./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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-fpi/res2o.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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:51:45,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:51:45,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:51:45,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:51:45,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:51:45,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:51:45,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:51:45,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:51:45,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:51:45,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:51:45,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:51:45,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:51:45,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:51:45,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:51:45,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:51:45,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:51:45,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:51:45,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:51:45,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:51:45,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:51:45,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:51:45,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:51:45,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:51:45,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:51:45,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:51:45,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:51:45,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:51:45,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:51:45,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:51:45,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:51:45,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:51:45,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:51:45,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:51:45,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:51:45,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:51:45,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:51:45,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:51:45,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:51:45,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:51:45,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:51:45,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:51:45,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:51:45,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:51:45,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:51:45,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:51:45,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:51:45,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:51:45,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:51:45,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:51:45,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:51:45,892 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:51:45,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:51:45,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:51:45,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:51:45,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:51:45,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:51:45,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:51:45,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:51:45,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:51:45,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:51:45,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:51:45,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:51:45,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:51:45,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:51:45,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:51:45,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:51:45,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:51:45,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:51:45,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:51:45,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:51:45,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:51:45,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:51:45,897 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:51:45,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:51:45,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:51:45,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:51:45,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2021-12-15 08:51:46,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:51:46,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:51:46,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:51:46,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:51:46,167 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:51:46,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2o.c [2021-12-15 08:51:46,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b44094ffd/5eef9cd9aa7e48b9a343b91fe2ac003d/FLAGcebf440d2 [2021-12-15 08:51:46,581 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:51:46,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2o.c [2021-12-15 08:51:46,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b44094ffd/5eef9cd9aa7e48b9a343b91fe2ac003d/FLAGcebf440d2 [2021-12-15 08:51:47,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b44094ffd/5eef9cd9aa7e48b9a343b91fe2ac003d [2021-12-15 08:51:47,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:51:47,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:51:47,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:51:47,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:51:47,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:51:47,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ddfffba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47, skipping insertion in model container [2021-12-15 08:51:47,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:51:47,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:51:47,150 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-fpi/res2o.c[588,601] [2021-12-15 08:51:47,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:51:47,172 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:51:47,182 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-fpi/res2o.c[588,601] [2021-12-15 08:51:47,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:51:47,203 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:51:47,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47 WrapperNode [2021-12-15 08:51:47,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:51:47,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:51:47,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:51:47,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:51:47,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,235 INFO L137 Inliner]: procedures = 17, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2021-12-15 08:51:47,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:51:47,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:51:47,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:51:47,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:51:47,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:51:47,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:51:47,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:51:47,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:51:47,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (1/1) ... [2021-12-15 08:51:47,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:51:47,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:51:47,322 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) [2021-12-15 08:51:47,333 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 [2021-12-15 08:51:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:51:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:51:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:51:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:51:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:51:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:51:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:51:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:51:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:51:47,413 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:51:47,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:51:47,536 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:51:47,541 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:51:47,542 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-15 08:51:47,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:51:47 BoogieIcfgContainer [2021-12-15 08:51:47,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:51:47,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:51:47,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:51:47,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:51:47,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:51:47" (1/3) ... [2021-12-15 08:51:47,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7f3662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:51:47, skipping insertion in model container [2021-12-15 08:51:47,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:47" (2/3) ... [2021-12-15 08:51:47,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7f3662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:51:47, skipping insertion in model container [2021-12-15 08:51:47,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:51:47" (3/3) ... [2021-12-15 08:51:47,550 INFO L111 eAbstractionObserver]: Analyzing ICFG res2o.c [2021-12-15 08:51:47,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:51:47,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:51:47,618 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:51:47,637 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 [2021-12-15 08:51:47,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:51:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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) [2021-12-15 08:51:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:51:47,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:51:47,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:51:47,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:51:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:51:47,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2021-12-15 08:51:47,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:51:47,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119964742] [2021-12-15 08:51:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:51:47,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:51:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:51:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:51:47,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:51:47,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119964742] [2021-12-15 08:51:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119964742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:51:47,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:51:47,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:51:47,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971373502] [2021-12-15 08:51:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:51:47,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:51:47,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:51:47,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:51:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:51:47,881 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:51:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:51:47,899 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2021-12-15 08:51:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:51:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 08:51:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:51:47,908 INFO L225 Difference]: With dead ends: 56 [2021-12-15 08:51:47,908 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 08:51:47,911 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 [2021-12-15 08:51:47,917 INFO L933 BasicCegarLoop]: 36 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, 36 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 [2021-12-15 08:51:47,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:51:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 08:51:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-15 08:51:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2021-12-15 08:51:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-15 08:51:47,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2021-12-15 08:51:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:51:47,943 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-15 08:51:47,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:51:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-15 08:51:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:51:47,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:51:47,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:51:47,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:51:47,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:51:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:51:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2021-12-15 08:51:47,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:51:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918247110] [2021-12-15 08:51:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:51:47,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:51:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:51:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:51:48,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:51:48,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918247110] [2021-12-15 08:51:48,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918247110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:51:48,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:51:48,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:51:48,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313297368] [2021-12-15 08:51:48,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:51:48,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:51:48,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:51:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:51:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:51:48,054 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:51:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:51:48,122 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-15 08:51:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:51:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 08:51:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:51:48,124 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:51:48,124 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:51:48,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:51:48,126 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:51:48,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:51:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:51:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-15 08:51:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2021-12-15 08:51:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-15 08:51:48,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2021-12-15 08:51:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:51:48,134 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-15 08:51:48,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:51:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-15 08:51:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:51:48,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:51:48,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:51:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:51:48,136 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:51:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:51:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2021-12-15 08:51:48,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:51:48,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003940796] [2021-12-15 08:51:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:51:48,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:51:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:51:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:51:49,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:51:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003940796] [2021-12-15 08:51:49,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003940796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:51:49,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106550423] [2021-12-15 08:51:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:51:49,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:51:49,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:51:49,499 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) [2021-12-15 08:51:49,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:51:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:51:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 08:51:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:51:49,749 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-15 08:51:49,751 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 40 treesize of output 34 [2021-12-15 08:51:49,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:51:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-15 08:51:50,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-15 08:51:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-12-15 08:51:50,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 46 [2021-12-15 08:51:50,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-12-15 08:51:51,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2021-12-15 08:51:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2021-12-15 08:51:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:51:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:52:00,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:00,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:00,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:52:01,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106550423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:52:01,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:52:01,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2021-12-15 08:52:01,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684812412] [2021-12-15 08:52:01,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:52:01,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 08:52:01,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:52:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 08:52:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1369, Unknown=3, NotChecked=0, Total=1640 [2021-12-15 08:52:01,017 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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) [2021-12-15 08:52:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:52:02,406 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-12-15 08:52:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 08:52:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 08:52:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:52:02,410 INFO L225 Difference]: With dead ends: 71 [2021-12-15 08:52:02,410 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 08:52:02,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=510, Invalid=2243, Unknown=3, NotChecked=0, Total=2756 [2021-12-15 08:52:02,412 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:52:02,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 123 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 165 Invalid, 0 Unknown, 308 Unchecked, 0.2s Time] [2021-12-15 08:52:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 08:52:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2021-12-15 08:52:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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) [2021-12-15 08:52:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-12-15 08:52:02,420 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2021-12-15 08:52:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:52:02,421 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-12-15 08:52:02,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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) [2021-12-15 08:52:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-12-15 08:52:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 08:52:02,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:52:02,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:52:02,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:52:02,648 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 [2021-12-15 08:52:02,649 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:52:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:52:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2021-12-15 08:52:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:52:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014026044] [2021-12-15 08:52:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:52:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:52:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:52:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:52:02,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:52:02,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014026044] [2021-12-15 08:52:02,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014026044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:52:02,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122753533] [2021-12-15 08:52:02,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:52:02,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:52:02,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:52:02,762 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) [2021-12-15 08:52:02,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:52:02,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:52:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:52:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:52:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:52:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:52:02,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:52:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:52:02,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122753533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:52:02,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:52:02,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:52:02,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802152764] [2021-12-15 08:52:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:52:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:52:02,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:52:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:52:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:52:02,993 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-12-15 08:52:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:52:03,202 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-12-15 08:52:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:52:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) Word has length 33 [2021-12-15 08:52:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:52:03,204 INFO L225 Difference]: With dead ends: 116 [2021-12-15 08:52:03,204 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 08:52:03,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:52:03,206 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:52:03,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 40 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:52:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 08:52:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-12-15 08:52:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 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) [2021-12-15 08:52:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-15 08:52:03,214 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 33 [2021-12-15 08:52:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:52:03,214 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-15 08:52:03,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-12-15 08:52:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-15 08:52:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:52:03,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:52:03,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:52:03,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:52:03,431 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 [2021-12-15 08:52:03,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:52:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:52:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash -284383476, now seen corresponding path program 3 times [2021-12-15 08:52:03,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:52:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614796964] [2021-12-15 08:52:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:52:03,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:52:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:52:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 08:52:03,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:52:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614796964] [2021-12-15 08:52:03,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614796964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:52:03,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819749554] [2021-12-15 08:52:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:52:03,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:52:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:52:03,531 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) [2021-12-15 08:52:03,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:52:03,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 08:52:03,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:52:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:52:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:52:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 08:52:03,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:52:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 08:52:03,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819749554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:52:03,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:52:03,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:52:03,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767310825] [2021-12-15 08:52:03,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:52:03,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:52:03,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:52:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:52:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:52:03,809 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2021-12-15 08:52:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:52:03,943 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-15 08:52:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:52:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 08:52:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:52:03,945 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:52:03,945 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 08:52:03,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-15 08:52:03,952 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:52:03,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 33 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:52:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 08:52:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-12-15 08:52:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-12-15 08:52:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-12-15 08:52:03,958 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2021-12-15 08:52:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:52:03,959 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-12-15 08:52:03,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2021-12-15 08:52:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-12-15 08:52:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 08:52:03,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:52:03,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:52:03,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:52:04,163 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 [2021-12-15 08:52:04,164 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:52:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:52:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2021-12-15 08:52:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:52:04,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757811894] [2021-12-15 08:52:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:52:04,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:52:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:52:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:52:07,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:52:07,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757811894] [2021-12-15 08:52:07,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757811894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:52:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898322497] [2021-12-15 08:52:07,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:52:07,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:52:07,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:52:07,160 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) [2021-12-15 08:52:07,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:52:07,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:52:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:52:07,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-15 08:52:07,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:52:07,259 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 11 treesize of output 7 [2021-12-15 08:52:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 08:52:07,278 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 23 treesize of output 19 [2021-12-15 08:52:07,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:52:07,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-15 08:52:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:07,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-15 08:52:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2021-12-15 08:52:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-12-15 08:52:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:08,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 74 [2021-12-15 08:52:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:09,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 86 [2021-12-15 08:52:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2021-12-15 08:52:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:09,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:09,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 86 [2021-12-15 08:52:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2021-12-15 08:52:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:52:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 86 [2021-12-15 08:52:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:11,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:11,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2021-12-15 08:52:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:52:12,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2021-12-15 08:52:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:52:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates...