2023-02-16 00:11:04,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:04,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116582730] [2023-02-16 00:11:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:04,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:04,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:04,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582145422] [2023-02-16 00:11:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:04,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:04,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:04,102 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) [2023-02-16 00:11:04,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 00:11:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:11:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-16 00:11:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:04,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:11:04,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-16 00:11:04,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-16 00:11:04,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:11:04,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:11:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2023-02-16 00:11:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,776 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2023-02-16 00:11:04,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2023-02-16 00:11:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:04,978 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2023-02-16 00:11:04,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 96 [2023-02-16 00:11:05,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:11:05,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 122 [2023-02-16 00:11:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:11:05,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:08,547 WARN L837 $PredicateComparison]: unable to prove that (forall ((|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (v_ArrVal_251 Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int) (v_ArrVal_249 Int)) (or (< (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|) v_ArrVal_251) (not (<= v_ArrVal_249 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))) (not (< (+ |aux_mod_ULTIMATE.start_main_~index~0#1_40| (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|)) c_~ARR_SIZE~0)) (= 0 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (> 0 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (not (<= 0 (+ |aux_mod_ULTIMATE.start_main_~index~0#1_40| (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 2)))) (< (let ((.cse3 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse4 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 .cse4) v_ArrVal_249)))) (let ((.cse0 (store (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse3 .cse4 |c_ULTIMATE.start_main_~#array2~0#1.offset|) v_ArrVal_251))) (let ((.cse1 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (* 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4))) (* 2 (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|)) (* 2 (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4))) (* 2 |c_ULTIMATE.start_main_~sum~0#1|) (* 2 (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))) (+ c_~ARR_SIZE~0 2)) (>= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 2))) is different from false [2023-02-16 00:11:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116582730] [2023-02-16 00:11:08,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:08,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582145422] [2023-02-16 00:11:08,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582145422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:11:08,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 00:11:08,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-16 00:11:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026401463] [2023-02-16 00:11:08,552 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:08,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 00:11:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 00:11:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=784, Unknown=1, NotChecked=58, Total=992 [2023-02-16 00:11:08,554 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:11,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:11,778 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2023-02-16 00:11:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 00:11:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-02-16 00:11:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:11,780 INFO L225 Difference]: With dead ends: 84 [2023-02-16 00:11:11,780 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 00:11:11,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=266, Invalid=1458, Unknown=2, NotChecked=80, Total=1806 [2023-02-16 00:11:11,781 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:11,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 159 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 00:11:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 00:11:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2023-02-16 00:11:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 00:11:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2023-02-16 00:11:11,794 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 33 [2023-02-16 00:11:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:11,794 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2023-02-16 00:11:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2023-02-16 00:11:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 00:11:11,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:11,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:11,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:12,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:12,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1879614779, now seen corresponding path program 5 times [2023-02-16 00:11:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:12,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475314349] [2023-02-16 00:11:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:12,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524956316] [2023-02-16 00:11:12,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 00:11:12,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:12,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:12,060 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) [2023-02-16 00:11:12,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 00:11:12,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 00:11:12,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:11:12,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:11:12,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:11:12,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:11:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475314349] [2023-02-16 00:11:12,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:12,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524956316] [2023-02-16 00:11:12,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524956316] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:11:12,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:11:12,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-16 00:11:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763987393] [2023-02-16 00:11:12,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:12,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 00:11:12,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 00:11:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:11:12,250 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:11:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:12,390 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2023-02-16 00:11:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 00:11:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-02-16 00:11:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:12,392 INFO L225 Difference]: With dead ends: 113 [2023-02-16 00:11:12,392 INFO L226 Difference]: Without dead ends: 101 [2023-02-16 00:11:12,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-16 00:11:12,393 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:12,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 105 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:11:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-16 00:11:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2023-02-16 00:11:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 00:11:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-02-16 00:11:12,408 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 35 [2023-02-16 00:11:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:12,409 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-02-16 00:11:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:11:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-02-16 00:11:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 00:11:12,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:12,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:12,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:12,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:12,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1373135831, now seen corresponding path program 6 times [2023-02-16 00:11:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:12,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139895009] [2023-02-16 00:11:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:12,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:12,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661188222] [2023-02-16 00:11:12,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 00:11:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:12,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:11:12,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 00:11:12,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 00:11:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:11:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:11:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:11:12,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:11:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139895009] [2023-02-16 00:11:12,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661188222] [2023-02-16 00:11:12,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661188222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:11:12,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:11:12,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-16 00:11:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914240236] [2023-02-16 00:11:12,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 00:11:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 00:11:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:11:12,865 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:11:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:13,030 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2023-02-16 00:11:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 00:11:13,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-02-16 00:11:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:13,032 INFO L225 Difference]: With dead ends: 100 [2023-02-16 00:11:13,032 INFO L226 Difference]: Without dead ends: 96 [2023-02-16 00:11:13,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-16 00:11:13,033 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:13,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 126 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:11:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-16 00:11:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2023-02-16 00:11:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 00:11:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-02-16 00:11:13,047 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 35 [2023-02-16 00:11:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:13,047 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-02-16 00:11:13,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:11:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-02-16 00:11:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 00:11:13,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:13,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:13,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-16 00:11:13,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 7 times [2023-02-16 00:11:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249369477] [2023-02-16 00:11:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:13,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:13,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096254145] [2023-02-16 00:11:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 00:11:13,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:13,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:13,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:11:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 00:11:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:11:13,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-16 00:11:13,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:13,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:11:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-16 00:11:13,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:11:13,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-16 00:11:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2023-02-16 00:11:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:13,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2023-02-16 00:11:14,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,059 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-16 00:11:14,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2023-02-16 