./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array15_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array15_pattern.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 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:32:23,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:32:23,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:32:23,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:32:23,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:32:23,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:32:23,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:32:23,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:32:23,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:32:23,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:32:23,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:32:23,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:32:23,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:32:23,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:32:23,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:32:23,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:32:23,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:32:23,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:32:23,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:32:23,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:32:23,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:32:23,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:32:23,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:32:23,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:32:23,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:32:23,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:32:23,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:32:23,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:32:23,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:32:23,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:32:23,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:32:23,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:32:23,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:32:23,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:32:23,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:32:23,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:32:23,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:32:23,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:32:23,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:32:23,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:32:23,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:32:23,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:32:23,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:32:23,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:32:23,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:32:23,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:32:23,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:32:23,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:32:23,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:32:23,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:32:23,474 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:32:23,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:32:23,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:32:23,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:32:23,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:32:23,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:32:23,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:32:23,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:32:23,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:32:23,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:32:23,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:32:23,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:32:23,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:32:23,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:32:23,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:32:23,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:32:23,478 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:32:23,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:32:23,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:32:23,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:32:23,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-12-17 00:32:23,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:32:23,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:32:23,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:32:23,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:32:23,710 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:32:23,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-17 00:32:23,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6a1e11f/1425a2535d0f4018ace494506f0a3e87/FLAGb39ad529d [2021-12-17 00:32:24,082 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:32:24,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-17 00:32:24,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6a1e11f/1425a2535d0f4018ace494506f0a3e87/FLAGb39ad529d [2021-12-17 00:32:24,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6a1e11f/1425a2535d0f4018ace494506f0a3e87 [2021-12-17 00:32:24,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:32:24,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:32:24,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:32:24,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:32:24,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:32:24,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24, skipping insertion in model container [2021-12-17 00:32:24,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:32:24,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:32:24,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-17 00:32:24,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:32:24,680 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:32:24,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-17 00:32:24,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:32:24,707 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:32:24,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24 WrapperNode [2021-12-17 00:32:24,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:32:24,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:32:24,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:32:24,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:32:24,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,745 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-17 00:32:24,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:32:24,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:32:24,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:32:24,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:32:24,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:32:24,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:32:24,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:32:24,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:32:24,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (1/1) ... [2021-12-17 00:32:24,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:32:24,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:24,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:32:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:32:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:32:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:32:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:32:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:32:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:32:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:32:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:32:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:32:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:32:24,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:32:24,893 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:32:24,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:32:25,034 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:32:25,038 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:32:25,038 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 00:32:25,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:32:25 BoogieIcfgContainer [2021-12-17 00:32:25,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:32:25,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:32:25,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:32:25,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:32:25,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:32:24" (1/3) ... [2021-12-17 00:32:25,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408d05af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:32:25, skipping insertion in model container [2021-12-17 00:32:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:32:24" (2/3) ... [2021-12-17 00:32:25,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408d05af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:32:25, skipping insertion in model container [2021-12-17 00:32:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:32:25" (3/3) ... [2021-12-17 00:32:25,045 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-12-17 00:32:25,048 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:32:25,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:32:25,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:32:25,078 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:32:25,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:32:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:32:25,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:25,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:25,092 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2021-12-17 00:32:25,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:25,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44708076] [2021-12-17 00:32:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:25,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:25,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:32:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:32:25,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:25,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44708076] [2021-12-17 00:32:25,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44708076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:32:25,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:25,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:32:25,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307105048] [2021-12-17 00:32:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:32:25,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:32:25,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:32:25,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:32:25,229 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:32:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:25,249 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2021-12-17 00:32:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:32:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 00:32:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:25,264 INFO L225 Difference]: With dead ends: 61 [2021-12-17 00:32:25,264 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 00:32:25,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:32:25,272 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:25,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:32:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 00:32:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 00:32:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-17 00:32:25,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-12-17 00:32:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-17 00:32:25,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:32:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-17 00:32:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 00:32:25,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:25,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:25,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:32:25,314 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2021-12-17 00:32:25,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641521993] [2021-12-17 00:32:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:25,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:25,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577378074] [2021-12-17 00:32:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:25,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:25,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:32:25,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:32:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:32:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:25,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:32:25,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:25,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641521993] [2021-12-17 00:32:25,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:25,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577378074] [2021-12-17 00:32:25,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577378074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:32:25,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:25,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 00:32:25,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372586736] [2021-12-17 00:32:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:32:25,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 00:32:25,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 00:32:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:32:25,583 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:32:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:25,693 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-12-17 00:32:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 00:32:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-17 00:32:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:25,700 INFO L225 Difference]: With dead ends: 60 [2021-12-17 00:32:25,700 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 00:32:25,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:32:25,703 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:25,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 53 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:32:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 00:32:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-17 00:32:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-17 00:32:25,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2021-12-17 00:32:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:25,714 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-17 00:32:25,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:32:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-17 00:32:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:32:25,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:25,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:25,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:25,919 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 [2021-12-17 00:32:25,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2021-12-17 00:32:25,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:25,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739635277] [2021-12-17 00:32:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:25,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:25,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:25,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89255780] [2021-12-17 00:32:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:25,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:25,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:25,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:32:25,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:32:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:32:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:32:26,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:32:26,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739635277] [2021-12-17 00:32:26,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89255780] [2021-12-17 00:32:26,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89255780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:32:26,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:32:26,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:32:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151420431] [2021-12-17 00:32:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:32:26,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:32:26,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:32:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:32:26,067 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:32:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:26,100 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-17 00:32:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:32:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-17 00:32:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:26,101 INFO L225 Difference]: With dead ends: 63 [2021-12-17 00:32:26,101 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 00:32:26,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:32:26,102 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:26,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:32:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 00:32:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-17 00:32:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-17 00:32:26,107 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2021-12-17 00:32:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:26,107 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-17 00:32:26,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:32:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-17 00:32:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:32:26,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:26,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:26,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:26,325 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 [2021-12-17 00:32:26,325 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2021-12-17 00:32:26,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:26,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226619582] [2021-12-17 00:32:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:26,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:26,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:26,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271171922] [2021-12-17 00:32:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:26,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:26,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:32:26,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:32:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 00:32:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:32:26,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:32:26,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:26,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226619582] [2021-12-17 00:32:26,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:26,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271171922] [2021-12-17 00:32:26,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271171922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:26,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:26,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-12-17 00:32:26,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188455944] [2021-12-17 00:32:26,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:26,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 00:32:26,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 00:32:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:32:26,975 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 00:32:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:27,321 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2021-12-17 00:32:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:32:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-12-17 00:32:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:27,323 INFO L225 Difference]: With dead ends: 107 [2021-12-17 00:32:27,323 INFO L226 Difference]: Without dead ends: 85 [2021-12-17 00:32:27,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-12-17 00:32:27,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:27,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 163 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:32:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-17 00:32:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2021-12-17 00:32:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:32:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-17 00:32:27,331 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2021-12-17 00:32:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:27,332 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-17 00:32:27,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 00:32:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-17 00:32:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:32:27,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:27,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:27,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:27,546 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 [2021-12-17 00:32:27,547 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2021-12-17 00:32:27,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:27,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038343802] [2021-12-17 00:32:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:27,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:27,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:27,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186214957] [2021-12-17 00:32:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:27,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:27,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:27,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:32:27,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:32:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:32:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 00:32:27,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2021-12-17 00:32:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-12-17 00:32:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 107 [2021-12-17 00:32:27,924 INFO L354 Elim1Store]: treesize reduction 248, result has 27.3 percent of original size [2021-12-17 00:32:27,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 106 treesize of output 172 [2021-12-17 00:32:27,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:27,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 51 [2021-12-17 00:32:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:28,005 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-12-17 00:32:28,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 54 [2021-12-17 00:32:28,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:32:28,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 50 [2021-12-17 00:32:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:32:28,133 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-12-17 00:32:28,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 57 [2021-12-17 00:32:28,237 INFO L354 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2021-12-17 00:32:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 51 [2021-12-17 00:32:28,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-17 00:32:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:28,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:28,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-12-17 00:32:28,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:32:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 58 [2021-12-17 00:32:28,726 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 32 treesize of output 17 [2021-12-17 00:32:28,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:32:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2021-12-17 00:32:28,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:32:28,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-12-17 00:32:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:32:29,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038343802] [2021-12-17 00:32:29,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186214957] [2021-12-17 00:32:29,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186214957] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:29,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:29,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-12-17 00:32:29,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925665063] [2021-12-17 00:32:29,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:29,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:32:29,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:29,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:32:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:32:29,141 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:32:31,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-17 00:32:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:31,811 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2021-12-17 00:32:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:32:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-12-17 00:32:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:31,813 INFO L225 Difference]: With dead ends: 92 [2021-12-17 00:32:31,813 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 00:32:31,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:32:31,814 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:31,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 218 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 276 Invalid, 1 Unknown, 25 Unchecked, 2.6s Time] [2021-12-17 00:32:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 00:32:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-12-17 00:32:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:32:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-12-17 00:32:31,821 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 39 [2021-12-17 00:32:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:31,821 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-12-17 00:32:31,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:32:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-12-17 00:32:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:32:31,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:31,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:31,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:32,035 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 [2021-12-17 00:32:32,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2021-12-17 00:32:32,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:32,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936401666] [2021-12-17 00:32:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:32,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:32,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:32,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83339666] [2021-12-17 00:32:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:32:32,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:32,047 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) [2021-12-17 00:32:32,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:32:32,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:32:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:32:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:32:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:32,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:32:32,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936401666] [2021-12-17 00:32:32,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83339666] [2021-12-17 00:32:32,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83339666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:32,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:32,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 00:32:32,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382201033] [2021-12-17 00:32:32,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:32,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:32:32,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:32:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:32:32,238 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:32:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:32,347 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2021-12-17 00:32:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 00:32:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-17 00:32:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:32,350 INFO L225 Difference]: With dead ends: 155 [2021-12-17 00:32:32,350 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 00:32:32,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:32:32,352 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:32,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 101 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:32:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 00:32:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2021-12-17 00:32:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:32:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-12-17 00:32:32,374 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 41 [2021-12-17 00:32:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:32,374 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-12-17 00:32:32,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:32:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-12-17 00:32:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:32:32,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:32,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:32,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:32,596 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 [2021-12-17 00:32:32,597 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2021-12-17 00:32:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:32,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648616629] [2021-12-17 00:32:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:32,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:32,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288361638] [2021-12-17 00:32:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:32:32,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:32,606 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) [2021-12-17 00:32:32,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:32:32,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:32:32,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:32:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:32:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:32:32,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:32:32,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648616629] [2021-12-17 00:32:32,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288361638] [2021-12-17 00:32:32,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288361638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:32,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:32,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-17 00:32:32,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469761862] [2021-12-17 00:32:32,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:32,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:32:32,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:32:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:32:32,830 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:32:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:32,952 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2021-12-17 00:32:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:32:32,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-17 00:32:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:32,953 INFO L225 Difference]: With dead ends: 167 [2021-12-17 00:32:32,953 INFO L226 Difference]: Without dead ends: 120 [2021-12-17 00:32:32,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:32:32,954 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:32,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:32:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-17 00:32:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-12-17 00:32:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:32:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-12-17 00:32:32,964 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2021-12-17 00:32:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:32,965 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-12-17 00:32:32,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:32:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-12-17 00:32:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 00:32:32,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:32,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:32,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:33,183 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 [2021-12-17 00:32:33,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2021-12-17 00:32:33,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883925535] [2021-12-17 00:32:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:33,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:33,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:33,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167328740] [2021-12-17 00:32:33,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:32:33,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:33,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:33,193 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) [2021-12-17 00:32:33,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 00:32:33,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 00:32:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:32:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:32:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:32:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:32:33,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883925535] [2021-12-17 00:32:33,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:33,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167328740] [2021-12-17 00:32:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167328740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:33,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:33,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 00:32:33,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925031018] [2021-12-17 00:32:33,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:33,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:32:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:32:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:32:33,369 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 00:32:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:33,466 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2021-12-17 00:32:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 00:32:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-12-17 00:32:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:33,468 INFO L225 Difference]: With dead ends: 144 [2021-12-17 00:32:33,468 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 00:32:33,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:32:33,469 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:33,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:32:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 00:32:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-12-17 00:32:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:32:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-12-17 00:32:33,474 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 44 [2021-12-17 00:32:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-12-17 00:32:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 00:32:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-12-17 00:32:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 00:32:33,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:33,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:33,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:33,693 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 [2021-12-17 00:32:33,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1693722629, now seen corresponding path program 3 times [2021-12-17 00:32:33,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:33,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046513221] [2021-12-17 00:32:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:33,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:33,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:33,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520022975] [2021-12-17 00:32:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:32:33,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:33,703 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) [2021-12-17 00:32:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 00:32:33,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 00:32:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:32:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 00:32:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 00:32:33,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:32:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 00:32:34,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:32:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046513221] [2021-12-17 00:32:34,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:32:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520022975] [2021-12-17 00:32:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520022975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:32:34,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:32:34,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-12-17 00:32:34,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326633802] [2021-12-17 00:32:34,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:32:34,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 00:32:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:32:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 00:32:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:32:34,224 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:32:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:32:34,515 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-17 00:32:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 00:32:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2021-12-17 00:32:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:32:34,516 INFO L225 Difference]: With dead ends: 98 [2021-12-17 00:32:34,516 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 00:32:34,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 00:32:34,517 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 192 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:32:34,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 138 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:32:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 00:32:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 54. [2021-12-17 00:32:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:32:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-17 00:32:34,520 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2021-12-17 00:32:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:32:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-17 00:32:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:32:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-17 00:32:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 00:32:34,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:32:34,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:32:34,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:32:34,731 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 [2021-12-17 00:32:34,731 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:32:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:32:34,731 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 4 times [2021-12-17 00:32:34,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:32:34,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525425885] [2021-12-17 00:32:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:32:34,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:32:34,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:32:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756123752] [2021-12-17 00:32:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:32:34,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:32:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:32:34,740 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) [2021-12-17 00:32:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 00:32:35,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:32:35,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:32:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 00:32:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:32:35,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:32:35,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:32:35,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 56 [2021-12-17 00:32:35,082 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 29 treesize of output 16 [2021-12-17 00:32:35,100 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 48 treesize of output 22 [2021-12-17 00:32:35,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 68 [2021-12-17 00:32:35,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:32:35,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 85 [2021-12-17 00:32:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-12-17 00:32:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 37 [2021-12-17 00:32:35,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2021-12-17 00:32:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 88 [2021-12-17 00:32:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-12-17 00:32:35,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2021-12-17 00:32:35,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 103 [2021-12-17 00:32:35,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:35,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 30 [2021-12-17 00:32:36,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 90 [2021-12-17 00:32:36,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:36,189 INFO L354 Elim1Store]: treesize reduction 249, result has 46.5 percent of original size [2021-12-17 00:32:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 89 treesize of output 285 [2021-12-17 00:32:37,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:32:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:32:37,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 72 [2021-12-17 00:32:37,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 32 [2021-12-17 00:32:37,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-12-17 00:32:37,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:32:37,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 85 [2021-12-17 00:32:37,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 28 [2021-12-17 00:32:38,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:32:38,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-12-17 00:32:38,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:32:38,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,213 INFO L354 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2021-12-17 00:32:38,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 49 [2021-12-17 00:32:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-12-17 00:32:46,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2021-12-17 00:32:46,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:46,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:46,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:32:46,712 INFO L354 Elim1Store]: treesize reduction 308, result has 22.4 percent of original size [2021-12-17 00:32:46,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 204 treesize of output 177 [2021-12-17 00:32:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:32:47,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:08,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:33:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525425885] [2021-12-17 00:33:08,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:33:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756123752] [2021-12-17 00:33:08,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756123752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:33:08,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:33:08,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-17 00:33:08,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172308038] [2021-12-17 00:33:08,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:33:08,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 00:33:08,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:33:08,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 00:33:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1454, Unknown=10, NotChecked=0, Total=1722 [2021-12-17 00:33:08,012 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:33:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:33:08,772 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2021-12-17 00:33:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 00:33:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-12-17 00:33:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:33:08,773 INFO L225 Difference]: With dead ends: 153 [2021-12-17 00:33:08,773 INFO L226 Difference]: Without dead ends: 149 [2021-12-17 00:33:08,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=333, Invalid=1910, Unknown=13, NotChecked=0, Total=2256 [2021-12-17 00:33:08,774 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 948 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:33:08,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 484 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 476 Invalid, 0 Unknown, 948 Unchecked, 0.4s Time] [2021-12-17 00:33:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-17 00:33:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2021-12-17 00:33:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:33:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-12-17 00:33:08,781 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 57 [2021-12-17 00:33:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:33:08,781 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-12-17 00:33:08,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:33:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-12-17 00:33:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 00:33:08,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:33:08,782 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:33:08,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:33:08,995 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 [2021-12-17 00:33:08,995 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:33:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:33:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash 230304975, now seen corresponding path program 4 times [2021-12-17 00:33:08,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:33:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208039349] [2021-12-17 00:33:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:33:08,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:33:09,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:33:09,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013771992] [2021-12-17 00:33:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:33:09,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:33:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:33:09,003 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) [2021-12-17 00:33:09,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 00:33:09,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:33:09,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:33:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 00:33:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:33:09,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:33:09,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:33:09,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 56 [2021-12-17 00:33:09,361 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 29 treesize of output 16 [2021-12-17 00:33:09,380 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 48 treesize of output 22 [2021-12-17 00:33:09,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 68 [2021-12-17 00:33:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:33:09,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 85 [2021-12-17 00:33:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 30 [2021-12-17 00:33:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 40 [2021-12-17 00:33:09,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 86 [2021-12-17 00:33:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 126 [2021-12-17 00:33:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 48 [2021-12-17 00:33:09,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2021-12-17 00:33:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 103 [2021-12-17 00:33:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:09,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 42 [2021-12-17 00:33:10,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 116 [2021-12-17 00:33:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:10,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:10,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:10,501 INFO L354 Elim1Store]: treesize reduction 479, result has 25.7 percent of original size [2021-12-17 00:33:10,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 115 treesize of output 235 [2021-12-17 00:33:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:11,135 INFO L354 Elim1Store]: treesize reduction 280, result has 0.4 percent of original size [2021-12-17 00:33:11,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 154 treesize of output 84 [2021-12-17 00:33:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:33:12,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:33:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 42 [2021-12-17 00:33:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:33:12,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:33:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-12-17 00:33:45,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:33:45,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 58 [2021-12-17 00:33:45,460 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 32 treesize of output 17 [2021-12-17 00:33:46,060 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 49 treesize of output 23 [2021-12-17 00:33:48,574 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-12-17 00:33:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 24601519 treesize of output 23438562 [2021-12-17 00:34:22,052 WARN L227 SmtUtils]: Spent 33.46s on a formula simplification that was a NOOP. DAG size: 5854 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 00:34:22,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:34:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208039349] [2021-12-17 00:34:22,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:34:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013771992] [2021-12-17 00:34:22,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 00:34:22,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:34:22,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 00:34:22,142 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 00:34:22,143 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 00:34:22,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 00:34:22,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:22,366 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 [2021-12-17 00:34:22,369 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1] [2021-12-17 00:34:22,370 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 00:34:22,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:34:22 BoogieIcfgContainer [2021-12-17 00:34:22,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 00:34:22,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 00:34:22,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 00:34:22,390 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 00:34:22,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:32:25" (3/4) ... [2021-12-17 00:34:22,392 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 00:34:22,392 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 00:34:22,392 INFO L158 Benchmark]: Toolchain (without parser) took 117883.84ms. Allocated memory was 130.0MB in the beginning and 503.3MB in the end (delta: 373.3MB). Free memory was 93.6MB in the beginning and 295.8MB in the end (delta: -202.2MB). Peak memory consumption was 170.8MB. Max. memory is 16.1GB. [2021-12-17 00:34:22,392 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 130.0MB. Free memory was 101.4MB in the beginning and 101.4MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:34:22,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.40ms. Allocated memory is still 130.0MB. Free memory was 93.4MB in the beginning and 103.7MB in the end (delta: -10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:34:22,393 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.96ms. Allocated memory is still 130.0MB. Free memory was 103.1MB in the beginning and 101.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:34:22,393 INFO L158 Benchmark]: Boogie Preprocessor took 31.51ms. Allocated memory is still 130.0MB. Free memory was 101.6MB in the beginning and 100.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:34:22,394 INFO L158 Benchmark]: RCFGBuilder took 261.71ms. Allocated memory is still 130.0MB. Free memory was 100.3MB in the beginning and 89.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 00:34:22,394 INFO L158 Benchmark]: TraceAbstraction took 117348.15ms. Allocated memory was 130.0MB in the beginning and 503.3MB in the end (delta: 373.3MB). Free memory was 88.4MB in the beginning and 295.8MB in the end (delta: -207.4MB). Peak memory consumption was 295.7MB. Max. memory is 16.1GB. [2021-12-17 00:34:22,394 INFO L158 Benchmark]: Witness Printer took 2.56ms. Allocated memory is still 503.3MB. Free memory is still 295.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:34:22,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 130.0MB. Free memory was 101.4MB in the beginning and 101.4MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 197.40ms. Allocated memory is still 130.0MB. Free memory was 93.4MB in the beginning and 103.7MB in the end (delta: -10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.96ms. Allocated memory is still 130.0MB. Free memory was 103.1MB in the beginning and 101.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.51ms. Allocated memory is still 130.0MB. Free memory was 101.6MB in the beginning and 100.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 261.71ms. Allocated memory is still 130.0MB. Free memory was 100.3MB in the beginning and 89.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 117348.15ms. Allocated memory was 130.0MB in the beginning and 503.3MB in the end (delta: 373.3MB). Free memory was 88.4MB in the beginning and 295.8MB in the end (delta: -207.4MB). Peak memory consumption was 295.7MB. Max. memory is 16.1GB. * Witness Printer took 2.56ms. Allocated memory is still 503.3MB. Free memory is still 295.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 39]: 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: [L43] signed long long ARR_SIZE ; [L47] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L48] CALL assume_abort_if_not(ARR_SIZE > 0) [L37] COND FALSE !(!cond) [L48] RET assume_abort_if_not(ARR_SIZE > 0) [L50] int array[ARR_SIZE][ARR_SIZE] ; [L52] int row = 0, column = 0, num = -1 ; [L53] signed long long sum = 0 ; [L54] int temp ; [L55] short index1,index2 ; [L57] row=0 [L57] COND TRUE row=0 && index1 < ARR_SIZE) [L37] COND FALSE !(!cond) [L66] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L67] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L37] COND FALSE !