./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/nsqm.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e2af4d8739465a787d4a8047ac8d84cdc6a08c8b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/array-fpi/nsqm.c -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 e2af4d8739465a787d4a8047ac8d84cdc6a08c8b ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:25:04,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:25:04,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:25:04,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:25:04,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:25:04,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:25:04,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:25:04,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:25:04,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:25:04,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:25:04,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:25:04,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:25:04,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:25:04,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:25:04,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:25:04,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:25:04,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:25:04,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:25:04,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:25:04,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:25:04,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:25:04,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:25:04,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:25:04,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:25:04,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:25:04,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:25:04,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:25:04,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:25:04,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:25:04,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:25:04,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:25:04,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:25:04,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:25:04,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:25:04,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:25:04,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:25:04,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:25:04,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:25:04,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:25:04,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:25:04,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:25:04,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:25:04,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:25:04,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:25:04,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:25:04,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:25:04,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:25:04,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:25:04,617 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:25:04,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:25:04,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:25:04,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:25:04,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:25:04,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:25:04,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:25:04,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:25:04,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:25:04,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:25:04,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:25:04,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:25:04,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:25:04,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:25:04,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:25:04,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:25:04,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:25:04,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:25:04,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:25:04,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:25:04,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:25:04,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:25:04,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:25:04,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:25:04,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2af4d8739465a787d4a8047ac8d84cdc6a08c8b [2021-08-25 19:25:04,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:25:04,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:25:04,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:25:04,965 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:25:04,966 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:25:04,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2021-08-25 19:25:05,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a60b099a1/d64599a60396449daadba41acf0b876c/FLAG6161dc8bf [2021-08-25 19:25:05,469 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:25:05,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2021-08-25 19:25:05,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a60b099a1/d64599a60396449daadba41acf0b876c/FLAG6161dc8bf [2021-08-25 19:25:05,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a60b099a1/d64599a60396449daadba41acf0b876c [2021-08-25 19:25:05,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:25:05,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:25:05,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:25:05,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:25:05,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:25:05,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:25:05" (1/1) ... [2021-08-25 19:25:05,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f70386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:05, skipping insertion in model container [2021-08-25 19:25:05,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:25:05" (1/1) ... [2021-08-25 19:25:05,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:25:05,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:25:05,999 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2021-08-25 19:25:06,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:25:06,042 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:25:06,059 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2021-08-25 19:25:06,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:25:06,101 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:25:06,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06 WrapperNode [2021-08-25 19:25:06,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:25:06,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:25:06,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:25:06,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:25:06,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:25:06,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:25:06,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:25:06,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:25:06,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:25:06,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:25:06,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:25:06,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:25:06,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (1/1) ... [2021-08-25 19:25:06,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:25:06,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:06,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:25:06,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:25:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:25:06,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:25:06,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:25:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:25:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:25:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:25:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:25:06,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:25:06,634 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:25:06,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:25:06 BoogieIcfgContainer [2021-08-25 19:25:06,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:25:06,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:25:06,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:25:06,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:25:06,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:25:05" (1/3) ... [2021-08-25 19:25:06,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d6745e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:25:06, skipping insertion in model container [2021-08-25 19:25:06,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:06" (2/3) ... [2021-08-25 19:25:06,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d6745e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:25:06, skipping insertion in model container [2021-08-25 19:25:06,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:25:06" (3/3) ... [2021-08-25 19:25:06,641 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm.c [2021-08-25 19:25:06,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:25:06,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:25:06,704 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:25:06,711 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:25:06,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:25:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2021-08-25 19:25:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:25:06,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:06,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:06,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:25:06,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:06,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072569168] [2021-08-25 19:25:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:06,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:06,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:06,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072569168] [2021-08-25 19:25:06,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072569168] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:25:06,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:06,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:25:06,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718269953] [2021-08-25 19:25:06,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:25:06,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:06,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:25:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:25:06,941 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:06,969 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:25:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:25:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2021-08-25 19:25:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:06,976 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:25:06,977 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:25:06,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:25:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:25:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:25:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:25:07,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:25:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:07,006 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:25:07,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:25:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:25:07,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:07,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:07,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:25:07,012 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:25:07,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:07,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551548787] [2021-08-25 19:25:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:07,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:07,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:07,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523102812] [2021-08-25 19:25:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:07,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:07,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:07,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:07,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:25:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:25:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:07,205 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-08-25 19:25:07,206 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 29 treesize of output 25 [2021-08-25 19:25:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:07,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:07,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551548787] [2021-08-25 19:25:07,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:07,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523102812] [2021-08-25 19:25:07,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523102812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:25:07,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:07,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:25:07,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058368106] [2021-08-25 19:25:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:25:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:25:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:25:07,389 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:07,496 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-25 19:25:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:25:07,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-08-25 19:25:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:07,498 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:25:07,499 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 19:25:07,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:25:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 19:25:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-25 19:25:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:25:07,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:25:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:07,509 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:25:07,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:25:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:25:07,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:07,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:07,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:07,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:07,733 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:07,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:25:07,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:07,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657223679] [2021-08-25 19:25:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:07,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:07,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:07,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851327972] [2021-08-25 19:25:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:07,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:07,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:07,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:25:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:07,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:25:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:07,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:07,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657223679] [2021-08-25 19:25:07,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:07,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851327972] [2021-08-25 19:25:07,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851327972] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:25:07,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:07,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:25:07,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665098097] [2021-08-25 19:25:07,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:25:07,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:25:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:25:07,915 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:07,985 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-25 19:25:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:25:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-08-25 19:25:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:07,986 INFO L225 Difference]: With dead ends: 49 [2021-08-25 19:25:07,987 INFO L226 Difference]: Without dead ends: 40 [2021-08-25 19:25:07,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:25:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-25 19:25:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-25 19:25:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:25:07,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:25:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:07,991 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:25:07,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:25:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:25:07,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:07,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:08,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:08,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-25 19:25:08,209 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:08,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:25:08,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:08,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854357171] [2021-08-25 19:25:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:08,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:08,230 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:08,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627822213] [2021-08-25 19:25:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:08,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:08,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:08,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:08,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:25:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:25:08,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:08,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:08,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854357171] [2021-08-25 19:25:08,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:08,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627822213] [2021-08-25 19:25:08,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627822213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:08,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:08,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:25:08,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380779614] [2021-08-25 19:25:08,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:25:08,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:25:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:25:08,383 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:08,469 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-25 19:25:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:25:08,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-08-25 19:25:08,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:08,471 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:25:08,471 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:25:08,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:25:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:25:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-25 19:25:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-25 19:25:08,475 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-25 19:25:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:08,475 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-25 19:25:08,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-25 19:25:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:25:08,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:08,477 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:08,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:08,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:08,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:08,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:25:08,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:08,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944084257] [2021-08-25 19:25:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:08,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:08,707 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:08,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259976685] [2021-08-25 19:25:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:08,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:08,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:08,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:08,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:25:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 19:25:08,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:08,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:08,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944084257] [2021-08-25 19:25:08,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:08,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259976685] [2021-08-25 19:25:08,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259976685] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:25:08,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:08,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:25:08,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116795137] [2021-08-25 19:25:08,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:25:08,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:25:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:25:08,915 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:08,983 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-25 19:25:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:25:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2021-08-25 19:25:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:08,984 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:25:08,984 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:25:08,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:25:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:25:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-25 19:25:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-25 19:25:08,988 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-25 19:25:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:08,988 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-25 19:25:08,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-25 19:25:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:25:08,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:08,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:09,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:09,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:09,205 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:25:09,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:09,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446819605] [2021-08-25 19:25:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:09,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:09,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:09,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094801835] [2021-08-25 19:25:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:09,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:09,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:09,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 19:25:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:09,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:25:09,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:09,372 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 10 treesize of output 8 [2021-08-25 19:25:09,379 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 29 treesize of output 17 [2021-08-25 19:25:09,469 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-25 19:25:09,470 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 1 case distinctions, treesize of input 36 treesize of output 34 [2021-08-25 19:25:09,643 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-08-25 19:25:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 51 [2021-08-25 19:25:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:09,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:09,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446819605] [2021-08-25 19:25:09,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:09,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094801835] [2021-08-25 19:25:09,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094801835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:09,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:09,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:25:09,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062564501] [2021-08-25 19:25:09,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:25:09,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:25:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:25:09,903 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:10,306 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-08-25 19:25:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:25:10,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 16 [2021-08-25 19:25:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:10,307 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:25:10,307 INFO L226 Difference]: Without dead ends: 41 [2021-08-25 19:25:10,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:25:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-25 19:25:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-08-25 19:25:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-25 19:25:10,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-08-25 19:25:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:10,312 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-25 19:25:10,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-25 19:25:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:25:10,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:10,313 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:10,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:10,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:10,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-25 19:25:10,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:10,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655503737] [2021-08-25 19:25:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:10,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:10,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:10,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406977829] [2021-08-25 19:25:10,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:25:10,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:10,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 19:25:10,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:25:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:25:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:25:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:10,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655503737] [2021-08-25 19:25:10,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:10,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406977829] [2021-08-25 19:25:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406977829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:10,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:10,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:25:10,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997335173] [2021-08-25 19:25:10,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:25:10,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:25:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:25:10,772 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:10,888 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-08-25 19:25:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:25:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:25:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:10,890 INFO L225 Difference]: With dead ends: 65 [2021-08-25 19:25:10,890 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:25:10,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:25:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:25:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-08-25 19:25:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-08-25 19:25:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-08-25 19:25:10,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-08-25 19:25:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:10,897 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-08-25 19:25:10,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-08-25 19:25:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:25:10,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:10,897 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:10,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:11,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:11,113 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:11,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-08-25 19:25:11,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:11,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567883298] [2021-08-25 19:25:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:11,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:11,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:11,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882026834] [2021-08-25 19:25:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:25:11,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:11,132 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:11,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 19:25:11,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:25:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:25:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:25:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567883298] [2021-08-25 19:25:11,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:11,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882026834] [2021-08-25 19:25:11,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882026834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:11,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:11,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:25:11,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422014804] [2021-08-25 19:25:11,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:25:11,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:25:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:25:11,367 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:11,484 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-25 19:25:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:25:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:25:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:11,486 INFO L225 Difference]: With dead ends: 60 [2021-08-25 19:25:11,486 INFO L226 Difference]: Without dead ends: 53 [2021-08-25 19:25:11,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:25:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-25 19:25:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-25 19:25:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-25 19:25:11,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-08-25 19:25:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:11,501 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-25 19:25:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-25 19:25:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:25:11,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:11,502 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:11,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:11,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:11,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-08-25 19:25:11,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:11,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704133467] [2021-08-25 19:25:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:11,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:11,740 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:11,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344045049] [2021-08-25 19:25:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:25:11,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:11,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:11,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 19:25:11,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:25:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:25:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-25 19:25:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:11,998 