./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 c3fed411 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 26ad3956041b2e839611ff318d272e1f932670752c1f7180f45920516dc03b70 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 01:08:12,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 01:08:12,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 01:08:12,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 01:08:12,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 01:08:12,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 01:08:12,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 01:08:12,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 01:08:12,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 01:08:13,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 01:08:13,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 01:08:13,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 01:08:13,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 01:08:13,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 01:08:13,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 01:08:13,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 01:08:13,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 01:08:13,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 01:08:13,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 01:08:13,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 01:08:13,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 01:08:13,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 01:08:13,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 01:08:13,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 01:08:13,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 01:08:13,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 01:08:13,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 01:08:13,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 01:08:13,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 01:08:13,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 01:08:13,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 01:08:13,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 01:08:13,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 01:08:13,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 01:08:13,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 01:08:13,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 01:08:13,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 01:08:13,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 01:08:13,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 01:08:13,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 01:08:13,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 01:08:13,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 01:08:13,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 01:08:13,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 01:08:13,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 01:08:13,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 01:08:13,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 01:08:13,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 01:08:13,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 01:08:13,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 01:08:13,066 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 01:08:13,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 01:08:13,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 01:08:13,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 01:08:13,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 01:08:13,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 01:08:13,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 01:08:13,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 01:08:13,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 01:08:13,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 01:08:13,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:08:13,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 01:08:13,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 01:08:13,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 01:08:13,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 01:08:13,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 01:08:13,070 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 01:08:13,070 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 01:08:13,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 01:08:13,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 01:08:13,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26ad3956041b2e839611ff318d272e1f932670752c1f7180f45920516dc03b70 [2021-12-17 01:08:13,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 01:08:13,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 01:08:13,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 01:08:13,384 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 01:08:13,384 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 01:08:13,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tiling_poly6.c [2021-12-17 01:08:13,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765874426/6821448c1cae4f38a807107b8ba68a8f/FLAGc37648c22 [2021-12-17 01:08:13,831 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 01:08:13,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_poly6.c [2021-12-17 01:08:13,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765874426/6821448c1cae4f38a807107b8ba68a8f/FLAGc37648c22 [2021-12-17 01:08:13,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765874426/6821448c1cae4f38a807107b8ba68a8f [2021-12-17 01:08:13,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 01:08:13,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 01:08:13,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 01:08:13,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 01:08:13,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 01:08:13,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:08:13" (1/1) ... [2021-12-17 01:08:13,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdb4219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:13, skipping insertion in model container [2021-12-17 01:08:13,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:08:13" (1/1) ... [2021-12-17 01:08:13,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 01:08:13,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 01:08:14,049 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_poly6.c[409,422] [2021-12-17 01:08:14,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:08:14,077 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 01:08:14,091 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_poly6.c[409,422] [2021-12-17 01:08:14,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:08:14,120 INFO L208 MainTranslator]: Completed translation [2021-12-17 01:08:14,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14 WrapperNode [2021-12-17 01:08:14,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 01:08:14,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 01:08:14,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 01:08:14,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 01:08:14,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,160 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2021-12-17 01:08:14,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 01:08:14,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 01:08:14,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 01:08:14,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 01:08:14,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 01:08:14,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 01:08:14,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 01:08:14,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 01:08:14,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (1/1) ... [2021-12-17 01:08:14,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:08:14,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:14,244 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) [2021-12-17 01:08:14,255 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 [2021-12-17 01:08:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 01:08:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 01:08:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 01:08:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 01:08:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 01:08:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 01:08:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 01:08:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 01:08:14,336 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 01:08:14,337 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 01:08:14,484 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 01:08:14,488 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 01:08:14,488 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 01:08:14,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:08:14 BoogieIcfgContainer [2021-12-17 01:08:14,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 01:08:14,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 01:08:14,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 01:08:14,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 01:08:14,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:08:13" (1/3) ... [2021-12-17 01:08:14,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b26f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:08:14, skipping insertion in model container [2021-12-17 01:08:14,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:14" (2/3) ... [2021-12-17 01:08:14,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b26f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:08:14, skipping insertion in model container [2021-12-17 01:08:14,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:08:14" (3/3) ... [2021-12-17 01:08:14,507 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_poly6.c [2021-12-17 01:08:14,511 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 01:08:14,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 01:08:14,608 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 01:08:14,614 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 01:08:14,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 01:08:14,650 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) [2021-12-17 01:08:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 01:08:14,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:14,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:14,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash -56209308, now seen corresponding path program 1 times [2021-12-17 01:08:14,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:14,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218407338] [2021-12-17 01:08:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:14,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:14,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:14,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218407338] [2021-12-17 01:08:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218407338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:08:14,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:08:14,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 01:08:14,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572324052] [2021-12-17 01:08:14,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:08:14,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 01:08:14,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:14,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 01:08:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:08:14,894 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) [2021-12-17 01:08:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:14,911 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-12-17 01:08:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 01:08:14,917 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 [2021-12-17 01:08:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:14,923 INFO L225 Difference]: With dead ends: 37 [2021-12-17 01:08:14,923 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 01:08:14,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:08:14,930 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:14,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:08:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 01:08:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 01:08:14,973 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) [2021-12-17 01:08:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-17 01:08:14,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-12-17 01:08:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:14,975 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-17 01:08:14,975 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) [2021-12-17 01:08:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-17 01:08:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 01:08:14,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:14,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:14,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 01:08:14,978 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash -411746854, now seen corresponding path program 1 times [2021-12-17 01:08:14,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:14,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139370249] [2021-12-17 01:08:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:14,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:15,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:15,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139370249] [2021-12-17 01:08:15,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139370249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:08:15,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:08:15,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 01:08:15,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571757260] [2021-12-17 01:08:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:08:15,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 01:08:15,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 01:08:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:08:15,059 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) [2021-12-17 01:08:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:15,115 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-17 01:08:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 01:08:15,116 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 [2021-12-17 01:08:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:15,117 INFO L225 Difference]: With dead ends: 39 [2021-12-17 01:08:15,117 INFO L226 Difference]: Without dead ends: 26 [2021-12-17 01:08:15,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:08:15,122 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:15,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:08:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-17 01:08:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2021-12-17 01:08:15,127 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) [2021-12-17 01:08:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-12-17 01:08:15,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2021-12-17 01:08:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:15,130 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-12-17 01:08:15,130 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) [2021-12-17 01:08:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-12-17 01:08:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 01:08:15,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:15,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:15,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 01:08:15,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 467501014, now seen corresponding path program 1 times [2021-12-17 01:08:15,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:15,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333630457] [2021-12-17 01:08:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:15,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:15,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:08:15,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068328308] [2021-12-17 01:08:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:15,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:15,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:15,166 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) [2021-12-17 01:08:15,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 01:08:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 01:08:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:08:15,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:08:15,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333630457] [2021-12-17 01:08:15,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:08:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068328308] [2021-12-17 01:08:15,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068328308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:15,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:08:15,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-17 01:08:15,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069972129] [2021-12-17 01:08:15,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:15,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 01:08:15,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 01:08:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-17 01:08:15,468 INFO L87 Difference]: Start difference. First operand 18 states and 20 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) [2021-12-17 01:08:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:15,560 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-17 01:08:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 01:08:15,561 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 15 [2021-12-17 01:08:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:15,561 INFO L225 Difference]: With dead ends: 47 [2021-12-17 01:08:15,561 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 01:08:15,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-17 01:08:15,563 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:15,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:08:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 01:08:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-12-17 01:08:15,566 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) [2021-12-17 01:08:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-17 01:08:15,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-12-17 01:08:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:15,567 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-17 01:08:15,567 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) [2021-12-17 01:08:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-17 01:08:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 01:08:15,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:15,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:15,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:15,783 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 [2021-12-17 01:08:15,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1570853842, now seen corresponding path program 2 times [2021-12-17 01:08:15,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:15,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122818730] [2021-12-17 01:08:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:15,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:15,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:08:15,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444855220] [2021-12-17 01:08:15,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:08:15,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:15,795 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) [2021-12-17 01:08:15,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 01:08:15,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:08:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 01:08:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:15,889 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 0 case distinctions, treesize of input 59 treesize of output 54 [2021-12-17 01:08:15,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-17 01:08:15,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 01:08:15,947 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 0 case distinctions, treesize of input 69 treesize of output 62 [2021-12-17 01:08:15,963 INFO L354 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2021-12-17 01:08:15,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 61 treesize of output 81 [2021-12-17 01:08:15,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 01:08:16,002 INFO L354 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-12-17 01:08:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 37 [2021-12-17 01:08:16,072 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 0 case distinctions, treesize of input 116 treesize of output 105 [2021-12-17 01:08:16,091 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-12-17 01:08:16,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 104 treesize of output 106 [2021-12-17 01:08:16,137 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-17 01:08:16,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 30 [2021-12-17 01:08:16,170 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-17 01:08:16,170 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 [2021-12-17 01:08:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:16,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-12-17 01:08:16,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:08:16,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 01:08:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 57 [2021-12-17 01:08:16,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2021-12-17 01:08:16,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-17 01:08:16,734 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-12-17 01:08:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 79 [2021-12-17 01:08:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:16,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:16,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122818730] [2021-12-17 01:08:16,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:08:16,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444855220] [2021-12-17 01:08:16,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444855220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:16,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:08:16,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2021-12-17 01:08:16,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169745747] [2021-12-17 01:08:16,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:16,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 01:08:16,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:16,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 01:08:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-17 01:08:16,810 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:08:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:16,973 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-17 01:08:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 01:08:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 01:08:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:16,974 INFO L225 Difference]: With dead ends: 65 [2021-12-17 01:08:16,974 INFO L226 Difference]: Without dead ends: 63 [2021-12-17 01:08:16,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-17 01:08:16,975 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:16,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 72 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 112 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-12-17 01:08:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-17 01:08:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2021-12-17 01:08:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2021-12-17 01:08:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-17 01:08:16,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 19 [2021-12-17 01:08:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:16,990 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-17 01:08:16,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:08:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-17 01:08:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 01:08:16,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:16,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:17,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 01:08:17,207 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 [2021-12-17 01:08:17,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1472095730, now seen corresponding path program 3 times [2021-12-17 01:08:17,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256527587] [2021-12-17 01:08:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:17,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:17,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:08:17,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884836407] [2021-12-17 01:08:17,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:08:17,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:17,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:17,236 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) [2021-12-17 01:08:17,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 01:08:17,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 01:08:17,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 01:08:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:17,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:17,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:17,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256527587] [2021-12-17 01:08:17,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:08:17,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884836407] [2021-12-17 01:08:17,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884836407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:17,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:08:17,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-17 01:08:17,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132779668] [2021-12-17 01:08:17,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:17,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 01:08:17,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:17,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 01:08:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-17 01:08:17,456 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-12-17 01:08:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:17,706 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-12-17 01:08:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 01:08:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 [2021-12-17 01:08:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:17,708 INFO L225 Difference]: With dead ends: 103 [2021-12-17 01:08:17,709 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 01:08:17,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-12-17 01:08:17,710 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 109 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:17,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 162 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 01:08:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 01:08:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2021-12-17 01:08:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 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) [2021-12-17 01:08:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-17 01:08:17,716 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 23 [2021-12-17 01:08:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:17,717 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-17 01:08:17,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-12-17 01:08:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-17 01:08:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 01:08:17,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:17,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:17,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:17,937 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 [2021-12-17 01:08:17,938 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1261986696, now seen corresponding path program 1 times [2021-12-17 01:08:17,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054240975] [2021-12-17 01:08:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:17,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:17,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:08:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324419836] [2021-12-17 01:08:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:17,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:17,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:17,950 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) [2021-12-17 01:08:17,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 01:08:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 01:08:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:18,027 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 13 treesize of output 9 [2021-12-17 01:08:18,053 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 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-17 01:08:18,066 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-12-17 01:08:18,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 50 treesize of output 64 [2021-12-17 01:08:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:18,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 19 [2021-12-17 01:08:18,118 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 0 case distinctions, treesize