(!cond) [L67] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L69] temp = index1+index2 [L70] EXPR (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L70] EXPR array[index1][index2] [L70] EXPR (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L70] array[index1][index2] = (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L73] temp = __VERIFIER_nondet_int() [L74] COND TRUE temp == 0 [L77] row=0 [L77] COND TRUE row 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 -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-12-17 00:34:24,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:34:24,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:34:24,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:34:24,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:34:24,389 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:34:24,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-17 00:34:24,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f4f689e/725f2273010845f8a5fb6ebd8be5a3d2/FLAG3aeb6bc72 [2021-12-17 00:34:24,797 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:34:24,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-12-17 00:34:24,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f4f689e/725f2273010845f8a5fb6ebd8be5a3d2/FLAG3aeb6bc72 [2021-12-17 00:34:24,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f4f689e/725f2273010845f8a5fb6ebd8be5a3d2 [2021-12-17 00:34:24,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:34:24,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:34:24,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:34:24,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:34:24,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:34:24,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:34:24" (1/1) ... [2021-12-17 00:34:24,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a59975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:24, skipping insertion in model container [2021-12-17 00:34:24,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:34:24" (1/1) ... [2021-12-17 00:34:24,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:34:24,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:34:24,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-17 00:34:24,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:34:25,001 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:34:25,032 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-12-17 00:34:25,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:34:25,057 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:34:25,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25 WrapperNode [2021-12-17 00:34:25,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:34:25,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:34:25,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:34:25,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:34:25,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,093 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2021-12-17 00:34:25,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:34:25,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:34:25,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:34:25,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:34:25,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:34:25,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:34:25,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:34:25,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:34:25,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (1/1) ... [2021-12-17 00:34:25,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:34:25,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:34:25,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:34:25,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:34:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:34:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:34:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:34:25,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:34:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:34:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 00:34:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:34:25,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:34:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:34:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-17 00:34:25,240 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:34:25,241 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:34:25,468 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:34:25,472 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:34:25,472 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 00:34:25,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:34:25 BoogieIcfgContainer [2021-12-17 00:34:25,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:34:25,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:34:25,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:34:25,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:34:25,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:34:24" (1/3) ... [2021-12-17 00:34:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc518d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:34:25, skipping insertion in model container [2021-12-17 00:34:25,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:34:25" (2/3) ... [2021-12-17 00:34:25,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc518d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:34:25, skipping insertion in model container [2021-12-17 00:34:25,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:34:25" (3/3) ... [2021-12-17 00:34:25,478 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-12-17 00:34:25,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:34:25,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:34:25,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:34:25,522 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:34:25,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:34:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:34:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:34:25,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:25,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:25,537 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2021-12-17 00:34:25,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:25,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031860732] [2021-12-17 00:34:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:25,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:25,556 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) [2021-12-17 00:34:25,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:34:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:34:25,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:34:25,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:34:25,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:25,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031860732] [2021-12-17 00:34:25,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031860732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:34:25,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:34:25,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:34:25,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514636641] [2021-12-17 00:34:25,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:34:25,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:34:25,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:34:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:34:25,715 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:34:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:25,732 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2021-12-17 00:34:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:34:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 00:34:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:25,738 INFO L225 Difference]: With dead ends: 61 [2021-12-17 00:34:25,738 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 00:34:25,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:34:25,743 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:25,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:34:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 00:34:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 00:34:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:34:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-17 00:34:25,772 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-12-17 00:34:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:25,773 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-17 00:34:25,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:34:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-17 00:34:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 00:34:25,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:25,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:25,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:25,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:25,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2021-12-17 00:34:25,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:25,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346660625] [2021-12-17 00:34:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:25,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:25,987 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) [2021-12-17 00:34:25,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:34:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:26,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:34:26,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:26,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346660625] [2021-12-17 00:34:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346660625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:26,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:26,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:26,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366827885] [2021-12-17 00:34:26,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:26,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:26,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:26,870 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:27,005 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-17 00:34:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2021-12-17 00:34:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:27,007 INFO L225 Difference]: With dead ends: 51 [2021-12-17 00:34:27,007 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 00:34:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:27,009 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:27,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 136 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-12-17 00:34:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 00:34:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-17 00:34:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:34:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-17 00:34:27,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 29 [2021-12-17 00:34:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:27,020 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-17 00:34:27,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:27,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-17 00:34:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 00:34:27,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:27,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:27,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:27,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:27,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash 386286863, now seen corresponding path program 1 times [2021-12-17 00:34:27,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:27,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185231142] [2021-12-17 00:34:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:27,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:27,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:27,231 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) [2021-12-17 00:34:27,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:34:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:34:27,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:27,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185231142] [2021-12-17 00:34:27,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185231142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:27,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:27,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:27,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747582434] [2021-12-17 00:34:27,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:27,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:27,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:27,913 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:28,106 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-12-17 00:34:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2021-12-17 00:34:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:28,108 INFO L225 Difference]: With dead ends: 76 [2021-12-17 00:34:28,108 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 00:34:28,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:28,109 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:28,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 144 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2021-12-17 00:34:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 00:34:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-12-17 00:34:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-17 00:34:28,117 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 29 [2021-12-17 00:34:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:28,118 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-17 00:34:28,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-17 00:34:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 00:34:28,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:28,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:28,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-17 00:34:28,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:28,326 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:28,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1917152573, now seen corresponding path program 1 times [2021-12-17 00:34:28,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:28,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601021995] [2021-12-17 00:34:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:28,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:28,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:28,328 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) [2021-12-17 