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 10 treesize of output 8 [2021-08-25 19:25:12,004 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 29 treesize of output 17 [2021-08-25 19:25:12,184 INFO L354 Elim1Store]: treesize reduction 671, result has 14.7 percent of original size [2021-08-25 19:25:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 269 [2021-08-25 19:25:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 58 [2021-08-25 19:25:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 65 [2021-08-25 19:25:12,330 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-08-25 19:25:12,330 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 57 [2021-08-25 19:25:12,437 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-08-25 19:25:12,437 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 3 case distinctions, treesize of input 47 treesize of output 46 [2021-08-25 19:25:12,770 INFO L354 Elim1Store]: treesize reduction 843, result has 12.5 percent of original size [2021-08-25 19:25:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 268 treesize of output 481 [2021-08-25 19:25:12,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:12,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 209 [2021-08-25 19:25:12,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:25:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:13,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 192 [2021-08-25 19:25:13,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:13,069 INFO L354 Elim1Store]: treesize reduction 162, result has 1.8 percent of original size [2021-08-25 19:25:13,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 279 treesize of output 164 [2021-08-25 19:25:13,312 INFO L354 Elim1Store]: treesize reduction 285, result has 12.8 percent of original size [2021-08-25 19:25:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 78 [2021-08-25 19:25:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:13,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:13,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704133467] [2021-08-25 19:25:13,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:13,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344045049] [2021-08-25 19:25:13,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344045049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:13,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:13,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 19:25:13,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694637435] [2021-08-25 19:25:13,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:25:13,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:25:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:25:13,603 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:14,226 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-08-25 19:25:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 19:25:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 [2021-08-25 19:25:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:14,229 INFO L225 Difference]: With dead ends: 64 [2021-08-25 19:25:14,229 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 19:25:14,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-25 19:25:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 19:25:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-08-25 19:25:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 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) [2021-08-25 19:25:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-25 19:25:14,234 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-08-25 19:25:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:14,235 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-25 19:25:14,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-25 19:25:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:25:14,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:14,235 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:14,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:14,443 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,SelfDestructingSolverStorable8 [2021-08-25 19:25:14,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 5 times [2021-08-25 19:25:14,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:14,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598837137] [2021-08-25 19:25:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:14,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:14,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:14,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982488319] [2021-08-25 19:25:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 19:25:14,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:14,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:25:14,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 19:25:18,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-25 19:25:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:25:18,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:25:18,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:18,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:18,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598837137] [2021-08-25 19:25:18,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:18,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982488319] [2021-08-25 19:25:18,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982488319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:18,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:18,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:25:18,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932853442] [2021-08-25 19:25:18,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:25:18,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:25:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:25:18,562 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:18,694 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-08-25 19:25:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:25:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 [2021-08-25 19:25:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:18,695 INFO L225 Difference]: With dead ends: 97 [2021-08-25 19:25:18,696 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 19:25:18,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-25 19:25:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 19:25:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-08-25 19:25:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 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) [2021-08-25 19:25:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-25 19:25:18,703 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2021-08-25 19:25:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:18,703 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-25 19:25:18,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-25 19:25:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:25:18,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:18,704 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:18,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:18,909 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,SelfDestructingSolverStorable9 [2021-08-25 19:25:18,909 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:18,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 6 times [2021-08-25 19:25:18,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:18,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566990603] [2021-08-25 19:25:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:18,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:18,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:18,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817655906] [2021-08-25 19:25:18,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 19:25:18,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:18,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:18,938 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) [2021-08-25 19:25:18,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:25:19,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-25 19:25:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:25:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:25:19,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566990603] [2021-08-25 19:25:19,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817655906] [2021-08-25 19:25:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817655906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:19,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:19,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:25:19,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695913194] [2021-08-25 19:25:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:25:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:25:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:25:19,288 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:19,493 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-25 19:25:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:25:19,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 [2021-08-25 19:25:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:19,495 INFO L225 Difference]: With dead ends: 81 [2021-08-25 19:25:19,495 INFO L226 Difference]: Without dead ends: 74 [2021-08-25 19:25:19,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:25:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-25 19:25:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-08-25 19:25:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-25 19:25:19,501 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2021-08-25 19:25:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:19,501 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-25 19:25:19,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-25 19:25:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:25:19,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:19,502 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:19,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:19,702 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,SelfDestructingSolverStorable10 [2021-08-25 19:25:19,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 1 times [2021-08-25 19:25:19,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:19,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006677248] [2021-08-25 19:25:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:19,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:19,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:19,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913023964] [2021-08-25 19:25:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:19,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:19,734 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) [2021-08-25 19:25:19,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 19:25:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 19:25:19,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:25:20,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:20,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006677248] [2021-08-25 19:25:20,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:20,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913023964] [2021-08-25 19:25:20,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913023964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:25:20,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:25:20,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:25:20,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956297360] [2021-08-25 19:25:20,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:25:20,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:25:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:25:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:25:20,042 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:20,170 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-25 19:25:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:25:20,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 19:25:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:20,171 INFO L225 Difference]: With dead ends: 76 [2021-08-25 19:25:20,171 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:25:20,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:25:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:25:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2021-08-25 19:25:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2021-08-25 19:25:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-25 19:25:20,182 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 24 [2021-08-25 19:25:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:20,182 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-25 19:25:20,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-25 19:25:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:25:20,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:20,186 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:20,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:20,386 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,SelfDestructingSolverStorable11 [2021-08-25 19:25:20,386 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 7 times [2021-08-25 19:25:20,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:25:20,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140691722] [2021-08-25 19:25:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:20,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:25:20,402 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:25:20,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801123529] [2021-08-25 19:25:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 19:25:20,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:25:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:20,421 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) [2021-08-25 19:25:20,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 19:25:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:20,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-25 19:25:20,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:20,959 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-08-25 19:25:20,960 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 29 treesize of output 21 [2021-08-25 19:25:20,969 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 10 treesize of output 8 [2021-08-25 19:25:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 278 [2021-08-25 19:25:21,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 55 [2021-08-25 19:25:21,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 86 [2021-08-25 19:25:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 60 [2021-08-25 19:25:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2021-08-25 19:25:21,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,759 INFO L354 Elim1Store]: treesize reduction 972, result has 20.9 percent of original size [2021-08-25 19:25:21,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 214 treesize of output 418 [2021-08-25 19:25:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,841 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-25 19:25:21,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 78 [2021-08-25 19:25:21,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:21,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 78 [2021-08-25 19:25:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:25:22,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 91 [2021-08-25 19:25:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 77 [2021-08-25 19:25:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:22,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 74 [2021-08-25 19:25:25,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:25:25,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140691722] [2021-08-25 19:25:25,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:25:25,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801123529] [2021-08-25 19:25:25,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-25 19:25:25,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:25,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:25:25,460 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-25 19:25:25,460 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:25:25,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:25:25,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:25,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-25 19:25:25,669 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:25:25,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:25:25 BoogieIcfgContainer [2021-08-25 19:25:25,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:25:25,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:25:25,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:25:25,680 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:25:25,680 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:25:06" (3/4) ... [2021-08-25 19:25:25,682 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:25:25,682 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:25:25,683 INFO L168 Benchmark]: Toolchain (without parser) took 19815.18 ms. Allocated memory was 52.4 MB in the beginning and 142.6 MB in the end (delta: 90.2 MB). Free memory was 29.1 MB in the beginning and 67.9 MB in the end (delta: -38.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 16.1 GB. [2021-08-25 19:25:25,683 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory was 34.0 MB in the beginning and 33.9 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:25:25,684 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.60 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.8 MB in the beginning and 46.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:25:25,684 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.89 ms. Allocated memory is still 62.9 MB. Free memory was 46.0 MB in the beginning and 44.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:25:25,684 INFO L168 Benchmark]: Boogie Preprocessor took 44.04 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 43.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:25:25,684 INFO L168 Benchmark]: RCFGBuilder took 417.65 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 43.2 MB in the end (delta: -156.0 kB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-08-25 19:25:25,685 INFO L168 Benchmark]: TraceAbstraction took 19042.71 ms. Allocated memory was 62.9 MB in the beginning and 142.6 MB in the end (delta: 79.7 MB). Free memory was 42.7 MB in the beginning and 69.0 MB in the end (delta: -26.3 MB). Peak memory consumption was 84.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:25:25,685 INFO L168 Benchmark]: Witness Printer took 2.61 ms. Allocated memory is still 142.6 MB. Free memory was 69.0 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:25:25,686 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory was 34.0 MB in the beginning and 33.9 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.60 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.8 MB in the beginning and 46.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.89 ms. Allocated memory is still 62.9 MB. Free memory was 46.0 MB in the beginning and 44.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.04 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 43.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 417.65 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 43.2 MB in the end (delta: -156.0 kB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19042.71 ms. Allocated memory was 62.9 MB in the beginning and 142.6 MB in the end (delta: 79.7 MB). Free memory was 42.7 MB in the beginning and 69.0 MB in the end (delta: -26.3 MB). Peak memory consumption was 84.7 MB. Max. memory is 16.1 GB. * Witness Printer took 2.61 ms. Allocated memory is still 142.6 MB. Free memory was 69.0 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 1 [L32] a[0] = N+1 [L34] i=1 [L34] COND TRUE i 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 -> e2af4d8739465a787d4a8047ac8d84cdc6a08c8b [2021-08-25 19:25:27,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:25:27,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:25:27,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:25:27,983 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:25:27,984 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:25:27,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2021-08-25 19:25:28,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109ae698b/c132fc32adf649a69c8db03ef8353e65/FLAG31416ee64 [2021-08-25 19:25:28,474 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:25:28,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2021-08-25 19:25:28,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109ae698b/c132fc32adf649a69c8db03ef8353e65/FLAG31416ee64 [2021-08-25 19:25:28,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109ae698b/c132fc32adf649a69c8db03ef8353e65 [2021-08-25 19:25:28,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:25:28,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:25:28,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:25:28,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:25:28,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:25:28,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61db44ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28, skipping insertion in model container [2021-08-25 19:25:28,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:25:28,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:25:28,692 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2021-08-25 19:25:28,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:25:28,734 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:25:28,754 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2021-08-25 19:25:28,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:25:28,791 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:25:28,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28 WrapperNode [2021-08-25 19:25:28,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:25:28,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:25:28,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:25:28,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:25:28,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:25:28,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:25:28,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:25:28,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:25:28,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:25:28,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:25:28,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:25:28,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:25:28,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (1/1) ... [2021-08-25 19:25:28,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:25:28,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:25:28,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:25:28,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:25:28,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 19:25:28,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:25:28,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-25 19:25:28,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:25:28,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:25:28,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:25:28,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-25 19:25:29,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:25:29,409 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:25:29,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:25:29 BoogieIcfgContainer [2021-08-25 19:25:29,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:25:29,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:25:29,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:25:29,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:25:29,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:25:28" (1/3) ... [2021-08-25 19:25:29,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149e9d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:25:29, skipping insertion in model container [2021-08-25 19:25:29,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:25:28" (2/3) ... [2021-08-25 19:25:29,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149e9d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:25:29, skipping insertion in model container [2021-08-25 19:25:29,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:25:29" (3/3) ... [2021-08-25 19:25:29,416 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm.c [2021-08-25 19:25:29,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:25:29,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:25:29,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:25:29,463 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:25:29,464 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:25:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2021-08-25 19:25:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:25:29,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:29,478 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:29,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:25:29,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:25:29,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877782362] [2021-08-25 19:25:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:29,492 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:25:29,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:25:29,498 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) [2021-08-25 19:25:29,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-25 19:25:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 19:25:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:29,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:25:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:29,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:25:29,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877782362] [2021-08-25 19:25:29,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877782362] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:25:29,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:29,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 19:25:29,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339163033] [2021-08-25 19:25:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:25:29,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:25:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:25:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:25:29,766 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:29,777 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:25:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:25:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2021-08-25 19:25:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:29,783 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:25:29,783 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:25:29,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:25:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:25:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:25:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:25:29,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:25:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:29,819 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:25:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:25:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:25:29,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:29,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:29,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:30,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:25:30,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:25:30,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:25:30,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843634675] [2021-08-25 19:25:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:30,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:25:30,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:25:30,023 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) [2021-08-25 19:25:30,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-25 19:25:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-25 19:25:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:30,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:30,509 INFO L354 Elim1Store]: treesize reduction 160, result has 23.1 percent of original size [2021-08-25 19:25:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 72 [2021-08-25 19:25:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:30,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:31,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:25:31,009 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 89 [2021-08-25 19:25:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:25:32,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:32,423 INFO L354 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2021-08-25 19:25:32,424 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 1 [2021-08-25 19:25:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:32,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:25:32,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843634675] [2021-08-25 19:25:32,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843634675] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:25:32,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:25:32,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-08-25 19:25:32,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183316516] [2021-08-25 19:25:32,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:25:32,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:25:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:25:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:25:32,445 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:34,354 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-08-25 19:25:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:25:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:25:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:34,363 INFO L225 Difference]: With dead ends: 36 [2021-08-25 19:25:34,363 INFO L226 Difference]: Without dead ends: 19 [2021-08-25 19:25:34,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2137.9ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-08-25 19:25:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-25 19:25:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-25 19:25:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-25 19:25:34,368 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-08-25 19:25:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:34,368 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-25 19:25:34,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-25 19:25:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:25:34,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:34,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:34,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:34,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:25:34,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:25:34,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:25:34,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686400254] [2021-08-25 19:25:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:34,580 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:25:34,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:25:34,581 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) [2021-08-25 19:25:34,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-25 19:25:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:34,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:25:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:34,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:25:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:35,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:25:35,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686400254] [2021-08-25 19:25:35,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686400254] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:25:35,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:25:35,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-25 19:25:35,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390983193] [2021-08-25 19:25:35,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:25:35,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:25:35,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:25:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:25:35,279 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:25:36,180 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-08-25 19:25:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 19:25:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 14 [2021-08-25 19:25:36,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:25:36,189 INFO L225 Difference]: With dead ends: 47 [2021-08-25 19:25:36,189 INFO L226 Difference]: Without dead ends: 38 [2021-08-25 19:25:36,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 717.2ms TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-08-25 19:25:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-25 19:25:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-08-25 19:25:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-25 19:25:36,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-08-25 19:25:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:25:36,195 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-25 19:25:36,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:25:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-25 19:25:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:25:36,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:25:36,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:25:36,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:25:36,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:25:36,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:25:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:25:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:25:36,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:25:36,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667155600] [2021-08-25 19:25:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:25:36,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:25:36,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:25:36,399 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) [2021-08-25 19:25:36,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-25 19:25:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:25:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 19:25:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:25:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:36,781 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-08-25 19:25:36,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 49 [2021-08-25 19:25:36,836 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 12 treesize of output 10 [2021-08-25 19:25:36,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:36,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,021 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-25 19:25:37,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 127 [2021-08-25 19:25:37,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:37,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:37,872 INFO L354 Elim1Store]: treesize reduction 136, result has 15.5 percent of original size [2021-08-25 19:25:37,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 286 treesize of output 209 [2021-08-25 19:25:38,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:38,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:38,652 INFO L354 Elim1Store]: treesize reduction 114, result has 16.8 percent of original size [2021-08-25 19:25:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 382 treesize of output 160 [2021-08-25 19:25:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:38,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:25:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:41,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:41,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:41,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:25:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:25:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:25:41,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:25:41,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667155600] [2021-08-25 19:25:41,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667155600] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:25:41,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:25:41,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-25 19:25:41,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693671939] [2021-08-25 19:25:41,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-25 19:25:41,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:25:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-25 19:25:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-25 19:25:41,399 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2021-08-25 19:26:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:26:01,417 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-08-25 19:26:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-25 19:26:01,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 16 [2021-08-25 19:26:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:26:01,426 INFO L225 Difference]: With dead ends: 63 [2021-08-25 19:26:01,427 INFO L226 Difference]: Without dead ends: 43 [2021-08-25 19:26:01,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 16826.2ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-08-25 19:26:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-25 19:26:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-08-25 19:26:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:26:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-08-25 19:26:01,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 16 [2021-08-25 19:26:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:26:01,433 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-08-25 19:26:01,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2021-08-25 19:26:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-08-25 19:26:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:26:01,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:26:01,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:26:01,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:26:01,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:26:01,635 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:26:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:26:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-08-25 19:26:01,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:26:01,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004574295] [2021-08-25 19:26:01,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:26:01,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:26:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:26:01,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:26:01,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-25 19:26:01,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:26:01,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:26:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-25 19:26:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:26:02,099 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 12 treesize of output 10 [2021-08-25 19:26:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 45 [2021-08-25 19:26:02,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,305 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-25 19:26:02,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 127 [2021-08-25 19:26:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:02,742 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-25 19:26:02,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 233 treesize of output 207 [2021-08-25 19:26:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:03,884 INFO L354 Elim1Store]: treesize reduction 273, result has 16.5 percent of original size [2021-08-25 19:26:03,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 15 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 124 case distinctions, treesize of input 398 treesize of output 321 [2021-08-25 19:26:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:04,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:04,794 INFO L354 Elim1Store]: treesize reduction 197, result has 12.8 percent of original size [2021-08-25 19:26:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 15 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 138 case distinctions, treesize of input 554 treesize of output 368 [2021-08-25 19:26:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:05,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:05,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:05,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:05,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:06,140 INFO L354 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2021-08-25 19:26:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 15 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 716 treesize of output 242 [2021-08-25 19:26:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:26:06,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:26:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:17,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:26:17,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:26:17,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004574295] [2021-08-25 19:26:17,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004574295] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:26:17,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:26:17,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-25 19:26:17,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701700947] [2021-08-25 19:26:17,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-25 19:26:17,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:26:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-25 19:26:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-08-25 19:26:17,948 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:27:25,030 WARN L207 SmtUtils]: Spent 1.02 m on a formula simplification. DAG size of input: 160 DAG size of output: 155 [2021-08-25 19:28:33,918 WARN L207 SmtUtils]: Spent 50.11 s on a formula simplification. DAG size of input: 171 DAG size of output: 156 [2021-08-25 19:30:36,278 WARN L207 SmtUtils]: Spent 1.90 m on a formula simplification. DAG size of input: 180 DAG size of output: 165 [2021-08-25 19:30:53,060 WARN L207 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2021-08-25 19:31:42,245 WARN L207 SmtUtils]: Spent 16.12 s on a formula simplification. DAG size of input: 130 DAG size of output: 122 [2021-08-25 19:32:34,249 WARN L207 SmtUtils]: Spent 37.07 s on a formula simplification. DAG size of input: 145 DAG size of output: 136 [2021-08-25 19:33:13,541 WARN L207 SmtUtils]: Spent 15.72 s on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2021-08-25 19:33:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:33:24,774 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-08-25 19:33:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-25 19:33:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:33:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:33:24,787 INFO L225 Difference]: With dead ends: 88 [2021-08-25 19:33:24,787 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:33:24,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 386757.3ms TimeCoverageRelationStatistics Valid=977, Invalid=3054, Unknown=1, NotChecked=0, Total=4032 [2021-08-25 19:33:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:33:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2021-08-25 19:33:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:33:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-08-25 19:33:24,795 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2021-08-25 19:33:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:33:24,795 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-08-25 19:33:24,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:33:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-08-25 19:33:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:33:24,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:33:24,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:33:24,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:33:25,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:33:25,009 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:33:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:33:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 1 times [2021-08-25 19:33:25,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:33:25,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800560983] [2021-08-25 19:33:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:33:25,010 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:33:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:33:25,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:33:25,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-25 19:33:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:33:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-25 19:33:25,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:33:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-25 19:33:25,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:33:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-25 19:33:26,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:33:26,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800560983] [2021-08-25 19:33:26,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800560983] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:33:26,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:33:26,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-25 19:33:26,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963084976] [2021-08-25 19:33:26,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-25 19:33:26,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:33:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-25 19:33:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-25 19:33:26,608 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:33:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:33:28,693 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2021-08-25 19:33:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-25 19:33:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 19:33:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:33:28,702 INFO L225 Difference]: With dead ends: 87 [2021-08-25 19:33:28,702 INFO L226 Difference]: Without dead ends: 75 [2021-08-25 19:33:28,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1751.2ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-08-25 19:33:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-25 19:33:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2021-08-25 19:33:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:33:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-08-25 19:33:28,712 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 24 [2021-08-25 19:33:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:33:28,712 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-08-25 19:33:28,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:33:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-08-25 19:33:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:33:28,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:33:28,713 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:33:28,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:33:28,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:33:28,917 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:33:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:33:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 3 times [2021-08-25 19:33:28,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:33:28,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100268565] [2021-08-25 19:33:28,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:33:28,917 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:33:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:33:28,918 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:33:28,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-25 19:33:29,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 19:33:29,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:33:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-25 19:33:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:33:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:29,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:29,557 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-08-25 19:33:29,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 49 [2021-08-25 19:33:29,600 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 12 treesize of output 10 [2021-08-25 19:33:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:29,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:29,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:29,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:29,768 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-25 19:33:29,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 131 [2021-08-25 19:33:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:30,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:30,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:33:30,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:30,634 INFO L354 Elim1Store]: treesize reduction 1676, result has 7.5 percent of original size [2021-08-25 19:33:30,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 56 case distinctions, treesize of input 233 treesize of output 196 [2021-08-25 19:33:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:31,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:33:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:34:36,802 WARN L207 SmtUtils]: Spent 1.09 m on a formula simplification. DAG size of input: 324 DAG size of output: 122 [2021-08-25 19:34:36,803 INFO L354 Elim1Store]: treesize reduction 1828, result has 18.1 percent of original size [2021-08-25 19:34:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 8 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 50 case distinctions, treesize of input 288 treesize of output 522 [2021-08-25 19:37:02,558 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-25 19:37:02,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:37:02,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100268565] [2021-08-25 19:37:02,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-08-25 19:37:02,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445838851] [2021-08-25 19:37:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:37:02,560 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 19:37:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 19:37:02,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 19:37:02,565 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 101 [2021-08-25 19:37:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-08-25 19:37:03,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:37:03,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617920855] [2021-08-25 19:37:03,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:37:03,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:37:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:37:03,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:37:03,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 19:37:03,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 1 [2021-08-25 19:37:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 19:37:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:37:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-25 19:37:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:37:04,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-08-25 19:37:04,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:37:04,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:37:04,268 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 19:37:04,268 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:37:04,271 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:37:04,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:37:04,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-25 19:37:04,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:37:04,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:37:04,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:37:04 BoogieIcfgContainer [2021-08-25 19:37:04,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:37:04,693 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:37:04,693 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:37:04,693 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:37:04,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:25:29" (3/4) ... [2021-08-25 19:37:04,695 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:37:04,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:37:04,695 INFO L168 Benchmark]: Toolchain (without parser) took 696185.38 ms. Allocated memory was 50.3 MB in the beginning and 83.9 MB in the end (delta: 33.6 MB). Free memory was 27.4 MB in the beginning and 41.7 MB in the end (delta: -14.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-08-25 19:37:04,696 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 50.3 MB. Free memory was 32.7 MB in the beginning and 32.6 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:37:04,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.93 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 27.2 MB in the beginning and 52.0 MB in the end (delta: -24.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:37:04,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.43 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 50.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:37:04,697 INFO L168 Benchmark]: Boogie Preprocessor took 47.48 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 48.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:37:04,697 INFO L168 Benchmark]: RCFGBuilder took 519.12 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 49.5 MB in the end (delta: -652.9 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:37:04,698 INFO L168 Benchmark]: TraceAbstraction took 695280.64 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 48.9 MB in the beginning and 41.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:37:04,698 INFO L168 Benchmark]: Witness Printer took 2.18 ms. Allocated memory is still 83.9 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:37:04,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 50.3 MB. Free memory was 32.7 MB in the beginning and 32.6 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.93 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 27.2 MB in the beginning and 52.0 MB in the end (delta: -24.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.43 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 50.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.48 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 48.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 519.12 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 49.5 MB in the end (delta: -652.9 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 695280.64 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 48.9 MB in the beginning and 41.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.18 ms. Allocated memory is still 83.9 MB. Free memory is still 41.7 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: 15]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 1 [L32] a[0] = N+1 [L34] i=1 [L34] COND TRUE i