./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_tiling_poly6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_tiling_poly6.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 bc54b91753b0936ef1baa83056e278277d8c6508 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 18:43:51,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 18:43:51,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 18:43:52,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 18:43:52,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 18:43:52,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 18:43:52,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 18:43:52,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 18:43:52,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 18:43:52,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 18:43:52,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 18:43:52,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 18:43:52,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 18:43:52,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 18:43:52,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 18:43:52,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 18:43:52,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 18:43:52,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 18:43:52,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 18:43:52,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 18:43:52,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 18:43:52,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 18:43:52,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 18:43:52,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 18:43:52,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 18:43:52,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 18:43:52,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 18:43:52,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 18:43:52,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 18:43:52,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 18:43:52,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 18:43:52,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 18:43:52,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 18:43:52,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 18:43:52,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 18:43:52,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 18:43:52,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 18:43:52,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 18:43:52,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 18:43:52,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 18:43:52,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 18:43:52,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 18:43:52,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 18:43:52,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 18:43:52,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 18:43:52,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 18:43:52,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 18:43:52,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 18:43:52,089 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 18:43:52,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 18:43:52,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 18:43:52,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 18:43:52,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 18:43:52,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 18:43:52,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 18:43:52,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 18:43:52,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 18:43:52,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 18:43:52,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 18:43:52,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 18:43:52,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 18:43:52,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 18:43:52,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 18:43:52,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 18:43:52,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 18:43:52,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 18:43:52,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 18:43:52,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 18:43:52,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 18:43:52,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 18:43:52,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 18:43:52,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 18:43:52,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc54b91753b0936ef1baa83056e278277d8c6508 [2021-08-25 18:43:52,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 18:43:52,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 18:43:52,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 18:43:52,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 18:43:52,393 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 18:43:52,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tiling_poly6.c [2021-08-25 18:43:52,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92a98125/5fabe750302746cb9f9f4261042a0f0d/FLAG511c28119 [2021-08-25 18:43:52,869 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 18:43:52,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_poly6.c [2021-08-25 18:43:52,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92a98125/5fabe750302746cb9f9f4261042a0f0d/FLAG511c28119 [2021-08-25 18:43:53,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92a98125/5fabe750302746cb9f9f4261042a0f0d [2021-08-25 18:43:53,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 18:43:53,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 18:43:53,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 18:43:53,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 18:43:53,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 18:43:53,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3b431f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53, skipping insertion in model container [2021-08-25 18:43:53,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 18:43:53,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 18:43:53,367 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_poly6.c[409,422] [2021-08-25 18:43:53,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 18:43:53,385 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 18:43:53,437 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_poly6.c[409,422] [2021-08-25 18:43:53,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 18:43:53,459 INFO L208 MainTranslator]: Completed translation [2021-08-25 18:43:53,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53 WrapperNode [2021-08-25 18:43:53,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 18:43:53,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 18:43:53,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 18:43:53,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 18:43:53,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 18:43:53,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 18:43:53,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 18:43:53,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 18:43:53,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 18:43:53,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 18:43:53,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 18:43:53,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 18:43:53,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (1/1) ... [2021-08-25 18:43:53,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 18:43:53,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:53,540 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) [2021-08-25 18:43:53,593 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 [2021-08-25 18:43:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 18:43:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 18:43:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 18:43:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 18:43:53,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 18:43:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 18:43:53,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 18:43:53,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 18:43:53,799 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 18:43:53,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:43:53 BoogieIcfgContainer [2021-08-25 18:43:53,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 18:43:53,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 18:43:53,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 18:43:53,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 18:43:53,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:43:53" (1/3) ... [2021-08-25 18:43:53,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac3aac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:43:53, skipping insertion in model container [2021-08-25 18:43:53,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:43:53" (2/3) ... [2021-08-25 18:43:53,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac3aac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:43:53, skipping insertion in model container [2021-08-25 18:43:53,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:43:53" (3/3) ... [2021-08-25 18:43:53,806 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_poly6.c [2021-08-25 18:43:53,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 18:43:53,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 18:43:53,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 18:43:53,842 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 18:43:53,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 18:43:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 18:43:53,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:53,856 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:53,857 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -56209308, now seen corresponding path program 1 times [2021-08-25 18:43:53,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:53,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400613552] [2021-08-25 18:43:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:53,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:43:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:54,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:54,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400613552] [2021-08-25 18:43:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400613552] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 18:43:54,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 18:43:54,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 18:43:54,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630812902] [2021-08-25 18:43:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 18:43:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 18:43:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 18:43:54,026 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:54,036 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-08-25 18:43:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 18:43:54,038 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-25 18:43:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:54,046 INFO L225 Difference]: With dead ends: 37 [2021-08-25 18:43:54,046 INFO L226 Difference]: Without dead ends: 16 [2021-08-25 18:43:54,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 18:43:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-25 18:43:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-25 18:43:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-25 18:43:54,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-08-25 18:43:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:54,068 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-25 18:43:54,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-25 18:43:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 18:43:54,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:54,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 18:43:54,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash -411746854, now seen corresponding path program 1 times [2021-08-25 18:43:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:54,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460633750] [2021-08-25 18:43:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:54,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:43:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:54,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:54,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460633750] [2021-08-25 18:43:54,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460633750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 18:43:54,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 18:43:54,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 18:43:54,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560514902] [2021-08-25 18:43:54,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 18:43:54,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 18:43:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-25 18:43:54,141 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:54,184 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-08-25 18:43:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 18:43:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-25 18:43:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:54,185 INFO L225 Difference]: With dead ends: 39 [2021-08-25 18:43:54,185 INFO L226 Difference]: Without dead ends: 26 [2021-08-25 18:43:54,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-25 18:43:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-25 18:43:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2021-08-25 18:43:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-25 18:43:54,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2021-08-25 18:43:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:54,189 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-25 18:43:54,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-25 18:43:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-25 18:43:54,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:54,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:54,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 18:43:54,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash 467501014, now seen corresponding path program 1 times [2021-08-25 18:43:54,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:54,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544203516] [2021-08-25 18:43:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:54,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:54,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:54,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395302394] [2021-08-25 18:43:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:54,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:54,232 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) [2021-08-25 18:43:54,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 18:43:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:43:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 18:43:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 18:43:54,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:54,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544203516] [2021-08-25 18:43:54,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:54,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395302394] [2021-08-25 18:43:54,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395302394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:54,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:54,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 18:43:54,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989376772] [2021-08-25 18:43:54,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 18:43:54,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 18:43:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 18:43:54,440 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:54,511 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-08-25 18:43:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 18:43:54,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-25 18:43:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:54,513 INFO L225 Difference]: With dead ends: 47 [2021-08-25 18:43:54,513 INFO L226 Difference]: Without dead ends: 36 [2021-08-25 18:43:54,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 18:43:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-25 18:43:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-08-25 18:43:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-25 18:43:54,516 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-08-25 18:43:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:54,517 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-25 18:43:54,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-25 18:43:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 18:43:54,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:54,518 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:54,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-25 18:43:54,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:54,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1570853842, now seen corresponding path program 2 times [2021-08-25 18:43:54,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:54,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084969137] [2021-08-25 18:43:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:54,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:54,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:54,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302792678] [2021-08-25 18:43:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 18:43:54,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:54,765 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) [2021-08-25 18:43:54,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 18:43:54,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 18:43:54,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 18:43:54,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-25 18:43:54,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:54,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-25 18:43:54,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:43:54,997 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-25 18:43:54,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-08-25 18:43:55,158 INFO L354 Elim1Store]: treesize reduction 361, result has 12.8 percent of original size [2021-08-25 18:43:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 100 treesize of output 119 [2021-08-25 18:43:55,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:43:55,244 INFO L354 Elim1Store]: treesize reduction 91, result has 3.2 percent of original size [2021-08-25 18:43:55,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 54 [2021-08-25 18:43:55,318 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-08-25 18:43:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-08-25 18:43:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:55,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:55,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084969137] [2021-08-25 18:43:55,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:55,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302792678] [2021-08-25 18:43:55,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302792678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:55,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:55,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 18:43:55,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67549855] [2021-08-25 18:43:55,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 18:43:55,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 18:43:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-25 18:43:55,418 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:55,571 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-08-25 18:43:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 18:43:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-25 18:43:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:55,574 INFO L225 Difference]: With dead ends: 54 [2021-08-25 18:43:55,574 INFO L226 Difference]: Without dead ends: 52 [2021-08-25 18:43:55,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-25 18:43:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-25 18:43:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-08-25 18:43:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-08-25 18:43:55,592 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2021-08-25 18:43:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:55,592 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-08-25 18:43:55,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-08-25 18:43:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 18:43:55,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:55,593 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:55,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 18:43:55,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-25 18:43:55,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1044113744, now seen corresponding path program 3 times [2021-08-25 18:43:55,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:55,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635141067] [2021-08-25 18:43:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:55,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:55,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:55,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818689015] [2021-08-25 18:43:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 18:43:55,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:55,818 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) [2021-08-25 18:43:55,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 18:43:55,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 18:43:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 18:43:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 18:43:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:56,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:56,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635141067] [2021-08-25 18:43:56,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:56,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818689015] [2021-08-25 18:43:56,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818689015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:56,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:56,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 18:43:56,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773989414] [2021-08-25 18:43:56,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 18:43:56,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 18:43:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 18:43:56,045 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:56,152 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-08-25 18:43:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 18:43:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-25 18:43:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:56,153 INFO L225 Difference]: With dead ends: 68 [2021-08-25 18:43:56,153 INFO L226 Difference]: Without dead ends: 61 [2021-08-25 18:43:56,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 18:43:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-25 18:43:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-08-25 18:43:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-25 18:43:56,157 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2021-08-25 18:43:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-25 18:43:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-25 18:43:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 18:43:56,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:56,159 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:56,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 18:43:56,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:56,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -592562576, now seen corresponding path program 4 times [2021-08-25 18:43:56,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:56,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103360345] [2021-08-25 18:43:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:56,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:56,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:56,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217967576] [2021-08-25 18:43:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 18:43:56,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:56,385 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) [2021-08-25 18:43:56,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 18:43:56,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 18:43:56,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 18:43:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 18:43:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:56,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:56,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103360345] [2021-08-25 18:43:56,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:56,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217967576] [2021-08-25 18:43:56,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217967576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:56,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:56,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 18:43:56,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706992085] [2021-08-25 18:43:56,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 18:43:56,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 18:43:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 18:43:56,557 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:56,635 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-08-25 18:43:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 18:43:56,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-25 18:43:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:56,636 INFO L225 Difference]: With dead ends: 71 [2021-08-25 18:43:56,637 INFO L226 Difference]: Without dead ends: 46 [2021-08-25 18:43:56,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 18:43:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-25 18:43:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2021-08-25 18:43:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-25 18:43:56,640 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2021-08-25 18:43:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:56,640 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-25 18:43:56,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-25 18:43:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 18:43:56,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:56,641 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:56,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 18:43:56,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:56,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1020544562, now seen corresponding path program 5 times [2021-08-25 18:43:56,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:56,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991439957] [2021-08-25 18:43:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:56,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:56,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:56,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081753778] [2021-08-25 18:43:56,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 18:43:56,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:56,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:56,866 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) [2021-08-25 18:43:56,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 18:43:57,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-25 18:43:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 18:43:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-25 18:43:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:57,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:43:57,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-25 18:43:57,825 INFO L354 Elim1Store]: treesize reduction 118, result has 20.8 percent of original size [2021-08-25 18:43:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 100 [2021-08-25 18:43:57,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:43:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:57,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 20 [2021-08-25 18:43:57,919 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-08-25 18:43:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-08-25 18:43:58,067 INFO L354 Elim1Store]: treesize reduction 502, result has 11.8 percent of original size [2021-08-25 18:43:58,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 111 treesize of output 138 [2021-08-25 18:43:58,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 34 [2021-08-25 18:43:58,226 INFO L354 Elim1Store]: treesize reduction 506, result has 11.1 percent of original size [2021-08-25 18:43:58,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 111 treesize of output 134 [2021-08-25 18:43:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:43:58,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 55 [2021-08-25 18:43:58,345 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-08-25 18:43:58,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 41 [2021-08-25 18:43:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:58,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:58,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991439957] [2021-08-25 18:43:58,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:58,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081753778] [2021-08-25 18:43:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081753778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:58,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-08-25 18:43:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009215415] [2021-08-25 18:43:58,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-25 18:43:58,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-25 18:43:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-25 18:43:58,444 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:58,684 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-08-25 18:43:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-25 18:43:58,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 18:43:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:58,685 INFO L225 Difference]: With dead ends: 61 [2021-08-25 18:43:58,685 INFO L226 Difference]: Without dead ends: 59 [2021-08-25 18:43:58,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-25 18:43:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-25 18:43:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-08-25 18:43:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-25 18:43:58,689 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 23 [2021-08-25 18:43:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:58,689 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-25 18:43:58,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-25 18:43:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 18:43:58,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:58,690 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:58,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 18:43:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:58,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash 5627308, now seen corresponding path program 6 times [2021-08-25 18:43:58,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:58,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17099117] [2021-08-25 18:43:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:58,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:58,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:58,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566115385] [2021-08-25 18:43:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 18:43:58,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:58,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:58,911 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) [2021-08-25 18:43:58,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 18:43:59,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-25 18:43:59,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 18:43:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 18:43:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:59,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:59,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17099117] [2021-08-25 18:43:59,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:59,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566115385] [2021-08-25 18:43:59,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566115385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:59,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:59,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 18:43:59,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910875558] [2021-08-25 18:43:59,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 18:43:59,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 18:43:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-25 18:43:59,253 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:59,417 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-08-25 18:43:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 18:43:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-25 18:43:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:59,418 INFO L225 Difference]: With dead ends: 88 [2021-08-25 18:43:59,418 INFO L226 Difference]: Without dead ends: 81 [2021-08-25 18:43:59,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-25 18:43:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-25 18:43:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 41. [2021-08-25 18:43:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-25 18:43:59,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 25 [2021-08-25 18:43:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:43:59,422 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-25 18:43:59,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-25 18:43:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 18:43:59,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:43:59,423 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:43:59,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 18:43:59,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:59,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:43:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:43:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 154602860, now seen corresponding path program 7 times [2021-08-25 18:43:59,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:43:59,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511823783] [2021-08-25 18:43:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:43:59,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:43:59,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:43:59,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766341688] [2021-08-25 18:43:59,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 18:43:59,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:43:59,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:43:59,649 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) [2021-08-25 18:43:59,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 18:43:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:43:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 18:43:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:43:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:43:59,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:43:59,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511823783] [2021-08-25 18:43:59,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:43:59,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766341688] [2021-08-25 18:43:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766341688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:43:59,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:43:59,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 18:43:59,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546342327] [2021-08-25 18:43:59,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 18:43:59,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:43:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 18:43:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-25 18:43:59,891 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:43:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:43:59,996 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-08-25 18:43:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 18:43:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-25 18:43:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:43:59,998 INFO L225 Difference]: With dead ends: 91 [2021-08-25 18:43:59,998 INFO L226 Difference]: Without dead ends: 79 [2021-08-25 18:43:59,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-25 18:43:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-25 18:44:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2021-08-25 18:44:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-25 18:44:00,002 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 25 [2021-08-25 18:44:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:44:00,002 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-25 18:44:00,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-25 18:44:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 18:44:00,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:44:00,003 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:44:00,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 18:44:00,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:44:00,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:44:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:44:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1536708150, now seen corresponding path program 8 times [2021-08-25 18:44:00,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:44:00,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028245628] [2021-08-25 18:44:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:44:00,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:44:00,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:44:00,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166261498] [2021-08-25 18:44:00,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 18:44:00,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:44:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:44:00,233 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) [2021-08-25 18:44:00,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 18:44:00,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 18:44:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 18:44:00,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-25 18:44:00,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:44:00,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:44:00,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-25 18:44:00,681 INFO L354 Elim1Store]: treesize reduction 70, result has 17.6 percent of original size [2021-08-25 18:44:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 78 [2021-08-25 18:44:00,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:44:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-08-25 18:44:00,861 INFO L354 Elim1Store]: treesize reduction 204, result has 18.1 percent of original size [2021-08-25 18:44:00,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 119 [2021-08-25 18:44:00,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2021-08-25 18:44:01,004 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-08-25 18:44:01,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-08-25 18:44:01,175 INFO L354 Elim1Store]: treesize reduction 647, result has 12.1 percent of original size [2021-08-25 18:44:01,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 120 treesize of output 163 [2021-08-25 18:44:01,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 18:44:01,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 62 [2021-08-25 18:44:01,392 INFO L354 Elim1Store]: treesize reduction 659, result has 10.5 percent of original size [2021-08-25 18:44:01,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 120 treesize of output 151 [2021-08-25 18:44:01,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:44:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 51 [2021-08-25 18:44:01,608 INFO L354 Elim1Store]: treesize reduction 659, result has 10.5 percent of original size [2021-08-25 18:44:01,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 120 treesize of output 151 [2021-08-25 18:44:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 68 [2021-08-25 18:44:01,736 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-08-25 18:44:01,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 55 [2021-08-25 18:44:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:44:01,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:44:01,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028245628] [2021-08-25 18:44:01,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:44:01,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166261498] [2021-08-25 18:44:01,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166261498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:44:01,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:44:01,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-08-25 18:44:01,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499512141] [2021-08-25 18:44:01,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-25 18:44:01,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:44:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-25 18:44:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-25 18:44:01,852 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:02,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:44:02,543 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-08-25 18:44:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-25 18:44:02,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 18:44:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:44:02,544 INFO L225 Difference]: With dead ends: 86 [2021-08-25 18:44:02,544 INFO L226 Difference]: Without dead ends: 84 [2021-08-25 18:44:02,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-25 18:44:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-25 18:44:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-08-25 18:44:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-08-25 18:44:02,548 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 27 [2021-08-25 18:44:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:44:02,549 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-08-25 18:44:02,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-08-25 18:44:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 18:44:02,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:44:02,549 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:44:02,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 18:44:02,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 18:44:02,750 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:44:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:44:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2028432260, now seen corresponding path program 1 times [2021-08-25 18:44:02,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:44:02,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799297695] [2021-08-25 18:44:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:44:02,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:44:02,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 18:44:02,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871484301] [2021-08-25 18:44:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:44:02,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:44:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:44:02,777 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) [2021-08-25 18:44:02,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 18:44:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:44:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-25 18:44:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:44:03,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:44:03,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-25 18:44:03,095 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-25 18:44:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-08-25 18:44:03,205 INFO L354 Elim1Store]: treesize reduction 372, result has 14.7 percent of original size [2021-08-25 18:44:03,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 130 [2021-08-25 18:44:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 56 [2021-08-25 18:44:03,309 INFO L354 Elim1Store]: treesize reduction 391, result has 10.3 percent of original size [2021-08-25 18:44:03,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 111 [2021-08-25 18:44:03,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 18:44:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 18:44:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-08-25 18:44:03,408 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-25 18:44:03,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 29 [2021-08-25 18:44:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:44:03,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:44:03,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799297695] [2021-08-25 18:44:03,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 18:44:03,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871484301] [2021-08-25 18:44:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871484301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:44:03,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 18:44:03,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-08-25 18:44:03,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512439325] [2021-08-25 18:44:03,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-25 18:44:03,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:44:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-25 18:44:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-25 18:44:03,649 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:44:04,102 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-08-25 18:44:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-25 18:44:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 18:44:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:44:04,103 INFO L225 Difference]: With dead ends: 76 [2021-08-25 18:44:04,103 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 18:44:04,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-25 18:44:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 18:44:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 18:44:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 18:44:04,104 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-08-25 18:44:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:44:04,104 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 18:44:04,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 18:44:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 18:44:04,104 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 18:44:04,106 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 18:44:04,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 18:44:04,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:44:04,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 18:44:04,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 18:44:04,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 18:44:04,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 18:44:04,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 18:44:05,448 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-08-25 18:44:05,448 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (let ((.cse1 (select |#memory_int| |ULTIMATE.start_main_~#a~0.base|)) (.cse6 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse7 (< 1 ULTIMATE.start_main_~S~0))) (let ((.cse0 (or (and .cse6 .cse7 (< 2 ULTIMATE.start_main_~S~0) (<= 0 ULTIMATE.start_main_~i~0)) (and .cse6 (<= 2 ULTIMATE.start_main_~i~0) .cse7))) (.cse3 (select .cse1 (+ |ULTIMATE.start_main_~#a~0.offset| 8)))) (let ((.cse10 (<= ULTIMATE.start_main_~S~0 2147483647)) (.cse5 (= (+ .cse3 1) 0)) (.cse9 (<= ULTIMATE.start_main_~S~0 2)) (.cse4 (= (+ (select .cse1 |ULTIMATE.start_main_~#a~0.offset|) 1) 0)) (.cse8 (= ULTIMATE.start_main_~i~0 0)) (.cse2 (<= ULTIMATE.start_main_~S~0 3)) (.cse11 (or (and .cse0 (<= 1 ULTIMATE.start_main_~i~0)) (and .cse0 (< 3 ULTIMATE.start_main_~S~0))))) (or (and .cse0 (= 0 (+ (select .cse1 (+ |ULTIMATE.start_main_~#a~0.offset| 16)) 1)) .cse2 (= (+ .cse3 2) 0) (<= ULTIMATE.start_main_~i~0 0) .cse4) (and .cse5 .cse6 .cse7 .cse8 .cse9 .cse4) (and .cse0 (<= ULTIMATE.start_main_~i~0 2) .cse9) (and .cse10 .cse11 .cse8) (and (<= 0 ULTIMATE.start___VERIFIER_assert_~cond) .cse10 .cse11) (and .cse5 .cse6 .cse7 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~i~0 1) .cse9 .cse4) (and (<= ULTIMATE.start_main_~S~0 0) .cse8) (and .cse2 (<= 3 ULTIMATE.start_main_~i~0) .cse11 (<= ULTIMATE.start_main_~i~0 3)))))) [2021-08-25 18:44:05,448 INFO L857 garLoopResultBuilder]: For program point L23-4(lines 23 24) no Hoare annotation was computed. [2021-08-25 18:44:05,448 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 18:44:05,448 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 18:44:05,448 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L20-2(lines 20 21) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L853 garLoopResultBuilder]: At program point L20-3(lines 20 21) the Hoare annotation is: (let ((.cse16 (select |#memory_int| |ULTIMATE.start_main_~#a~0.base|))) (let ((.cse17 (select .cse16 (+ |ULTIMATE.start_main_~#a~0.offset| 8))) (.cse14 (select .cse16 (+ |ULTIMATE.start_main_~#a~0.offset| 16)))) (let ((.cse2 (= .cse14 3)) (.cse0 (= (+ .cse17 1) 0)) (.cse11 (<= 2 ULTIMATE.start_main_~i~0)) (.cse3 (< 2 ULTIMATE.start_main_~S~0)) (.cse4 (<= ULTIMATE.start_main_~S~0 3)) (.cse7 (= (+ .cse17 2) 0)) (.cse12 (< 1 ULTIMATE.start_main_~S~0)) (.cse15 (= .cse17 0)) (.cse13 (<= ULTIMATE.start_main_~S~0 2)) (.cse6 (= (+ (select .cse16 |ULTIMATE.start_main_~#a~0.offset|) 1) 0)) (.cse5 (= ULTIMATE.start_main_~i~0 0)) (.cse1 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse8 (<= ULTIMATE.start_main_~S~0 2147483647)) (.cse10 (= ULTIMATE.start_main_~i~0 1)) (.cse9 (< 3 ULTIMATE.start_main_~S~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~i~0 2) .cse7 .cse6) (and .cse1 .cse8 .cse5 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse10 .cse6) (and .cse1 .cse11 .cse8 .cse9) (and .cse0 .cse1 .cse11 .cse12 (<= ULTIMATE.start_main_~i~0 2) .cse13 .cse6) (and .cse1 (= 0 (+ .cse14 1)) .cse3 .cse4 (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 3) .cse7 .cse6) (and .cse1 .cse12 .cse15 .cse10 .cse13 .cse6) (and .cse1 .cse12 .cse15 .cse5 .cse13 .cse6) (and (<= ULTIMATE.start_main_~S~0 0) .cse5) (and .cse1 .cse8 .cse10 .cse9))))) [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L20-4(lines 20 21) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L8-3(line 8) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L860 garLoopResultBuilder]: At program point L25(lines 10 26) the Hoare annotation is: true [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L17-2(lines 17 18) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L853 garLoopResultBuilder]: At program point L17-3(lines 17 18) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (< 1 ULTIMATE.start_main_~S~0)) (.cse2 (<= ULTIMATE.start_main_~S~0 2147483647))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~i~0 1) (= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0.base|) |ULTIMATE.start_main_~#a~0.offset|) 1) 0)) (and .cse0 .cse2 (<= 3 ULTIMATE.start_main_~i~0) (< 3 ULTIMATE.start_main_~S~0)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~i~0 0)))) [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L17-4(lines 17 18) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L5(lines 5 7) no Hoare annotation was computed. [2021-08-25 18:44:05,449 INFO L857 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-08-25 18:44:05,452 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 18:44:05,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 06:44:05 BoogieIcfgContainer [2021-08-25 18:44:05,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 18:44:05,469 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 18:44:05,469 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 18:44:05,469 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 18:44:05,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:43:53" (3/4) ... [2021-08-25 18:44:05,471 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 18:44:05,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-25 18:44:05,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-25 18:44:05,477 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 18:44:05,477 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 18:44:05,505 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 18:44:05,505 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 18:44:05,506 INFO L168 Benchmark]: Toolchain (without parser) took 12268.83 ms. Allocated memory was 54.5 MB in the beginning and 209.7 MB in the end (delta: 155.2 MB). Free memory was 33.6 MB in the beginning and 137.7 MB in the end (delta: -104.1 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. [2021-08-25 18:44:05,506 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 36.7 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 18:44:05,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.06 ms. Allocated memory is still 54.5 MB. Free memory was 33.5 MB in the beginning and 37.7 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 18:44:05,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.73 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 18:44:05,506 INFO L168 Benchmark]: Boogie Preprocessor took 33.20 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 35.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 18:44:05,507 INFO L168 Benchmark]: RCFGBuilder took 280.03 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.1 MB in the beginning and 47.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-08-25 18:44:05,507 INFO L168 Benchmark]: TraceAbstraction took 11666.65 ms. Allocated memory was 67.1 MB in the beginning and 209.7 MB in the end (delta: 142.6 MB). Free memory was 46.7 MB in the beginning and 140.9 MB in the end (delta: -94.2 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. [2021-08-25 18:44:05,507 INFO L168 Benchmark]: Witness Printer took 36.54 ms. Allocated memory is still 209.7 MB. Free memory was 140.9 MB in the beginning and 137.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 18:44:05,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 36.7 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 223.06 ms. Allocated memory is still 54.5 MB. Free memory was 33.5 MB in the beginning and 37.7 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.73 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.20 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 35.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 280.03 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.1 MB in the beginning and 47.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11666.65 ms. Allocated memory was 67.1 MB in the beginning and 209.7 MB in the end (delta: 142.6 MB). Free memory was 46.7 MB in the beginning and 140.9 MB in the end (delta: -94.2 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. * Witness Printer took 36.54 ms. Allocated memory is still 209.7 MB. Free memory was 140.9 MB in the beginning and 137.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11615.2ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 10.7ms, AutomataDifference: 2169.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1108.5ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 196 SDtfs, 490 SDslu, 622 SDs, 0 SdLazy, 1758 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1038.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1391.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=10, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 189 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 41 NumberOfFragments, 733 HoareAnnotationTreeSize, 4 FomulaSimplifications, 4964611 FormulaSimplificationTreeSizeReduction, 170.0ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 2483696 FormulaSimplificationTreeSizeReductionInter, 932.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 66.1ms SsaConstructionTime, 1326.3ms SatisfiabilityAnalysisTime, 3915.1ms InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 2573 SizeOfPredicates, 53 NumberOfNonLiveVariables, 805 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 39/156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((((((((((((unknown-#memory_int-unknown[a][a + 8] + 1 == 0 && cond == 1) && unknown-#memory_int-unknown[a][a + 16] == 3) && 2 < S) && S <= 3) && i == 0) && unknown-#memory_int-unknown[a][a] + 1 == 0) || ((((((cond == 1 && unknown-#memory_int-unknown[a][a + 16] == 3) && 2 < S) && S <= 3) && i == 2) && unknown-#memory_int-unknown[a][a + 8] + 2 == 0) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (((cond == 1 && S <= 2147483647) && i == 0) && 3 < S)) || ((((((unknown-#memory_int-unknown[a][a + 8] + 1 == 0 && cond == 1) && unknown-#memory_int-unknown[a][a + 16] == 3) && 2 < S) && S <= 3) && i == 1) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (((cond == 1 && 2 <= i) && S <= 2147483647) && 3 < S)) || ((((((unknown-#memory_int-unknown[a][a + 8] + 1 == 0 && cond == 1) && 2 <= i) && 1 < S) && i <= 2) && S <= 2) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (((((((cond == 1 && 0 == unknown-#memory_int-unknown[a][a + 16] + 1) && 2 < S) && S <= 3) && 3 <= i) && i <= 3) && unknown-#memory_int-unknown[a][a + 8] + 2 == 0) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (((((cond == 1 && 1 < S) && unknown-#memory_int-unknown[a][a + 8] == 0) && i == 1) && S <= 2) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (((((cond == 1 && 1 < S) && unknown-#memory_int-unknown[a][a + 8] == 0) && i == 0) && S <= 2) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (S <= 0 && i == 0)) || (((cond == 1 && S <= 2147483647) && i == 1) && 3 < S) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((((((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 0 == unknown-#memory_int-unknown[a][a + 16] + 1) && S <= 3) && unknown-#memory_int-unknown[a][a + 8] + 2 == 0) && i <= 0) && unknown-#memory_int-unknown[a][a] + 1 == 0) || (((((unknown-#memory_int-unknown[a][a + 8] + 1 == 0 && cond == 1) && 1 < S) && i == 0) && S <= 2) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || ((((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && i <= 2) && S <= 2)) || ((S <= 2147483647 && ((((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 1 <= i) || (((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 3 < S))) && i == 0)) || ((0 <= cond && S <= 2147483647) && ((((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 1 <= i) || (((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 3 < S)))) || ((((((unknown-#memory_int-unknown[a][a + 8] + 1 == 0 && cond == 1) && 1 < S) && 1 <= cond) && i == 1) && S <= 2) && unknown-#memory_int-unknown[a][a] + 1 == 0)) || (S <= 0 && i == 0)) || (((S <= 3 && 3 <= i) && ((((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 1 <= i) || (((((cond == 1 && 1 < S) && 2 < S) && 0 <= i) || ((cond == 1 && 2 <= i) && 1 < S)) && 3 < S))) && i <= 3) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((cond == 1 && 1 < S) && S <= 2147483647) && i == 1) && unknown-#memory_int-unknown[a][a] + 1 == 0) || (((cond == 1 && S <= 2147483647) && 3 <= i) && 3 < S)) || (((cond == 1 && 1 < S) && S <= 2147483647) && i == 0) RESULT: Ultimate proved your program to be correct! [2021-08-25 18:44:05,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...