00:11:14,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:14,309 INFO L321 Elim1Store]: treesize reduction 76, result has 49.3 percent of original size [2023-02-16 00:11:14,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 163 [2023-02-16 00:11:15,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2023-02-16 00:11:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:11:15,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:15,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249369477] [2023-02-16 00:11:15,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096254145] [2023-02-16 00:11:15,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096254145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:11:15,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 00:11:15,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-16 00:11:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752597601] [2023-02-16 00:11:15,984 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 00:11:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 00:11:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 00:11:15,985 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:16,905 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2023-02-16 00:11:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 00:11:16,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-16 00:11:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:16,907 INFO L225 Difference]: With dead ends: 102 [2023-02-16 00:11:16,907 INFO L226 Difference]: Without dead ends: 98 [2023-02-16 00:11:16,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 00:11:16,908 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:16,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 237 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 00:11:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-16 00:11:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2023-02-16 00:11:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 00:11:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-02-16 00:11:16,926 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 37 [2023-02-16 00:11:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:16,926 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-02-16 00:11:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-02-16 00:11:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 00:11:16,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:16,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:16,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:17,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 00:11:17,134 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 2 times [2023-02-16 00:11:17,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:17,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082126205] [2023-02-16 00:11:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:17,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:17,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621953953] [2023-02-16 00:11:17,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:11:17,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:17,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:17,182 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:11:17,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 00:11:17,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:11:17,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:11:17,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-16 00:11:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:17,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:11:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:17,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-16 00:11:17,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-16 00:11:17,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:11:17,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:11:17,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2023-02-16 00:11:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:17,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2023-02-16 00:11:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,060 INFO L321 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2023-02-16 00:11:18,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2023-02-16 00:11:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:18,319 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2023-02-16 00:11:18,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 120 [2023-02-16 00:11:20,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:11:20,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 151 treesize of output 247 [2023-02-16 00:11:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:11:21,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:27,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:27,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082126205] [2023-02-16 00:11:27,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:27,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621953953] [2023-02-16 00:11:27,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621953953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:11:27,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 00:11:27,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-16 00:11:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009962663] [2023-02-16 00:11:27,549 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:27,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 00:11:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 00:11:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1459, Unknown=2, NotChecked=0, Total=1722 [2023-02-16 00:11:27,550 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:30,335 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2023-02-16 00:11:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-16 00:11:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-16 00:11:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:30,336 INFO L225 Difference]: With dead ends: 137 [2023-02-16 00:11:30,337 INFO L226 Difference]: Without dead ends: 133 [2023-02-16 00:11:30,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=723, Invalid=3831, Unknown=2, NotChecked=0, Total=4556 [2023-02-16 00:11:30,338 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:30,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 298 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 00:11:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-16 00:11:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 88. [2023-02-16 00:11:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-16 00:11:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-02-16 00:11:30,356 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 37 [2023-02-16 00:11:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:30,356 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-02-16 00:11:30,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 00:11:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-02-16 00:11:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 00:11:30,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:30,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:30,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 00:11:30,564 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 8 times [2023-02-16 00:11:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:30,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613395184] [2023-02-16 00:11:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:30,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:30,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038850809] [2023-02-16 00:11:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:11:30,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:30,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:11:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 00:11:30,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:11:30,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:11:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 00:11:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:11:30,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:11:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:11:30,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:11:30,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613395184] [2023-02-16 00:11:30,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:11:30,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038850809] [2023-02-16 00:11:30,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038850809] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:11:30,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:11:30,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-16 00:11:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028654373] [2023-02-16 00:11:30,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:11:30,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 00:11:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:11:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 00:11:30,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-16 00:11:30,836 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:11:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:11:31,033 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2023-02-16 00:11:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 00:11:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-16 00:11:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:11:31,034 INFO L225 Difference]: With dead ends: 154 [2023-02-16 00:11:31,034 INFO L226 Difference]: Without dead ends: 140 [2023-02-16 00:11:31,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-16 00:11:31,035 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:11:31,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 126 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:11:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-16 00:11:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2023-02-16 00:11:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 00:11:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2023-02-16 00:11:31,052 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 39 [2023-02-16 00:11:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:11:31,053 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2023-02-16 00:11:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 00:11:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2023-02-16 00:11:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 00:11:31,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:11:31,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:11:31,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 00:11:31,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 00:11:31,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:11:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:11:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 9 times [2023-02-16 00:11:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:11:31,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190846022] [2023-02-16 00:11:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:11:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:11:31,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:11:31,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274261081] [2023-02-16 00:11:31,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:11:31,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:11:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:11:31,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:11:31,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 00:11:31,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-16 00:11:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:11:31,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-16 00:11:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:11:31,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:11:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-16 00:11:31,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-16 00:11:31,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-16 00:11:31,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2023-02-16 00:11:31,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,587 INFO L321 Elim1Store]: treesize reduction 66, result has 43.6 percent of original size [2023-02-16 00:11:31,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 85 [2023-02-16 00:11:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 75 [2023-02-16 00:11:31,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-02-16 00:11:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,753 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2023-02-16 00:11:31,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2023-02-16 00:11:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:31,797 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2023-02-16 00:11:31,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2023-02-16 00:11:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:32,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:33,069 INFO L321 Elim1Store]: treesize reduction 113, result has 49.3 percent of original size [2023-02-16 00:11:33,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 207 [2023-02-16 00:11:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:36,261 INFO L321 Elim1Store]: treesize reduction 930, result has 5.5 percent of original size [2023-02-16 00:11:36,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 63 case distinctions, treesize of input 419 treesize of output 375 [2023-02-16 00:11:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:11:40,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:11:40,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 7 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 88 case distinctions, treesize of input 351 treesize of output 1408