of input 31 treesize of output 15 [2021-12-17 01:08:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:08:18,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:46,429 WARN L227 SmtUtils]: Spent 13.76s on a formula simplification that was a NOOP. DAG size: 28 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 01:08:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-12-17 01:08:59,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 01:08:59,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 57 [2021-12-17 01:08:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-17 01:08:59,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2021-12-17 01:08:59,987 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-12-17 01:08:59,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 48 [2021-12-17 01:09:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:09:00,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:09:00,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054240975] [2021-12-17 01:09:00,027 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:09:00,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324419836] [2021-12-17 01:09:00,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324419836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:09:00,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:09:00,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-12-17 01:09:00,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762143650] [2021-12-17 01:09:00,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:09:00,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 01:09:00,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:09:00,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 01:09:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2021-12-17 01:09:00,029 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:09:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:09:00,030 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-17 01:09:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 01:09:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-17 01:09:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:09:00,030 INFO L225 Difference]: With dead ends: 47 [2021-12-17 01:09:00,030 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 01:09:00,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2021-12-17 01:09:00,033 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:09:00,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:09:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 01:09:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 01:09:00,036 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) [2021-12-17 01:09:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 01:09:00,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-12-17 01:09:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:09:00,036 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 01:09:00,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:09:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 01:09:00,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 01:09:00,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 01:09:00,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 01:09:00,259 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 [2021-12-17 01:09:00,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 01:09:00,270 INFO L858 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-12-17 01:09:00,270 INFO L854 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~S~0#1| 0) (= |ULTIMATE.start_main_~i~0#1| 0)) [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point L23-4(lines 23 24) no Hoare annotation was computed. [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point L20-2(lines 20 21) no Hoare annotation was computed. [2021-12-17 01:09:00,271 INFO L854 garLoopResultBuilder]: At program point L20-3(lines 20 21) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~S~0#1| 0) (= |ULTIMATE.start_main_~i~0#1| 0)) [2021-12-17 01:09:00,271 INFO L858 garLoopResultBuilder]: For program point L20-4(lines 20 21) no Hoare annotation was computed. [2021-12-17 01:09:00,272 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-17 01:09:00,272 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-12-17 01:09:00,272 INFO L858 garLoopResultBuilder]: For program point L8-3(line 8) no Hoare annotation was computed. [2021-12-17 01:09:00,272 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 01:09:00,272 INFO L861 garLoopResultBuilder]: At program point L25(lines 10 26) the Hoare annotation is: true [2021-12-17 01:09:00,272 INFO L858 garLoopResultBuilder]: For program point L17-2(lines 17 18) no Hoare annotation was computed. [2021-12-17 01:09:00,273 INFO L854 garLoopResultBuilder]: At program point L17-3(lines 17 18) the Hoare annotation is: false [2021-12-17 01:09:00,273 INFO L858 garLoopResultBuilder]: For program point L17-4(lines 17 18) no Hoare annotation was computed. [2021-12-17 01:09:00,273 INFO L858 garLoopResultBuilder]: For program point L5(lines 5 7) no Hoare annotation was computed. [2021-12-17 01:09:00,273 INFO L858 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-12-17 01:09:00,276 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2021-12-17 01:09:00,277 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 01:09:00,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 01:09:00 BoogieIcfgContainer [2021-12-17 01:09:00,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 01:09:00,288 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 01:09:00,289 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 01:09:00,289 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 01:09:00,289 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:08:14" (3/4) ... [2021-12-17 01:09:00,291 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 01:09:00,298 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-17 01:09:00,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 01:09:00,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 01:09:00,299 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 01:09:00,333 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 01:09:00,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 01:09:00,334 INFO L158 Benchmark]: Toolchain (without parser) took 46475.24ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 67.0MB in the beginning and 62.1MB in the end (delta: 4.8MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,334 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory was 49.5MB in the beginning and 49.4MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 01:09:00,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.15ms. Allocated memory is still 100.7MB. Free memory was 66.8MB in the beginning and 77.2MB in the end (delta: -10.4MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,337 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.51ms. Allocated memory is still 100.7MB. Free memory was 77.2MB in the beginning and 75.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,337 INFO L158 Benchmark]: Boogie Preprocessor took 41.06ms. Allocated memory is still 100.7MB. Free memory was 75.7MB in the beginning and 74.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,337 INFO L158 Benchmark]: RCFGBuilder took 285.80ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 64.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,337 INFO L158 Benchmark]: TraceAbstraction took 45797.20ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 64.1MB in the beginning and 65.3MB in the end (delta: -1.1MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,338 INFO L158 Benchmark]: Witness Printer took 44.68ms. Allocated memory is still 130.0MB. Free memory was 65.3MB in the beginning and 62.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 01:09:00,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory was 49.5MB in the beginning and 49.4MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.15ms. Allocated memory is still 100.7MB. Free memory was 66.8MB in the beginning and 77.2MB in the end (delta: -10.4MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.51ms. Allocated memory is still 100.7MB. Free memory was 77.2MB in the beginning and 75.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.06ms. Allocated memory is still 100.7MB. Free memory was 75.7MB in the beginning and 74.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 285.80ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 64.6MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 45797.20ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 64.1MB in the beginning and 65.3MB in the end (delta: -1.1MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. * Witness Printer took 44.68ms. Allocated memory is still 130.0MB. Free memory was 65.3MB in the beginning and 62.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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: 45.7s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 242 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 242 mSDsluCounter, 308 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60 IncrementalHoareTripleChecker+Unchecked, 213 mSDsCounter, 122 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 459 IncrementalHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 122 mSolverCounterUnsat, 95 mSDtfsCounter, 459 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 28.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 94 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 7 NumberOfFragments, 16 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 43.5s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 172 ConstructedInterpolants, 6 QuantifiedInterpolants, 1660 SizeOfPredicates, 36 NumberOfNonLiveVariables, 371 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 21/80 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: S <= 0 && i == 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: S <= 0 && i == 0 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-12-17 01:09:00,369 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE