./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/dll-reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8f03aacd6a0ba176a4c5bf885e9983ba429f85c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/forester-heap/dll-reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c8f03aacd6a0ba176a4c5bf885e9983ba429f85c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:13:23,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:13:23,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:13:23,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:13:23,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:13:23,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:13:23,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:13:23,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:13:23,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:13:23,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:13:23,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:13:23,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:13:23,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:13:23,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:13:23,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:13:23,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:13:23,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:13:23,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:13:23,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:13:23,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:13:23,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:13:23,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:13:23,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:13:23,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:13:23,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:13:23,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:13:23,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:13:23,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:13:23,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:13:23,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:13:23,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:13:23,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:13:23,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:13:23,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:13:23,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:13:23,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:13:23,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:13:23,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:13:23,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:13:23,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:13:23,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:13:23,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:13:23,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:13:23,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:13:23,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:13:23,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:13:23,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:13:23,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:13:23,465 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:13:23,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:13:23,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:13:23,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:13:23,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:13:23,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:13:23,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:13:23,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:13:23,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:13:23,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:13:23,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:13:23,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:13:23,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:13:23,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:13:23,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:13:23,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:13:23,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:13:23,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:13:23,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:13:23,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:13:23,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:13:23,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:13:23,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:13:23,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:13:23,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f03aacd6a0ba176a4c5bf885e9983ba429f85c [2021-08-26 02:13:23,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:13:23,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:13:23,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:13:23,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:13:23,734 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:13:23,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-08-26 02:13:23,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7923e161d/7090a25dcc2748d38eba2d2a977bfa32/FLAGcad5cfb28 [2021-08-26 02:13:24,133 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:13:24,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-08-26 02:13:24,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7923e161d/7090a25dcc2748d38eba2d2a977bfa32/FLAGcad5cfb28 [2021-08-26 02:13:24,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7923e161d/7090a25dcc2748d38eba2d2a977bfa32 [2021-08-26 02:13:24,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:13:24,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:13:24,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:13:24,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:13:24,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:13:24,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88c9eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24, skipping insertion in model container [2021-08-26 02:13:24,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:13:24,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:13:24,803 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-08-26 02:13:24,806 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-08-26 02:13:24,812 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-08-26 02:13:24,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:13:24,825 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:13:24,854 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-08-26 02:13:24,857 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-08-26 02:13:24,865 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-08-26 02:13:24,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:13:24,889 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:13:24,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24 WrapperNode [2021-08-26 02:13:24,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:13:24,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:13:24,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:13:24,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:13:24,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:13:24,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:13:24,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:13:24,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:13:24,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:13:24,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:13:24,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:13:24,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:13:24,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (1/1) ... [2021-08-26 02:13:24,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:13:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:24,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 02:13:24,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:13:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:13:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:13:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:13:24,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:13:25,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:13:25,350 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-26 02:13:25,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:25 BoogieIcfgContainer [2021-08-26 02:13:25,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:13:25,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:13:25,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:13:25,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:13:25,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:13:24" (1/3) ... [2021-08-26 02:13:25,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f9ed32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:25, skipping insertion in model container [2021-08-26 02:13:25,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:13:24" (2/3) ... [2021-08-26 02:13:25,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f9ed32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:13:25, skipping insertion in model container [2021-08-26 02:13:25,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:13:25" (3/3) ... [2021-08-26 02:13:25,356 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-08-26 02:13:25,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:13:25,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 02:13:25,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:13:25,398 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:13:25,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 02:13:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:13:25,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:25,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:25,412 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1813527409, now seen corresponding path program 1 times [2021-08-26 02:13:25,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:25,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265894119] [2021-08-26 02:13:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:25,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:25,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265894119] [2021-08-26 02:13:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265894119] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:25,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:13:25,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730709327] [2021-08-26 02:13:25,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:13:25,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:13:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:13:25,588 INFO L87 Difference]: Start difference. First operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:25,601 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2021-08-26 02:13:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:13:25,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-26 02:13:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:25,608 INFO L225 Difference]: With dead ends: 70 [2021-08-26 02:13:25,608 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 02:13:25,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:13:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 02:13:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-26 02:13:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-08-26 02:13:25,635 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 7 [2021-08-26 02:13:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-08-26 02:13:25,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-08-26 02:13:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:13:25,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:25,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:25,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:13:25,637 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:25,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1038813004, now seen corresponding path program 1 times [2021-08-26 02:13:25,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:25,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521925834] [2021-08-26 02:13:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:25,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:25,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:25,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521925834] [2021-08-26 02:13:25,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521925834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:25,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:25,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:13:25,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165232486] [2021-08-26 02:13:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:13:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:13:25,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:25,753 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:25,914 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2021-08-26 02:13:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:13:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-08-26 02:13:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:25,915 INFO L225 Difference]: With dead ends: 71 [2021-08-26 02:13:25,915 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 02:13:25,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:13:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 02:13:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-08-26 02:13:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-08-26 02:13:25,924 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 10 [2021-08-26 02:13:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:25,924 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-08-26 02:13:25,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-08-26 02:13:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:13:25,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:25,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:25,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:13:25,926 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1038754672, now seen corresponding path program 1 times [2021-08-26 02:13:25,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755549361] [2021-08-26 02:13:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:25,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:25,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755549361] [2021-08-26 02:13:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755549361] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:25,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:25,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:13:25,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643941027] [2021-08-26 02:13:25,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:13:25,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:13:25,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:13:25,988 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:26,057 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-08-26 02:13:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:13:26,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-08-26 02:13:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:26,059 INFO L225 Difference]: With dead ends: 64 [2021-08-26 02:13:26,059 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 02:13:26,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 02:13:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-26 02:13:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-08-26 02:13:26,072 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 10 [2021-08-26 02:13:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:26,072 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-08-26 02:13:26,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-08-26 02:13:26,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:13:26,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:26,073 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:26,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:13:26,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:26,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1414194791, now seen corresponding path program 1 times [2021-08-26 02:13:26,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:26,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117442929] [2021-08-26 02:13:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:26,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:13:26,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:26,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117442929] [2021-08-26 02:13:26,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117442929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:26,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463381193] [2021-08-26 02:13:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:26,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:26,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:26,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:26,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:13:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 02:13:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:26,479 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 32 treesize of output 24 [2021-08-26 02:13:26,482 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 21 treesize of output 13 [2021-08-26 02:13:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:13:26,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463381193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:26,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:26,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 02:13:26,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878151214] [2021-08-26 02:13:26,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 02:13:26,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 02:13:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:13:26,522 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:26,666 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-08-26 02:13:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 02:13:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 18 [2021-08-26 02:13:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:26,670 INFO L225 Difference]: With dead ends: 50 [2021-08-26 02:13:26,670 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 02:13:26,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:13:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 02:13:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-08-26 02:13:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-08-26 02:13:26,679 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 18 [2021-08-26 02:13:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:26,679 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-08-26 02:13:26,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-08-26 02:13:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 02:13:26,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:26,680 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:26,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:26,895 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1635066921, now seen corresponding path program 1 times [2021-08-26 02:13:26,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:26,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557293025] [2021-08-26 02:13:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:26,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:26,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:26,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557293025] [2021-08-26 02:13:26,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557293025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:26,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063520571] [2021-08-26 02:13:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:26,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:27,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:27,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:13:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:27,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 02:13:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:27,096 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 6 treesize of output 5 [2021-08-26 02:13:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:27,296 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:13:27,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 45 [2021-08-26 02:13:27,304 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:13:27,304 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 54 treesize of output 54 [2021-08-26 02:13:27,446 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-08-26 02:13:27,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-08-26 02:13:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:27,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063520571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:27,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:27,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-26 02:13:27,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069738929] [2021-08-26 02:13:27,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:13:27,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:13:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:13:27,484 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:27,991 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2021-08-26 02:13:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:13:27,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 20 [2021-08-26 02:13:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:27,993 INFO L225 Difference]: With dead ends: 114 [2021-08-26 02:13:27,993 INFO L226 Difference]: Without dead ends: 104 [2021-08-26 02:13:27,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:13:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-26 02:13:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 55. [2021-08-26 02:13:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-08-26 02:13:27,998 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 20 [2021-08-26 02:13:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:27,998 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-08-26 02:13:27,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-08-26 02:13:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 02:13:27,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:27,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:28,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:28,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:28,215 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1979842005, now seen corresponding path program 1 times [2021-08-26 02:13:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:28,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880633575] [2021-08-26 02:13:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:28,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:13:28,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:28,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880633575] [2021-08-26 02:13:28,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880633575] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:28,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:28,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:13:28,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982236093] [2021-08-26 02:13:28,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:13:28,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:13:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:13:28,273 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:28,369 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2021-08-26 02:13:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:13:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) Word has length 20 [2021-08-26 02:13:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:28,369 INFO L225 Difference]: With dead ends: 75 [2021-08-26 02:13:28,370 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 02:13:28,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:13:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 02:13:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-08-26 02:13:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-08-26 02:13:28,375 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 20 [2021-08-26 02:13:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:28,376 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-08-26 02:13:28,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-08-26 02:13:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:13:28,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:28,376 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:28,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 02:13:28,377 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 742290787, now seen corresponding path program 2 times [2021-08-26 02:13:28,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:28,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476674215] [2021-08-26 02:13:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:28,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:28,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:28,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476674215] [2021-08-26 02:13:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476674215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:28,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138379824] [2021-08-26 02:13:28,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:13:28,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:28,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:28,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 02:13:28,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:13:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:13:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-26 02:13:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:28,662 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 6 treesize of output 5 [2021-08-26 02:13:28,781 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 [2021-08-26 02:13:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:28,888 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:13:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 108 [2021-08-26 02:13:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:28,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:28,961 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-08-26 02:13:28,961 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 4 case distinctions, treesize of input 98 treesize of output 109 [2021-08-26 02:13:28,976 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:13:28,976 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 88 treesize of output 88 [2021-08-26 02:13:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:29,172 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-08-26 02:13:29,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 86 [2021-08-26 02:13:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:29,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:29,191 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-08-26 02:13:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 56 [2021-08-26 02:13:29,262 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-26 02:13:29,262 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 1 case distinctions, treesize of input 95 treesize of output 95 [2021-08-26 02:13:29,280 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-26 02:13:29,281 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 1 case distinctions, treesize of input 87 treesize of output 87 [2021-08-26 02:13:29,303 INFO L354 Elim1Store]: treesize reduction 102, result has 24.4 percent of original size [2021-08-26 02:13:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 80 [2021-08-26 02:13:29,325 INFO L354 Elim1Store]: treesize reduction 114, result has 22.4 percent of original size [2021-08-26 02:13:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 67 [2021-08-26 02:13:29,419 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 57 treesize of output 45 [2021-08-26 02:13:29,421 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 45 treesize of output 29 [2021-08-26 02:13:29,423 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 25 treesize of output 13 [2021-08-26 02:13:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:29,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138379824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:29,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:29,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-26 02:13:29,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701110959] [2021-08-26 02:13:29,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:13:29,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:13:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:13:29,431 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:29,869 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2021-08-26 02:13:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 02:13:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 02:13:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:29,871 INFO L225 Difference]: With dead ends: 97 [2021-08-26 02:13:29,871 INFO L226 Difference]: Without dead ends: 95 [2021-08-26 02:13:29,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:13:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-26 02:13:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2021-08-26 02:13:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-08-26 02:13:29,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 21 [2021-08-26 02:13:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:29,876 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-08-26 02:13:29,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-08-26 02:13:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:13:29,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:29,877 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:29,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:30,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:30,093 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash 742292709, now seen corresponding path program 1 times [2021-08-26 02:13:30,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:30,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799251148] [2021-08-26 02:13:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:30,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 02:13:30,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:30,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799251148] [2021-08-26 02:13:30,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799251148] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:13:30,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:13:30,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:13:30,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569476073] [2021-08-26 02:13:30,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:13:30,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:13:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:13:30,121 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:30,131 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-08-26 02:13:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:13:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) Word has length 21 [2021-08-26 02:13:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:30,132 INFO L225 Difference]: With dead ends: 76 [2021-08-26 02:13:30,132 INFO L226 Difference]: Without dead ends: 74 [2021-08-26 02:13:30,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:13:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-26 02:13:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-08-26 02:13:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-08-26 02:13:30,137 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 21 [2021-08-26 02:13:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:30,137 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-08-26 02:13:30,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-08-26 02:13:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 02:13:30,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:30,138 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-26 02:13:30,138 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:30,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1163965591, now seen corresponding path program 3 times [2021-08-26 02:13:30,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:30,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392517650] [2021-08-26 02:13:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:30,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:30,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:30,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392517650] [2021-08-26 02:13:30,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392517650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:30,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062699536] [2021-08-26 02:13:30,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:13:30,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:30,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:30,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 02:13:30,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:13:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:13:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-26 02:13:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:30,496 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 6 treesize of output 5 [2021-08-26 02:13:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:30,671 INFO L354 Elim1Store]: treesize reduction 642, result has 7.2 percent of original size [2021-08-26 02:13:30,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 185 [2021-08-26 02:13:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:30,688 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:13:30,690 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 1 case distinctions, treesize of input 86 treesize of output 66 [2021-08-26 02:13:30,699 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:13:30,699 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 66 [2021-08-26 02:13:30,805 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:13:30,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 91 [2021-08-26 02:13:30,818 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-08-26 02:13:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 75 [2021-08-26 02:13:30,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:13:30,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 45 [2021-08-26 02:13:30,864 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:13:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2021-08-26 02:13:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062699536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:30,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:30,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-26 02:13:30,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552084955] [2021-08-26 02:13:30,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:13:30,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:13:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:13:30,900 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:31,402 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2021-08-26 02:13:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 02:13:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 22 [2021-08-26 02:13:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:31,402 INFO L225 Difference]: With dead ends: 120 [2021-08-26 02:13:31,402 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 02:13:31,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:13:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 02:13:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-08-26 02:13:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2021-08-26 02:13:31,408 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 22 [2021-08-26 02:13:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:31,408 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2021-08-26 02:13:31,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2021-08-26 02:13:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 02:13:31,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:31,411 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:31,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:31,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1210245850, now seen corresponding path program 1 times [2021-08-26 02:13:31,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:31,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944230183] [2021-08-26 02:13:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:31,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:31,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:31,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944230183] [2021-08-26 02:13:31,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944230183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:31,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038003597] [2021-08-26 02:13:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:31,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:31,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:31,883 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:31,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 02:13:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-26 02:13:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:32,049 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 6 treesize of output 5 [2021-08-26 02:13:32,136 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-08-26 02:13:32,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 220 [2021-08-26 02:13:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,181 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:13:32,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 68 [2021-08-26 02:13:32,188 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:13:32,189 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 81 treesize of output 81 [2021-08-26 02:13:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,855 INFO L354 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2021-08-26 02:13:32,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 90 [2021-08-26 02:13:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:32,870 INFO L354 Elim1Store]: treesize reduction 71, result has 13.4 percent of original size [2021-08-26 02:13:32,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 84 [2021-08-26 02:13:32,911 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 [2021-08-26 02:13:32,987 INFO L354 Elim1Store]: treesize reduction 132, result has 19.5 percent of original size [2021-08-26 02:13:32,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2021-08-26 02:13:32,997 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-08-26 02:13:32,997 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 158 treesize of output 153 [2021-08-26 02:13:33,022 INFO L354 Elim1Store]: treesize reduction 122, result has 21.8 percent of original size [2021-08-26 02:13:33,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 142 [2021-08-26 02:13:33,328 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-08-26 02:13:33,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 140 [2021-08-26 02:13:33,333 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-08-26 02:13:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 106 [2021-08-26 02:13:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:33,344 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:13:33,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 76 [2021-08-26 02:13:33,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 65 [2021-08-26 02:13:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,408 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:13:33,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2021-08-26 02:13:33,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:33,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-08-26 02:13:33,488 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 43 treesize of output 35 [2021-08-26 02:13:33,498 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-08-26 02:13:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 24 [2021-08-26 02:13:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:33,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038003597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:33,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:33,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-26 02:13:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428344736] [2021-08-26 02:13:33,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 02:13:33,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 02:13:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:13:33,506 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:34,543 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-08-26 02:13:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:13:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-26 02:13:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:34,544 INFO L225 Difference]: With dead ends: 147 [2021-08-26 02:13:34,544 INFO L226 Difference]: Without dead ends: 145 [2021-08-26 02:13:34,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:13:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-26 02:13:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-08-26 02:13:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-08-26 02:13:34,549 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 23 [2021-08-26 02:13:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:34,550 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-08-26 02:13:34,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-08-26 02:13:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 02:13:34,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:34,550 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:34,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:34,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 02:13:34,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1965376375, now seen corresponding path program 2 times [2021-08-26 02:13:34,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:34,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498051795] [2021-08-26 02:13:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:34,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:34,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:34,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498051795] [2021-08-26 02:13:34,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498051795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:34,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481085431] [2021-08-26 02:13:34,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:13:34,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:34,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:34,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:34,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 02:13:35,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:13:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:13:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 02:13:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:35,184 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 6 treesize of output 5 [2021-08-26 02:13:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:35,265 INFO L354 Elim1Store]: treesize reduction 149, result has 17.2 percent of original size [2021-08-26 02:13:35,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 120 [2021-08-26 02:13:35,300 INFO L354 Elim1Store]: treesize reduction 180, result has 15.1 percent of original size [2021-08-26 02:13:35,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 90 [2021-08-26 02:13:35,312 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-08-26 02:13:35,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 94 [2021-08-26 02:13:35,808 INFO L354 Elim1Store]: treesize reduction 770, result has 11.8 percent of original size [2021-08-26 02:13:35,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 500 treesize of output 350 [2021-08-26 02:13:35,975 INFO L354 Elim1Store]: treesize reduction 1425, result has 8.2 percent of original size [2021-08-26 02:13:35,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 602 treesize of output 542 [2021-08-26 02:13:36,010 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-08-26 02:13:36,011 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 545 treesize of output 555 [2021-08-26 02:13:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:38,500 INFO L354 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2021-08-26 02:13:38,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 53 [2021-08-26 02:13:38,613 INFO L354 Elim1Store]: treesize reduction 114, result has 18.0 percent of original size [2021-08-26 02:13:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 279 treesize of output 199 [2021-08-26 02:13:42,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:42,616 INFO L354 Elim1Store]: treesize reduction 121, result has 6.2 percent of original size [2021-08-26 02:13:42,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 159 [2021-08-26 02:13:43,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:43,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:43,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:43,671 INFO L354 Elim1Store]: treesize reduction 152, result has 9.0 percent of original size [2021-08-26 02:13:43,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 127 treesize of output 85 [2021-08-26 02:13:43,886 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-08-26 02:13:43,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 136 [2021-08-26 02:13:43,890 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 118 treesize of output 110 [2021-08-26 02:13:44,167 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-08-26 02:13:44,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 43 [2021-08-26 02:13:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:44,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481085431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:44,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:13:44,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-26 02:13:44,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568849337] [2021-08-26 02:13:44,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 02:13:44,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:13:44,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 02:13:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:13:44,198 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:13:57,325 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-08-26 02:13:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 02:13:57,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 24 [2021-08-26 02:13:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:13:57,326 INFO L225 Difference]: With dead ends: 158 [2021-08-26 02:13:57,327 INFO L226 Difference]: Without dead ends: 130 [2021-08-26 02:13:57,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1614.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1362, Unknown=1, NotChecked=0, Total=1722 [2021-08-26 02:13:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-26 02:13:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2021-08-26 02:13:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-08-26 02:13:57,333 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 24 [2021-08-26 02:13:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:13:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-08-26 02:13:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:13:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-08-26 02:13:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 02:13:57,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:13:57,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:13:57,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:13:57,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:57,535 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:13:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:13:57,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1564160201, now seen corresponding path program 3 times [2021-08-26 02:13:57,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:13:57,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815007836] [2021-08-26 02:13:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:13:57,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:13:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:13:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:13:57,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:13:57,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815007836] [2021-08-26 02:13:57,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815007836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:13:57,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140577044] [2021-08-26 02:13:57,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:13:57,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:13:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:13:57,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:13:57,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 02:13:58,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:13:58,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:13:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-26 02:13:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:13:58,616 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 6 treesize of output 5 [2021-08-26 02:13:58,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:58,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:58,686 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-08-26 02:13:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 142 [2021-08-26 02:13:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:58,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:58,712 INFO L354 Elim1Store]: treesize reduction 138, result has 13.8 percent of original size [2021-08-26 02:13:58,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 62 [2021-08-26 02:13:58,728 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:13:58,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-08-26 02:13:58,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:58,925 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-08-26 02:13:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 546 treesize of output 356 [2021-08-26 02:13:58,929 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 540 treesize of output 528 [2021-08-26 02:13:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:58,953 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-08-26 02:13:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 202 treesize of output 164 [2021-08-26 02:13:58,962 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-26 02:13:58,962 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 155 treesize of output 149 [2021-08-26 02:13:59,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:59,415 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:13:59,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 129 [2021-08-26 02:13:59,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:59,425 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-08-26 02:13:59,425 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 164 treesize of output 163 [2021-08-26 02:13:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:59,433 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-08-26 02:13:59,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 156 [2021-08-26 02:13:59,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:59,559 INFO L354 Elim1Store]: treesize reduction 246, result has 12.8 percent of original size [2021-08-26 02:13:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 232 treesize of output 169 [2021-08-26 02:13:59,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:59,579 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-08-26 02:13:59,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 162 [2021-08-26 02:13:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:13:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:13:59,614 INFO L354 Elim1Store]: treesize reduction 230, result has 16.1 percent of original size [2021-08-26 02:13:59,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 154 [2021-08-26 02:13:59,851 INFO L354 Elim1Store]: treesize reduction 296, result has 10.8 percent of original size [2021-08-26 02:13:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 435 treesize of output 243 [2021-08-26 02:13:59,939 INFO L354 Elim1Store]: treesize reduction 568, result has 8.4 percent of original size [2021-08-26 02:13:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 369 treesize of output 255 [2021-08-26 02:13:59,997 INFO L354 Elim1Store]: treesize reduction 706, result has 8.7 percent of original size [2021-08-26 02:13:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 261 treesize of output 223 [2021-08-26 02:14:02,141 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-08-26 02:14:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 375 treesize of output 210 [2021-08-26 02:14:02,162 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-08-26 02:14:02,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 90 [2021-08-26 02:14:02,179 INFO L354 Elim1Store]: treesize reduction 109, result has 7.6 percent of original size [2021-08-26 02:14:02,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 49 [2021-08-26 02:14:02,243 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-08-26 02:14:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 54 [2021-08-26 02:14:02,256 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-08-26 02:14:02,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 39 [2021-08-26 02:14:02,362 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-08-26 02:14:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 31 [2021-08-26 02:14:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:02,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140577044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:02,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:14:02,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-26 02:14:02,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633740211] [2021-08-26 02:14:02,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:14:02,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:14:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:14:02,370 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-08-26 02:14:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:06,622 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2021-08-26 02:14:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:14:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 26 [2021-08-26 02:14:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:06,623 INFO L225 Difference]: With dead ends: 162 [2021-08-26 02:14:06,623 INFO L226 Difference]: Without dead ends: 152 [2021-08-26 02:14:06,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2654.7ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-08-26 02:14:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-26 02:14:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 93. [2021-08-26 02:14:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 92 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2021-08-26 02:14:06,630 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 26 [2021-08-26 02:14:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:06,631 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2021-08-26 02:14:06,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-08-26 02:14:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2021-08-26 02:14:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:14:06,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:06,632 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:14:06,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:14:06,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:14:06,832 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:06,832 INFO L82 PathProgramCache]: Analyzing trace with hash 350497813, now seen corresponding path program 4 times [2021-08-26 02:14:06,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:06,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325473329] [2021-08-26 02:14:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:06,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:07,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:07,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325473329] [2021-08-26 02:14:07,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325473329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:07,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142214646] [2021-08-26 02:14:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:14:07,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:14:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:14:07,104 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:14:07,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:14:08,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:14:08,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:14:08,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-26 02:14:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:14:08,874 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 6 treesize of output 5 [2021-08-26 02:14:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:08,954 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-08-26 02:14:08,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 142 [2021-08-26 02:14:08,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:08,989 INFO L354 Elim1Store]: treesize reduction 186, result has 12.3 percent of original size [2021-08-26 02:14:08,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 78 [2021-08-26 02:14:09,001 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-08-26 02:14:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-08-26 02:14:09,191 INFO L354 Elim1Store]: treesize reduction 448, result has 7.4 percent of original size [2021-08-26 02:14:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 485 treesize of output 315 [2021-08-26 02:14:09,217 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-08-26 02:14:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 187 treesize of output 149 [2021-08-26 02:14:09,225 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-26 02:14:09,225 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 140 treesize of output 134 [2021-08-26 02:14:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:09,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:09,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:09,598 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:14:09,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 109 [2021-08-26 02:14:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:09,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:09,606 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:14:09,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 103 [2021-08-26 02:14:09,701 INFO L354 Elim1Store]: treesize reduction 246, result has 12.8 percent of original size [2021-08-26 02:14:09,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 140 [2021-08-26 02:14:09,736 INFO L354 Elim1Store]: treesize reduction 302, result has 16.6 percent of original size [2021-08-26 02:14:09,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 158 [2021-08-26 02:14:09,855 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-08-26 02:14:09,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 163 treesize of output 129 [2021-08-26 02:14:09,881 INFO L354 Elim1Store]: treesize reduction 172, result has 17.7 percent of original size [2021-08-26 02:14:09,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 142 treesize of output 130 [2021-08-26 02:14:09,969 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-08-26 02:14:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 147 treesize of output 126 [2021-08-26 02:14:09,994 INFO L354 Elim1Store]: treesize reduction 116, result has 15.9 percent of original size [2021-08-26 02:14:09,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 134 treesize of output 111 [2021-08-26 02:14:10,084 INFO L354 Elim1Store]: treesize reduction 57, result has 12.3 percent of original size [2021-08-26 02:14:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 77 [2021-08-26 02:14:10,100 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-26 02:14:10,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 37 [2021-08-26 02:14:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:10,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142214646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:10,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:14:10,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-26 02:14:10,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442632879] [2021-08-26 02:14:10,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 02:14:10,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 02:14:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:14:10,152 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:11,234 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2021-08-26 02:14:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:14:11,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 02:14:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:11,235 INFO L225 Difference]: With dead ends: 161 [2021-08-26 02:14:11,235 INFO L226 Difference]: Without dead ends: 127 [2021-08-26 02:14:11,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:14:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-26 02:14:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-08-26 02:14:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 98 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-08-26 02:14:11,242 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 27 [2021-08-26 02:14:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:11,242 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-08-26 02:14:11,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-08-26 02:14:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:14:11,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:11,243 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:14:11,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:14:11,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 02:14:11,464 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash 639440383, now seen corresponding path program 1 times [2021-08-26 02:14:11,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:11,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879678157] [2021-08-26 02:14:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:11,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:11,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:11,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879678157] [2021-08-26 02:14:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879678157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:11,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334265908] [2021-08-26 02:14:11,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:11,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:14:11,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:14:11,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:14:11,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 02:14:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-26 02:14:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:14:12,008 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 6 treesize of output 5 [2021-08-26 02:14:12,174 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-08-26 02:14:12,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 220 [2021-08-26 02:14:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:12,201 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:14:12,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 68 [2021-08-26 02:14:12,207 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:14:12,207 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 81 treesize of output 81 [2021-08-26 02:14:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:14:12,396 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-08-26 02:14:12,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 110 [2021-08-26 02:14:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:12,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:14:12,414 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-08-26 02:14:12,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 92 [2021-08-26 02:14:12,543 INFO L354 Elim1Store]: treesize reduction 91, result has 28.9 percent of original size [2021-08-26 02:14:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 124 [2021-08-26 02:14:12,585 INFO L354 Elim1Store]: treesize reduction 138, result has 19.8 percent of original size [2021-08-26 02:14:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 125 treesize of output 134 [2021-08-26 02:14:12,840 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-26 02:14:12,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 52 [2021-08-26 02:14:12,849 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-26 02:14:12,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 26 [2021-08-26 02:14:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:12,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334265908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:12,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:14:12,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-26 02:14:12,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590815909] [2021-08-26 02:14:12,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:14:12,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:14:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:14:12,860 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:15,957 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2021-08-26 02:14:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 02:14:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 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 28 [2021-08-26 02:14:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:15,958 INFO L225 Difference]: With dead ends: 183 [2021-08-26 02:14:15,958 INFO L226 Difference]: Without dead ends: 169 [2021-08-26 02:14:15,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 02:14:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-26 02:14:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 111. [2021-08-26 02:14:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 110 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-08-26 02:14:15,965 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 28 [2021-08-26 02:14:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:15,966 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-08-26 02:14:15,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-08-26 02:14:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:14:15,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:15,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:14:15,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 02:14:16,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 02:14:16,173 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash 696698685, now seen corresponding path program 1 times [2021-08-26 02:14:16,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:16,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876542769] [2021-08-26 02:14:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:16,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 02:14:16,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:16,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876542769] [2021-08-26 02:14:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876542769] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:14:16,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:14:16,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:14:16,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942588274] [2021-08-26 02:14:16,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:14:16,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:14:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:14:16,210 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:16,281 INFO L93 Difference]: Finished difference Result 142 states and 173 transitions. [2021-08-26 02:14:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:14:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 02:14:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:16,283 INFO L225 Difference]: With dead ends: 142 [2021-08-26 02:14:16,283 INFO L226 Difference]: Without dead ends: 120 [2021-08-26 02:14:16,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:14:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-26 02:14:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-08-26 02:14:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 109 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2021-08-26 02:14:16,293 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 28 [2021-08-26 02:14:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:16,293 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2021-08-26 02:14:16,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2021-08-26 02:14:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:14:16,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:16,294 INFO L512 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] [2021-08-26 02:14:16,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-26 02:14:16,294 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash 303671675, now seen corresponding path program 1 times [2021-08-26 02:14:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:16,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486452363] [2021-08-26 02:14:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:16,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:16,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:16,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486452363] [2021-08-26 02:14:16,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486452363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:16,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637886670] [2021-08-26 02:14:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:16,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:14:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:14:16,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:14:16,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 02:14:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-26 02:14:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:14:16,953 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 6 treesize of output 5 [2021-08-26 02:14:17,065 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 [2021-08-26 02:14:17,203 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-08-26 02:14:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 526 treesize of output 427 [2021-08-26 02:14:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,254 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:14:17,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 135 [2021-08-26 02:14:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,307 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-08-26 02:14:17,308 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 4 case distinctions, treesize of input 133 treesize of output 144 [2021-08-26 02:14:17,315 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:14:17,316 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 123 treesize of output 123 [2021-08-26 02:14:17,578 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-08-26 02:14:17,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 120 [2021-08-26 02:14:17,582 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-08-26 02:14:17,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 95 [2021-08-26 02:14:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,604 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-08-26 02:14:17,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 68 [2021-08-26 02:14:17,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 71 [2021-08-26 02:14:17,686 INFO L354 Elim1Store]: treesize reduction 39, result has 27.8 percent of original size [2021-08-26 02:14:17,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 60 [2021-08-26 02:14:17,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,697 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-08-26 02:14:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 47 [2021-08-26 02:14:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-08-26 02:14:17,829 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 41 treesize of output 33 [2021-08-26 02:14:17,830 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 30 treesize of output 18 [2021-08-26 02:14:17,851 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 15 treesize of output 7 [2021-08-26 02:14:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:17,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637886670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:17,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:14:17,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-26 02:14:17,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788038558] [2021-08-26 02:14:17,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:14:17,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:17,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:14:17,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:14:17,858 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-26 02:14:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:18,363 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-08-26 02:14:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 02:14:18,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) Word has length 28 [2021-08-26 02:14:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:18,365 INFO L225 Difference]: With dead ends: 162 [2021-08-26 02:14:18,365 INFO L226 Difference]: Without dead ends: 149 [2021-08-26 02:14:18,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-08-26 02:14:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-26 02:14:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2021-08-26 02:14:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2032520325203253) internal successors, (148), 123 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-08-26 02:14:18,374 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 28 [2021-08-26 02:14:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:18,374 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-08-26 02:14:18,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-26 02:14:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-08-26 02:14:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:14:18,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:18,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:14:18,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:14:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 02:14:18,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2028717346, now seen corresponding path program 1 times [2021-08-26 02:14:18,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:18,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352358333] [2021-08-26 02:14:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:18,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 02:14:18,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:18,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352358333] [2021-08-26 02:14:18,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352358333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:14:18,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:14:18,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:14:18,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053181520] [2021-08-26 02:14:18,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:14:18,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:14:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:14:18,630 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:18,682 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2021-08-26 02:14:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:14:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 02:14:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:18,683 INFO L225 Difference]: With dead ends: 169 [2021-08-26 02:14:18,683 INFO L226 Difference]: Without dead ends: 137 [2021-08-26 02:14:18,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:14:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-26 02:14:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-08-26 02:14:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 136 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2021-08-26 02:14:18,691 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 28 [2021-08-26 02:14:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:18,691 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2021-08-26 02:14:18,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2021-08-26 02:14:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:14:18,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:18,692 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:14:18,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-26 02:14:18,693 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:18,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1348658976, now seen corresponding path program 1 times [2021-08-26 02:14:18,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:18,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95578000] [2021-08-26 02:14:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:18,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:14:18,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:18,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95578000] [2021-08-26 02:14:18,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95578000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:18,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730966391] [2021-08-26 02:14:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:18,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:14:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:14:18,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:14:18,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 02:14:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:19,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 02:14:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:14:19,333 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 6 treesize of output 5 [2021-08-26 02:14:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:19,411 INFO L354 Elim1Store]: treesize reduction 642, result has 7.2 percent of original size [2021-08-26 02:14:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 185 [2021-08-26 02:14:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:19,421 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:14:19,421 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 1 case distinctions, treesize of input 86 treesize of output 66 [2021-08-26 02:14:19,427 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:14:19,427 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 66 [2021-08-26 02:14:19,805 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-08-26 02:14:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 128 [2021-08-26 02:14:19,814 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-26 02:14:19,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 79 [2021-08-26 02:14:19,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:14:19,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2021-08-26 02:14:19,833 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-08-26 02:14:19,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 46 [2021-08-26 02:14:19,836 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 37 treesize of output 27 [2021-08-26 02:14:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:14:19,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730966391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:19,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:14:19,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-26 02:14:19,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35650252] [2021-08-26 02:14:19,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:14:19,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:14:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:14:19,862 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:14:23,889 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2021-08-26 02:14:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:14:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 28 [2021-08-26 02:14:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:14:23,890 INFO L225 Difference]: With dead ends: 173 [2021-08-26 02:14:23,890 INFO L226 Difference]: Without dead ends: 151 [2021-08-26 02:14:23,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:14:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-26 02:14:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-08-26 02:14:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 146 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-08-26 02:14:23,899 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 28 [2021-08-26 02:14:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:14:23,899 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-08-26 02:14:23,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:14:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-08-26 02:14:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:14:23,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:14:23,900 INFO L512 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] [2021-08-26 02:14:23,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 02:14:24,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 02:14:24,121 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:14:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:14:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1255132700, now seen corresponding path program 1 times [2021-08-26 02:14:24,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:14:24,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64684778] [2021-08-26 02:14:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:24,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:14:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:24,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:14:24,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64684778] [2021-08-26 02:14:24,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64684778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:24,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576769527] [2021-08-26 02:14:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:14:24,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:14:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:14:24,281 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:14:24,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 02:14:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:14:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 02:14:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:14:24,892 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 6 treesize of output 5 [2021-08-26 02:14:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:24,952 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:14:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 51 [2021-08-26 02:14:24,963 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-08-26 02:14:24,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-08-26 02:14:25,673 INFO L354 Elim1Store]: treesize reduction 102, result has 29.2 percent of original size [2021-08-26 02:14:25,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 76 [2021-08-26 02:14:26,057 INFO L354 Elim1Store]: treesize reduction 907, result has 12.2 percent of original size [2021-08-26 02:14:26,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 289 treesize of output 226 [2021-08-26 02:14:26,073 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-08-26 02:14:26,073 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 345 treesize of output 355 [2021-08-26 02:14:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:14:27,578 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-08-26 02:14:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 213 treesize of output 191 [2021-08-26 02:14:34,692 INFO L354 Elim1Store]: treesize reduction 78, result has 25.7 percent of original size [2021-08-26 02:14:34,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 90 [2021-08-26 02:14:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:14:34,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576769527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:14:34,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:14:34,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-26 02:14:34,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729842067] [2021-08-26 02:14:34,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:14:34,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:14:34,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:14:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=217, Unknown=4, NotChecked=0, Total=272 [2021-08-26 02:14:34,721 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2021-08-26 02:16:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:16:12,868 INFO L93 Difference]: Finished difference Result 201 states and 230 transitions. [2021-08-26 02:16:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:16:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) Word has length 28 [2021-08-26 02:16:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:16:12,869 INFO L225 Difference]: With dead ends: 201 [2021-08-26 02:16:12,869 INFO L226 Difference]: Without dead ends: 187 [2021-08-26 02:16:12,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 34396.0ms TimeCoverageRelationStatistics Valid=208, Invalid=763, Unknown=21, NotChecked=0, Total=992 [2021-08-26 02:16:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-26 02:16:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 159. [2021-08-26 02:16:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1645569620253164) internal successors, (184), 158 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 184 transitions. [2021-08-26 02:16:12,879 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 184 transitions. Word has length 28 [2021-08-26 02:16:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:16:12,879 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 184 transitions. [2021-08-26 02:16:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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) [2021-08-26 02:16:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 184 transitions. [2021-08-26 02:16:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:16:12,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:12,880 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:16:12,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-26 02:16:13,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:13,081 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:16:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:16:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1010437212, now seen corresponding path program 5 times [2021-08-26 02:16:13,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:16:13,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148403048] [2021-08-26 02:16:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:16:13,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:16:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:16:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:13,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:16:13,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148403048] [2021-08-26 02:16:13,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148403048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:16:13,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790422737] [2021-08-26 02:16:13,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:16:13,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:16:13,377 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:16:13,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 02:16:15,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 02:16:15,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:16:15,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-26 02:16:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:16:15,466 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 6 treesize of output 5 [2021-08-26 02:16:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:15,532 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-08-26 02:16:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 142 [2021-08-26 02:16:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:15,560 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-08-26 02:16:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 65 [2021-08-26 02:16:15,571 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:16:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-08-26 02:16:15,759 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-08-26 02:16:15,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 195 [2021-08-26 02:16:15,818 INFO L354 Elim1Store]: treesize reduction 428, result has 9.3 percent of original size [2021-08-26 02:16:15,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 163 treesize of output 129 [2021-08-26 02:16:15,836 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-08-26 02:16:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-08-26 02:16:16,105 INFO L354 Elim1Store]: treesize reduction 549, result has 9.7 percent of original size [2021-08-26 02:16:16,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 307 treesize of output 178 [2021-08-26 02:16:16,225 INFO L354 Elim1Store]: treesize reduction 1432, result has 6.8 percent of original size [2021-08-26 02:16:16,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 18 case distinctions, treesize of input 326 treesize of output 276 [2021-08-26 02:16:16,242 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-08-26 02:16:16,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 261 treesize of output 289 [2021-08-26 02:16:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:17,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:17,211 INFO L354 Elim1Store]: treesize reduction 151, result has 4.4 percent of original size [2021-08-26 02:16:17,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 303 treesize of output 170 [2021-08-26 02:16:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:17,240 INFO L354 Elim1Store]: treesize reduction 343, result has 5.2 percent of original size [2021-08-26 02:16:17,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 284 treesize of output 286 [2021-08-26 02:16:17,431 INFO L354 Elim1Store]: treesize reduction 422, result has 10.6 percent of original size [2021-08-26 02:16:17,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 343 treesize of output 201 [2021-08-26 02:16:17,496 INFO L354 Elim1Store]: treesize reduction 462, result has 12.5 percent of original size [2021-08-26 02:16:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 211 treesize of output 219 [2021-08-26 02:16:17,986 INFO L354 Elim1Store]: treesize reduction 242, result has 17.4 percent of original size [2021-08-26 02:16:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 315 treesize of output 194 [2021-08-26 02:16:18,047 INFO L354 Elim1Store]: treesize reduction 598, result has 13.2 percent of original size [2021-08-26 02:16:18,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 317 treesize of output 323 [2021-08-26 02:16:18,435 INFO L354 Elim1Store]: treesize reduction 238, result has 14.4 percent of original size [2021-08-26 02:16:18,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 329 treesize of output 173 [2021-08-26 02:16:18,446 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-08-26 02:16:18,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 192 treesize of output 140 [2021-08-26 02:16:18,578 INFO L354 Elim1Store]: treesize reduction 92, result has 12.4 percent of original size [2021-08-26 02:16:18,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 67 [2021-08-26 02:16:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:18,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790422737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:16:18,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:16:18,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-26 02:16:18,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783419068] [2021-08-26 02:16:18,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 02:16:18,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:16:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 02:16:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:16:18,620 INFO L87 Difference]: Start difference. First operand 159 states and 184 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:16:25,337 INFO L93 Difference]: Finished difference Result 286 states and 332 transitions. [2021-08-26 02:16:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:16:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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 28 [2021-08-26 02:16:25,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:16:25,339 INFO L225 Difference]: With dead ends: 286 [2021-08-26 02:16:25,339 INFO L226 Difference]: Without dead ends: 261 [2021-08-26 02:16:25,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 02:16:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-26 02:16:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 178. [2021-08-26 02:16:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1694915254237288) internal successors, (207), 177 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2021-08-26 02:16:25,351 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 28 [2021-08-26 02:16:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:16:25,351 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2021-08-26 02:16:25,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2021-08-26 02:16:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:16:25,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:25,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:16:25,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 02:16:25,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-08-26 02:16:25,559 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:16:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:16:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1849231824, now seen corresponding path program 2 times [2021-08-26 02:16:25,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:16:25,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320756290] [2021-08-26 02:16:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:16:25,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:16:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:16:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:25,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:16:25,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320756290] [2021-08-26 02:16:25,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320756290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:16:25,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223240151] [2021-08-26 02:16:25,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:16:25,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:16:25,698 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:16:25,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 02:16:26,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:16:26,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:16:26,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-26 02:16:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:16:26,442 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 6 treesize of output 5 [2021-08-26 02:16:26,532 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-08-26 02:16:26,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 226 [2021-08-26 02:16:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:26,561 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:16:26,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 74 [2021-08-26 02:16:26,572 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-08-26 02:16:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 95 [2021-08-26 02:16:27,708 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-08-26 02:16:27,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 111 [2021-08-26 02:16:27,734 INFO L354 Elim1Store]: treesize reduction 144, result has 20.0 percent of original size [2021-08-26 02:16:27,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 115 [2021-08-26 02:16:28,256 INFO L354 Elim1Store]: treesize reduction 1065, result has 10.1 percent of original size [2021-08-26 02:16:28,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 591 treesize of output 422 [2021-08-26 02:16:28,486 INFO L354 Elim1Store]: treesize reduction 1284, result has 9.1 percent of original size [2021-08-26 02:16:28,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 787 treesize of output 590 [2021-08-26 02:16:28,508 INFO L354 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2021-08-26 02:16:28,508 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 735 treesize of output 749 [2021-08-26 02:16:32,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:32,699 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-08-26 02:16:32,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 1465 treesize of output 1113 [2021-08-26 02:16:33,645 INFO L354 Elim1Store]: treesize reduction 92, result has 30.8 percent of original size [2021-08-26 02:16:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 1425 treesize of output 925 [2021-08-26 02:16:40,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:16:40,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:16:40,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 02:16:40,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002187503] [2021-08-26 02:16:40,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 02:16:40,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:16:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 02:16:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:16:40,409 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:16:40,839 INFO L93 Difference]: Finished difference Result 221 states and 256 transitions. [2021-08-26 02:16:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:16:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 29 [2021-08-26 02:16:40,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:16:40,840 INFO L225 Difference]: With dead ends: 221 [2021-08-26 02:16:40,840 INFO L226 Difference]: Without dead ends: 207 [2021-08-26 02:16:40,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 841.1ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-26 02:16:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-26 02:16:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 179. [2021-08-26 02:16:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1685393258426966) internal successors, (208), 178 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 208 transitions. [2021-08-26 02:16:40,852 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 208 transitions. Word has length 29 [2021-08-26 02:16:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:16:40,852 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 208 transitions. [2021-08-26 02:16:40,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 208 transitions. [2021-08-26 02:16:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:16:40,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:40,853 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:16:40,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 02:16:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:41,064 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:16:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:16:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1441361008, now seen corresponding path program 6 times [2021-08-26 02:16:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:16:41,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154157224] [2021-08-26 02:16:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:16:41,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:16:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:16:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:41,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:16:41,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154157224] [2021-08-26 02:16:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154157224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:16:41,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326842097] [2021-08-26 02:16:41,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:16:41,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:16:41,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:16:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 02:16:43,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-26 02:16:43,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:16:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-26 02:16:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:16:43,479 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 6 treesize of output 5 [2021-08-26 02:16:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:43,553 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-08-26 02:16:43,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 142 [2021-08-26 02:16:43,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:43,584 INFO L354 Elim1Store]: treesize reduction 186, result has 12.3 percent of original size [2021-08-26 02:16:43,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 78 [2021-08-26 02:16:43,597 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-08-26 02:16:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-08-26 02:16:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:43,817 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-08-26 02:16:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 195 [2021-08-26 02:16:43,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:43,894 INFO L354 Elim1Store]: treesize reduction 520, result has 9.1 percent of original size [2021-08-26 02:16:43,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 161 [2021-08-26 02:16:43,913 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-08-26 02:16:43,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 159 [2021-08-26 02:16:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:44,254 INFO L354 Elim1Store]: treesize reduction 706, result has 6.6 percent of original size [2021-08-26 02:16:44,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 792 treesize of output 395 [2021-08-26 02:16:44,260 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 657 treesize of output 649 [2021-08-26 02:16:44,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:44,307 INFO L354 Elim1Store]: treesize reduction 352, result has 14.6 percent of original size [2021-08-26 02:16:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 263 treesize of output 219 [2021-08-26 02:16:44,318 INFO L354 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2021-08-26 02:16:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2021-08-26 02:16:45,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:45,019 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:16:45,019 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 227 treesize of output 226 [2021-08-26 02:16:45,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:45,035 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-08-26 02:16:45,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 223 treesize of output 163 [2021-08-26 02:16:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:45,049 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-08-26 02:16:45,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 249 treesize of output 251 [2021-08-26 02:16:45,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:45,258 INFO L354 Elim1Store]: treesize reduction 378, result has 11.7 percent of original size [2021-08-26 02:16:45,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 317 treesize of output 207 [2021-08-26 02:16:45,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:45,282 INFO L354 Elim1Store]: treesize reduction 150, result has 16.2 percent of original size [2021-08-26 02:16:45,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 276 [2021-08-26 02:16:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:45,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:45,361 INFO L354 Elim1Store]: treesize reduction 582, result has 14.4 percent of original size [2021-08-26 02:16:45,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 270 treesize of output 274 [2021-08-26 02:16:45,724 INFO L354 Elim1Store]: treesize reduction 980, result has 9.1 percent of original size [2021-08-26 02:16:45,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 29 case distinctions, treesize of input 303 treesize of output 313 [2021-08-26 02:16:45,850 INFO L354 Elim1Store]: treesize reduction 496, result has 9.8 percent of original size [2021-08-26 02:16:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 29 case distinctions, treesize of input 285 treesize of output 204 [2021-08-26 02:16:45,900 INFO L354 Elim1Store]: treesize reduction 534, result has 9.3 percent of original size [2021-08-26 02:16:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 231 [2021-08-26 02:16:46,106 INFO L354 Elim1Store]: treesize reduction 312, result has 12.8 percent of original size [2021-08-26 02:16:46,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 280 treesize of output 232 [2021-08-26 02:16:46,166 INFO L354 Elim1Store]: treesize reduction 362, result has 10.8 percent of original size [2021-08-26 02:16:46,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 287 treesize of output 241 [2021-08-26 02:16:46,182 INFO L354 Elim1Store]: treesize reduction 99, result has 8.3 percent of original size [2021-08-26 02:16:46,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 209 treesize of output 191 [2021-08-26 02:16:46,197 INFO L354 Elim1Store]: treesize reduction 99, result has 8.3 percent of original size [2021-08-26 02:16:46,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 164 [2021-08-26 02:16:46,360 INFO L354 Elim1Store]: treesize reduction 99, result has 3.9 percent of original size [2021-08-26 02:16:46,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 196 treesize of output 144 [2021-08-26 02:16:46,375 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-08-26 02:16:46,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 117 [2021-08-26 02:16:46,389 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-08-26 02:16:46,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 102 [2021-08-26 02:16:46,398 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-08-26 02:16:46,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 63 [2021-08-26 02:16:46,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:46,484 INFO L354 Elim1Store]: treesize reduction 117, result has 7.1 percent of original size [2021-08-26 02:16:46,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 46 [2021-08-26 02:16:46,600 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-08-26 02:16:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 31 [2021-08-26 02:16:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:46,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326842097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:16:46,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:16:46,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-26 02:16:46,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114754762] [2021-08-26 02:16:46,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:16:46,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:16:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:16:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-08-26 02:16:46,609 INFO L87 Difference]: Start difference. First operand 179 states and 208 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2021-08-26 02:16:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:16:49,014 INFO L93 Difference]: Finished difference Result 315 states and 365 transitions. [2021-08-26 02:16:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 02:16:49,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) Word has length 29 [2021-08-26 02:16:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:16:49,015 INFO L225 Difference]: With dead ends: 315 [2021-08-26 02:16:49,016 INFO L226 Difference]: Without dead ends: 302 [2021-08-26 02:16:49,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1208.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 02:16:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-26 02:16:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 181. [2021-08-26 02:16:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1722222222222223) internal successors, (211), 180 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2021-08-26 02:16:49,029 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 29 [2021-08-26 02:16:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:16:49,029 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2021-08-26 02:16:49,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2021-08-26 02:16:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2021-08-26 02:16:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:16:49,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:49,030 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-26 02:16:49,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-26 02:16:49,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:49,245 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:16:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:16:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1208531812, now seen corresponding path program 3 times [2021-08-26 02:16:49,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:16:49,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268293106] [2021-08-26 02:16:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:16:49,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:16:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:16:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:49,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:16:49,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268293106] [2021-08-26 02:16:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268293106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:16:49,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167329959] [2021-08-26 02:16:49,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:16:49,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:16:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:16:49,590 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:16:49,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 02:16:51,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:16:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:16:51,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 81 conjunts are in the unsatisfiable core [2021-08-26 02:16:51,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:16:51,129 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 6 treesize of output 5 [2021-08-26 02:16:51,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:16:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:51,214 INFO L354 Elim1Store]: treesize reduction 544, result has 9.3 percent of original size [2021-08-26 02:16:51,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 226 [2021-08-26 02:16:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:51,246 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:16:51,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 74 [2021-08-26 02:16:51,258 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-08-26 02:16:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 95 [2021-08-26 02:16:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:52,473 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-08-26 02:16:52,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 111 [2021-08-26 02:16:52,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:52,506 INFO L354 Elim1Store]: treesize reduction 144, result has 20.0 percent of original size [2021-08-26 02:16:52,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 115 [2021-08-26 02:16:52,561 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 [2021-08-26 02:16:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:16:54,211 INFO L354 Elim1Store]: treesize reduction 1065, result has 10.1 percent of original size [2021-08-26 02:16:54,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 787 treesize of output 570 [2021-08-26 02:16:54,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-08-26 02:16:54,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:16:54,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-08-26 02:16:54,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424795407] [2021-08-26 02:16:54,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:16:54,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:16:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:16:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-26 02:16:54,219 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2021-08-26 02:16:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:16:54,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 02:16:54,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-26 02:16:54,420 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@39ae0450 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-26 02:16:54,424 INFO L168 Benchmark]: Toolchain (without parser) took 209896.17 ms. Allocated memory was 67.1 MB in the beginning and 474.0 MB in the end (delta: 406.8 MB). Free memory was 47.1 MB in the beginning and 127.8 MB in the end (delta: -80.8 MB). Peak memory consumption was 325.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:16:54,424 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 49.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:16:54,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.36 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 44.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:16:54,425 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.13 ms. Allocated memory is still 67.1 MB. Free memory was 44.2 MB in the beginning and 42.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:16:54,425 INFO L168 Benchmark]: Boogie Preprocessor took 18.96 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 40.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:16:54,425 INFO L168 Benchmark]: RCFGBuilder took 404.48 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 40.1 MB in the beginning and 50.4 MB in the end (delta: -10.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:16:54,425 INFO L168 Benchmark]: TraceAbstraction took 209071.51 ms. Allocated memory was 86.0 MB in the beginning and 474.0 MB in the end (delta: 388.0 MB). Free memory was 50.1 MB in the beginning and 127.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 309.5 MB. Max. memory is 16.1 GB. [2021-08-26 02:16:54,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 49.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.36 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 44.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.13 ms. Allocated memory is still 67.1 MB. Free memory was 44.2 MB in the beginning and 42.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.96 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 40.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 404.48 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 40.1 MB in the beginning and 50.4 MB in the end (delta: -10.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 209071.51 ms. Allocated memory was 86.0 MB in the beginning and 474.0 MB in the end (delta: 388.0 MB). Free memory was 50.1 MB in the beginning and 127.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 309.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@39ae0450 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@39ae0450: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-26 02:16:54,630 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-26 02:16:54,734 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 137 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:16:56,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:16:56,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:16:56,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:16:56,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:16:56,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:16:56,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:16:56,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:16:56,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:16:56,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:16:56,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:16:56,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:16:56,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:16:56,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:16:56,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:16:56,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:16:56,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:16:56,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:16:56,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:16:56,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:16:56,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:16:56,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:16:56,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:16:56,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:16:56,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:16:56,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:16:56,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:16:56,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:16:56,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:16:56,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:16:56,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:16:56,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:16:56,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:16:56,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:16:56,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:16:56,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:16:56,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:16:56,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:16:56,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:16:56,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:16:56,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:16:56,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 02:16:56,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:16:56,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:16:56,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:16:56,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:16:56,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:16:56,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:16:56,691 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:16:56,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:16:56,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:16:56,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:16:56,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:16:56,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:16:56,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:16:56,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:16:56,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:16:56,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:16:56,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:16:56,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:16:56,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:16:56,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 02:16:56,700 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f03aacd6a0ba176a4c5bf885e9983ba429f85c [2021-08-26 02:16:56,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:16:56,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:16:56,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:16:56,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:16:56,968 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:16:56,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-08-26 02:16:57,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578317614/302e14c6dee1428bab3b84750e1d38dd/FLAGf8331fe21 [2021-08-26 02:16:57,469 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:16:57,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-08-26 02:16:57,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578317614/302e14c6dee1428bab3b84750e1d38dd/FLAGf8331fe21 [2021-08-26 02:16:57,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578317614/302e14c6dee1428bab3b84750e1d38dd [2021-08-26 02:16:57,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:16:57,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:16:57,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:16:57,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:16:57,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:16:57,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:16:57" (1/1) ... [2021-08-26 02:16:57,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1578c7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:57, skipping insertion in model container [2021-08-26 02:16:57,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:16:57" (1/1) ... [2021-08-26 02:16:57,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:16:57,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:16:58,134 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-08-26 02:16:58,138 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-08-26 02:16:58,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-08-26 02:16:58,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:16:58,165 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:16:58,195 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-08-26 02:16:58,196 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-08-26 02:16:58,199 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-08-26 02:16:58,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:16:58,223 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:16:58,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58 WrapperNode [2021-08-26 02:16:58,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:16:58,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:16:58,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:16:58,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:16:58,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:16:58,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:16:58,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:16:58,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:16:58,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:16:58,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:16:58,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:16:58,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:16:58,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (1/1) ... [2021-08-26 02:16:58,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:16:58,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:16:58,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 02:16:58,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 02:16:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 02:16:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:16:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:16:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:16:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:16:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:16:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 02:16:58,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 02:16:58,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:16:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:16:58,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:16:58,911 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-26 02:16:58,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:16:58 BoogieIcfgContainer [2021-08-26 02:16:58,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:16:58,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:16:58,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:16:58,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:16:58,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:16:57" (1/3) ... [2021-08-26 02:16:58,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7816d1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:16:58, skipping insertion in model container [2021-08-26 02:16:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:16:58" (2/3) ... [2021-08-26 02:16:58,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7816d1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:16:58, skipping insertion in model container [2021-08-26 02:16:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:16:58" (3/3) ... [2021-08-26 02:16:58,919 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-08-26 02:16:58,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:16:58,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 02:16:58,955 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:16:58,959 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:16:58,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 02:16:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:16:58,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:58,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:16:58,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:16:58,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:16:58,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1808873062, now seen corresponding path program 1 times [2021-08-26 02:16:58,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:16:58,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846155679] [2021-08-26 02:16:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:16:59,000 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:16:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:16:59,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:16:59,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 02:16:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:16:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 02:16:59,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:16:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:59,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:16:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:59,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:16:59,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846155679] [2021-08-26 02:16:59,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846155679] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:16:59,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:16:59,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 02:16:59,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094838937] [2021-08-26 02:16:59,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:16:59,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:16:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:16:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:16:59,174 INFO L87 Difference]: Start difference. First operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:16:59,188 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2021-08-26 02:16:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:16:59,189 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-26 02:16:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:16:59,195 INFO L225 Difference]: With dead ends: 67 [2021-08-26 02:16:59,195 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 02:16:59,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:16:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 02:16:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-26 02:16:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 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) [2021-08-26 02:16:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-08-26 02:16:59,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-08-26 02:16:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:16:59,220 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-08-26 02:16:59,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-08-26 02:16:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 02:16:59,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:59,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:16:59,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:16:59,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:16:59,432 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:16:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:16:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash 239687661, now seen corresponding path program 1 times [2021-08-26 02:16:59,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:16:59,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41422816] [2021-08-26 02:16:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:16:59,435 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:16:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:16:59,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:16:59,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 02:16:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:16:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:16:59,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:16:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:59,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:16:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:16:59,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:16:59,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41422816] [2021-08-26 02:16:59,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41422816] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:16:59,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:16:59,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-26 02:16:59,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985736539] [2021-08-26 02:16:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:16:59,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:16:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:16:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:16:59,615 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:16:59,800 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-08-26 02:16:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:16:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-26 02:16:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:16:59,801 INFO L225 Difference]: With dead ends: 54 [2021-08-26 02:16:59,801 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:16:59,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:16:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:16:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-08-26 02:16:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-08-26 02:16:59,806 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 8 [2021-08-26 02:16:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:16:59,806 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-08-26 02:16:59,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:16:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-08-26 02:16:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 02:16:59,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:16:59,807 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:16:59,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:17:00,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:17:00,010 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:17:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1200905122, now seen corresponding path program 1 times [2021-08-26 02:17:00,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:17:00,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014499100] [2021-08-26 02:17:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:00,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:17:00,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:17:00,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:17:00,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 02:17:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:17:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:00,230 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 32 treesize of output 24 [2021-08-26 02:17:00,233 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 21 treesize of output 13 [2021-08-26 02:17:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:00,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:17:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:00,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:17:00,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014499100] [2021-08-26 02:17:00,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014499100] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:17:00,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:17:00,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 02:17:00,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817992675] [2021-08-26 02:17:00,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 02:17:00,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:17:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 02:17:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:17:00,426 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:01,026 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-08-26 02:17:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 02:17:01,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 02:17:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:01,027 INFO L225 Difference]: With dead ends: 35 [2021-08-26 02:17:01,028 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 02:17:01,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:17:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 02:17:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-08-26 02:17:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-08-26 02:17:01,032 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-08-26 02:17:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:01,032 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-08-26 02:17:01,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-08-26 02:17:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:17:01,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:01,033 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:01,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:17:01,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:17:01,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:17:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 825424614, now seen corresponding path program 1 times [2021-08-26 02:17:01,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:17:01,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197688422] [2021-08-26 02:17:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:01,239 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:17:01,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:17:01,240 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:17:01,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 02:17:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 02:17:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:01,411 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 6 treesize of output 5 [2021-08-26 02:17:06,213 INFO L354 Elim1Store]: treesize reduction 328, result has 15.7 percent of original size [2021-08-26 02:17:06,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 151 treesize of output 136 [2021-08-26 02:17:06,233 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:17:06,233 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 169 treesize of output 169 [2021-08-26 02:17:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:10,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:17:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 50 [2021-08-26 02:17:11,369 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-08-26 02:17:11,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-08-26 02:17:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:17:12,835 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-08-26 02:17:12,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 8 case distinctions, treesize of input 150 treesize of output 189 [2021-08-26 02:17:17,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:17,643 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-08-26 02:17:17,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-08-26 02:17:17,934 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-08-26 02:17:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 100 [2021-08-26 02:17:18,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:17:18,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197688422] [2021-08-26 02:17:18,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:17:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1462303024] [2021-08-26 02:17:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:18,150 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:17:18,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:17:18,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:17:18,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-08-26 02:17:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:17:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:18,338 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 6 treesize of output 5 [2021-08-26 02:17:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:18,557 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-08-26 02:17:18,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-08-26 02:17:18,567 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:17:18,568 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 59 treesize of output 59 [2021-08-26 02:17:18,721 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-08-26 02:17:18,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-08-26 02:17:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:18,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:17:19,000 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-08-26 02:17:19,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 8 case distinctions, treesize of input 152 treesize of output 191 [2021-08-26 02:17:19,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:19,722 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-08-26 02:17:19,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-08-26 02:17:19,978 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-08-26 02:17:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 100 [2021-08-26 02:17:20,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:17:20,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867681560] [2021-08-26 02:17:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:20,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:20,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:17:20,254 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:17:20,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 02:17:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 02:17:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:20,383 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 6 treesize of output 5 [2021-08-26 02:17:25,139 INFO L354 Elim1Store]: treesize reduction 328, result has 15.7 percent of original size [2021-08-26 02:17:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 148 treesize of output 133 [2021-08-26 02:17:25,156 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:17:25,156 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 166 treesize of output 166 [2021-08-26 02:17:27,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:27,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-08-26 02:17:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:27,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-08-26 02:17:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:27,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-08-26 02:17:27,512 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-08-26 02:17:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-08-26 02:17:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:27,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:17:29,126 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-08-26 02:17:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 8 case distinctions, treesize of input 149 treesize of output 188 [2021-08-26 02:17:31,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:31,881 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-08-26 02:17:31,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-08-26 02:17:32,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:32,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-08-26 02:17:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-08-26 02:17:32,453 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-26 02:17:32,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 42 [2021-08-26 02:17:32,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:32,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-08-26 02:17:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:32,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-08-26 02:17:32,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:17:32,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:17:32,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 02:17:32,791 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 02:17:32,792 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 02:17:32,795 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:17:32,796 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:17:32,796 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:17:32,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:17:33,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 02:17:33,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-08-26 02:17:33,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-08-26 02:17:33,401 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:17:33,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:17:33 BoogieIcfgContainer [2021-08-26 02:17:33,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:17:33,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:17:33,411 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:17:33,411 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:17:33,411 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:16:58" (3/4) ... [2021-08-26 02:17:33,413 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 02:17:33,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:17:33,414 INFO L168 Benchmark]: Toolchain (without parser) took 35586.99 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 33.5 MB in the beginning and 32.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:17:33,414 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 37.9 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:17:33,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.24 ms. Allocated memory is still 56.6 MB. Free memory was 33.3 MB in the beginning and 31.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:17:33,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.48 ms. Allocated memory is still 56.6 MB. Free memory was 31.3 MB in the beginning and 29.2 MB in the end (delta: 2.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:17:33,415 INFO L168 Benchmark]: Boogie Preprocessor took 44.24 ms. Allocated memory is still 56.6 MB. Free memory was 29.2 MB in the beginning and 27.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:17:33,415 INFO L168 Benchmark]: RCFGBuilder took 586.93 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 27.1 MB in the beginning and 40.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:17:33,415 INFO L168 Benchmark]: TraceAbstraction took 34496.73 ms. Allocated memory was 69.2 MB in the beginning and 100.7 MB in the end (delta: 31.5 MB). Free memory was 40.1 MB in the beginning and 32.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:17:33,415 INFO L168 Benchmark]: Witness Printer took 2.62 ms. Allocated memory is still 100.7 MB. Free memory is still 32.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:17:33,417 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 37.9 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.24 ms. Allocated memory is still 56.6 MB. Free memory was 33.3 MB in the beginning and 31.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.48 ms. Allocated memory is still 56.6 MB. Free memory was 31.3 MB in the beginning and 29.2 MB in the end (delta: 2.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.24 ms. Allocated memory is still 56.6 MB. Free memory was 29.2 MB in the beginning and 27.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 586.93 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 27.1 MB in the beginning and 40.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34496.73 ms. Allocated memory was 69.2 MB in the beginning and 100.7 MB in the end (delta: 31.5 MB). Free memory was 40.1 MB in the beginning and 32.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. * Witness Printer took 2.62 ms. Allocated memory is still 100.7 MB. Free memory is still 32.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L996] DLL* head = malloc(sizeof(DLL)); [L997] head->next = ((void*)0) [L998] head->prev = ((void*)0) [L999] head->data = 0 [L1001] DLL* x = head; [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x = head [L1008] EXPR x->next [L1008] COND FALSE !(x->next != ((void*)0) && __VERIFIER_nondet_int()) [L1013] COND FALSE !(!(x != ((void*)0))) [L1015] x->data = 1 [L1017] EXPR x->next [L1017] COND TRUE x->next == ((void*)0) [L1019] x->next = malloc(sizeof(DLL)) [L1019] EXPR x->next [L1019] x->next->prev = x [L1019] EXPR x->next [L1019] x = x->next [L1019] x->next = ((void*)0) [L1019] x->data = 2 [L1025] DLL* prev = ((void*)0); [L1026] x = head [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND FALSE !(x != ((void*)0)) [L1039] head = prev [L1042] x = head [L1043] COND TRUE x != ((void*)0) [L1045] EXPR x->data [L1045] int t1 = x->data; [L1046] int t2 = 0; [L1047] COND TRUE t1 == 2 [L1048] EXPR x->next [L1048] EXPR x->next->data [L1048] t2 = x->next->data [L1049] COND TRUE !(t1 != 2 || t2 == 1) [L1049] reach_error() - UnprovableResult [Line: 1010]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 34448.1ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 16.7ms, AutomataDifference: 830.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 86 SDtfs, 50 SDslu, 36 SDs, 0 SdLazy, 83 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 654.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 90.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 46.4ms SsaConstructionTime, 57.3ms SatisfiabilityAnalysisTime, 501.0ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 261 SizeOfPredicates, 3 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 02:17:33,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...