00:34:28,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:34:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:28,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:34:28,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:34:29,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601021995] [2021-12-17 00:34:29,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601021995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:29,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:29,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:29,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878541394] [2021-12-17 00:34:29,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:29,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:29,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:29,104 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:29,219 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-12-17 00:34:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-12-17 00:34:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:29,221 INFO L225 Difference]: With dead ends: 77 [2021-12-17 00:34:29,221 INFO L226 Difference]: Without dead ends: 73 [2021-12-17 00:34:29,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:29,222 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:29,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 149 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-12-17 00:34:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-17 00:34:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-12-17 00:34:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-12-17 00:34:29,229 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2021-12-17 00:34:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:29,229 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-12-17 00:34:29,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-12-17 00:34:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 00:34:29,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:29,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:29,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-17 00:34:29,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:29,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1481418797, now seen corresponding path program 1 times [2021-12-17 00:34:29,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:29,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5405760] [2021-12-17 00:34:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:29,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:29,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:29,440 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) [2021-12-17 00:34:29,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 00:34:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:34:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:34:30,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5405760] [2021-12-17 00:34:30,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5405760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:30,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:30,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:30,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995524638] [2021-12-17 00:34:30,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:30,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:30,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:30,169 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:30,355 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2021-12-17 00:34:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-12-17 00:34:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:30,357 INFO L225 Difference]: With dead ends: 92 [2021-12-17 00:34:30,357 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 00:34:30,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:34:30,358 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:30,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 133 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2021-12-17 00:34:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 00:34:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-12-17 00:34:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:34:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-12-17 00:34:30,365 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 32 [2021-12-17 00:34:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:30,365 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-12-17 00:34:30,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:30,366 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-12-17 00:34:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 00:34:30,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:30,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:30,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:30,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:30,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 672072171, now seen corresponding path program 1 times [2021-12-17 00:34:30,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240041589] [2021-12-17 00:34:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:30,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:30,578 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) [2021-12-17 00:34:30,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:34:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:30,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:34:30,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:34:31,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:31,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240041589] [2021-12-17 00:34:31,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240041589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:31,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:31,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:31,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322410409] [2021-12-17 00:34:31,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:31,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:31,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:31,304 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:31,512 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-12-17 00:34:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:31,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-12-17 00:34:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:31,514 INFO L225 Difference]: With dead ends: 118 [2021-12-17 00:34:31,514 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 00:34:31,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:34:31,515 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:31,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 162 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-12-17 00:34:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 00:34:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-12-17 00:34:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:34:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2021-12-17 00:34:31,523 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 32 [2021-12-17 00:34:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:31,523 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2021-12-17 00:34:31,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2021-12-17 00:34:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 00:34:31,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:31,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:31,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:31,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:31,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash 317605125, now seen corresponding path program 1 times [2021-12-17 00:34:31,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:31,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736346580] [2021-12-17 00:34:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:31,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:31,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:31,733 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) [2021-12-17 00:34:31,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:34:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:34:31,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:31,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:34:31,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736346580] [2021-12-17 00:34:31,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736346580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:34:31,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:34:31,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 00:34:31,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744124265] [2021-12-17 00:34:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:34:31,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:34:31,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:34:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:34:31,936 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:34:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:31,940 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-12-17 00:34:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:34:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-12-17 00:34:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:31,941 INFO L225 Difference]: With dead ends: 128 [2021-12-17 00:34:31,941 INFO L226 Difference]: Without dead ends: 73 [2021-12-17 00:34:31,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:34:31,942 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:31,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-12-17 00:34:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-17 00:34:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-17 00:34:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 states have internal predecessors, (72), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-12-17 00:34:31,947 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 34 [2021-12-17 00:34:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:31,948 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-12-17 00:34:31,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:34:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-12-17 00:34:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 00:34:31,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:31,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:31,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:32,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:32,156 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1699065963, now seen corresponding path program 1 times [2021-12-17 00:34:32,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:32,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444397285] [2021-12-17 00:34:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:32,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:32,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:32,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:34:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:34:32,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444397285] [2021-12-17 00:34:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444397285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:32,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:32,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:32,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332873248] [2021-12-17 00:34:32,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:32,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:32,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:32,865 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:33,005 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2021-12-17 00:34:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2021-12-17 00:34:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:33,007 INFO L225 Difference]: With dead ends: 92 [2021-12-17 00:34:33,007 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 00:34:33,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:34:33,008 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:33,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 129 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-12-17 00:34:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 00:34:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2021-12-17 00:34:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 states have internal predecessors, (72), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-12-17 00:34:33,026 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 34 [2021-12-17 00:34:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:33,027 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-12-17 00:34:33,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-12-17 00:34:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 00:34:33,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:33,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:33,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:33,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:33,236 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash 889719337, now seen corresponding path program 1 times [2021-12-17 00:34:33,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:33,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877790386] [2021-12-17 00:34:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:33,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:33,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:33,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:34:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:33,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:33,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:34:33,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:33,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877790386] [2021-12-17 00:34:33,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877790386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:33,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:33,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:33,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876124694] [2021-12-17 00:34:33,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:33,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:33,951 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:34,102 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2021-12-17 00:34:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2021-12-17 00:34:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:34,104 INFO L225 Difference]: With dead ends: 101 [2021-12-17 00:34:34,104 INFO L226 Difference]: Without dead ends: 97 [2021-12-17 00:34:34,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:34:34,104 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:34,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 156 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-12-17 00:34:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-17 00:34:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-12-17 00:34:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:34:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2021-12-17 00:34:34,112 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 34 [2021-12-17 00:34:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:34,112 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-12-17 00:34:34,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2021-12-17 00:34:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:34:34,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:34,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:34,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:34,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:34,320 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2021-12-17 00:34:34,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290752633] [2021-12-17 00:34:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:34,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:34,322 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:34,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 00:34:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:34:35,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290752633] [2021-12-17 00:34:35,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290752633] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:35,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:35,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:35,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461411690] [2021-12-17 00:34:35,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:35,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:35,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:35,035 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:35,102 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2021-12-17 00:34:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-17 00:34:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:35,104 INFO L225 Difference]: With dead ends: 113 [2021-12-17 00:34:35,104 INFO L226 Difference]: Without dead ends: 109 [2021-12-17 00:34:35,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:35,105 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:35,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 132 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-12-17 00:34:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-17 00:34:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2021-12-17 00:34:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.2375) internal successors, (99), 80 states have internal predecessors, (99), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 00:34:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2021-12-17 00:34:35,112 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 35 [2021-12-17 00:34:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:35,112 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2021-12-17 00:34:35,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2021-12-17 00:34:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:34:35,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:35,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:35,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-17 00:34:35,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:35,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1385877079, now seen corresponding path program 1 times [2021-12-17 00:34:35,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645682062] [2021-12-17 00:34:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:35,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:35,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:35,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:34:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:34:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:35,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:34:35,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645682062] [2021-12-17 00:34:35,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645682062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:34:35,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:34:35,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 00:34:35,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457142188] [2021-12-17 00:34:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:34:35,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:34:35,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:34:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:34:35,518 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:34:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:35,521 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2021-12-17 00:34:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:34:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-12-17 00:34:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:35,522 INFO L225 Difference]: With dead ends: 162 [2021-12-17 00:34:35,522 INFO L226 Difference]: Without dead ends: 67 [2021-12-17 00:34:35,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:34:35,523 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:35,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-12-17 00:34:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-17 00:34:35,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-17 00:34:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-12-17 00:34:35,532 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2021-12-17 00:34:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:35,532 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-12-17 00:34:35,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:34:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-12-17 00:34:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:34:35,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:35,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:35,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:35,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:35,741 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2108850025, now seen corresponding path program 1 times [2021-12-17 00:34:35,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:35,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871058308] [2021-12-17 00:34:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:35,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:35,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:35,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:35,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:34:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:34:36,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:34:36,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:36,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871058308] [2021-12-17 00:34:36,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871058308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:36,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:36,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:36,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531150709] [2021-12-17 00:34:36,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:36,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:36,483 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:36,569 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-12-17 00:34:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:34:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-12-17 00:34:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:36,570 INFO L225 Difference]: With dead ends: 76 [2021-12-17 00:34:36,570 INFO L226 Difference]: Without dead ends: 72 [2021-12-17 00:34:36,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:36,571 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:36,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 94 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-12-17 00:34:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-17 00:34:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-12-17 00:34:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-12-17 00:34:36,575 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 37 [2021-12-17 00:34:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:36,575 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-12-17 00:34:36,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-12-17 00:34:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:34:36,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:36,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:36,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:36,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:36,784 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1485052693, now seen corresponding path program 1 times [2021-12-17 00:34:36,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890790265] [2021-12-17 00:34:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:36,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:36,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:36,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:36,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:34:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:34:37,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:34:37,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:37,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890790265] [2021-12-17 00:34:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890790265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:37,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:37,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:37,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803589542] [2021-12-17 00:34:37,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:37,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:37,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:37,504 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:37,605 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-17 00:34:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:34:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-12-17 00:34:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:37,607 INFO L225 Difference]: With dead ends: 78 [2021-12-17 00:34:37,607 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 00:34:37,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:37,607 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:37,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 124 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2021-12-17 00:34:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 00:34:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-12-17 00:34:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:34:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2021-12-17 00:34:37,611 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 37 [2021-12-17 00:34:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:37,612 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2021-12-17 00:34:37,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2021-12-17 00:34:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:34:37,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:37,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:37,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:37,819 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2021-12-17 00:34:37,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471827350] [2021-12-17 00:34:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:37,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:37,821 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:37,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 00:34:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 00:34:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:38,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471827350] [2021-12-17 00:34:38,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471827350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:34:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728922188] [2021-12-17 00:34:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:38,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 00:34:38,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 00:34:38,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 00:34:38,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-17 00:34:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 00:34:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:39,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:39,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1728922188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:34:39,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:39,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-12-17 00:34:39,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781204645] [2021-12-17 00:34:39,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:39,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:34:39,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:34:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:34:39,110 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 00:34:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:39,255 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-12-17 00:34:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:34:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-12-17 00:34:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:39,256 INFO L225 Difference]: With dead ends: 118 [2021-12-17 00:34:39,256 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 00:34:39,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:34:39,257 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:39,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 102 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2021-12-17 00:34:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 00:34:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-17 00:34:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 65 states have internal predecessors, (80), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:34:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2021-12-17 00:34:39,261 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 39 [2021-12-17 00:34:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:39,261 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2021-12-17 00:34:39,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 00:34:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2021-12-17 00:34:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:34:39,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:39,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:39,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:39,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:39,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:39,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2021-12-17 00:34:39,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:39,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037721373] [2021-12-17 00:34:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:39,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:39,667 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:39,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 00:34:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 00:34:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:34:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:34:40,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:34:40,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-12-17 00:34:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-17 00:34:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:34:41,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:43,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037721373] [2021-12-17 00:34:43,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037721373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:34:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1615329008] [2021-12-17 00:34:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:34:43,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 00:34:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 00:34:43,526 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 00:34:43,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-17 00:34:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:34:43,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 00:34:43,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:43,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:34:44,636 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-12-17 00:34:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 30 [2021-12-17 00:34:44,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-17 00:34:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:34:44,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-12-17 00:34:45,920 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 52 treesize of output 50 [2021-12-17 00:34:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:34:47,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1615329008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:47,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:34:47,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 12] total 33 [2021-12-17 00:34:47,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070323865] [2021-12-17 00:34:47,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:47,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 00:34:47,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 00:34:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 00:34:47,540 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-17 00:34:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:53,888 INFO L93 Difference]: Finished difference Result 191 states and 248 transitions. [2021-12-17 00:34:53,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 00:34:53,891 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 39 [2021-12-17 00:34:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:53,895 INFO L225 Difference]: With dead ends: 191 [2021-12-17 00:34:53,896 INFO L226 Difference]: Without dead ends: 172 [2021-12-17 00:34:53,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 86 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 00:34:53,898 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 131 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:53,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 371 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 370 Invalid, 0 Unknown, 421 Unchecked, 3.7s Time] [2021-12-17 00:34:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-17 00:34:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-12-17 00:34:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 107 states have internal predecessors, (135), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 00:34:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-12-17 00:34:53,907 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 39 [2021-12-17 00:34:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:53,908 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-12-17 00:34:53,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-17 00:34:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-12-17 00:34:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:34:53,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:53,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:53,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:54,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:54,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 00:34:54,313 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2021-12-17 00:34:54,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:54,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933977044] [2021-12-17 00:34:54,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:34:54,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:54,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:54,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:54,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 00:34:54,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:34:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:34:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:34:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:34:54,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:34:54,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:54,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933977044] [2021-12-17 00:34:54,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933977044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:54,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:54,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:34:54,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126417823] [2021-12-17 00:34:54,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:54,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:34:54,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:34:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:54,979 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:34:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:55,446 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2021-12-17 00:34:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 00:34:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-17 00:34:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:55,449 INFO L225 Difference]: With dead ends: 171 [2021-12-17 00:34:55,449 INFO L226 Difference]: Without dead ends: 167 [2021-12-17 00:34:55,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:34:55,449 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:55,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2021-12-17 00:34:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-17 00:34:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-12-17 00:34:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 118 states have internal predecessors, (152), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 00:34:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2021-12-17 00:34:55,463 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 41 [2021-12-17 00:34:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:55,464 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2021-12-17 00:34:55,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:34:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2021-12-17 00:34:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:34:55,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:55,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:55,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:55,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:55,673 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2021-12-17 00:34:55,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:55,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853167922] [2021-12-17 00:34:55,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:34:55,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:55,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:55,675 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:55,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 00:34:55,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:34:55,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:34:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:34:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:34:56,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:34:56,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:56,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853167922] [2021-12-17 00:34:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853167922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:56,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:56,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:34:56,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619200156] [2021-12-17 00:34:56,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:56,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:34:56,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:56,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:34:56,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:34:56,373 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:56,542 INFO L93 Difference]: Finished difference Result 222 states and 294 transitions. [2021-12-17 00:34:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:34:56,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-12-17 00:34:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:56,543 INFO L225 Difference]: With dead ends: 222 [2021-12-17 00:34:56,543 INFO L226 Difference]: Without dead ends: 218 [2021-12-17 00:34:56,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:34:56,544 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:56,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 205 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2021-12-17 00:34:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-17 00:34:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2021-12-17 00:34:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 154 states have (on average 1.3051948051948052) internal successors, (201), 154 states have internal predecessors, (201), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 00:34:56,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 259 transitions. [2021-12-17 00:34:56,555 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 259 transitions. Word has length 41 [2021-12-17 00:34:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:56,556 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 259 transitions. [2021-12-17 00:34:56,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 259 transitions. [2021-12-17 00:34:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:34:56,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:56,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:56,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:56,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:56,763 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash 209355567, now seen corresponding path program 3 times [2021-12-17 00:34:56,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:56,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949591928] [2021-12-17 00:34:56,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:34:56,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:56,765 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:56,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 00:34:56,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 00:34:56,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:34:56,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:34:56,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:34:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:34:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:34:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:34:57,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:34:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949591928] [2021-12-17 00:34:57,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949591928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:34:57,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:34:57,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:34:57,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917426871] [2021-12-17 00:34:57,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:34:57,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:34:57,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:34:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:34:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:34:57,355 INFO L87 Difference]: Start difference. First operand 194 states and 259 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:34:58,288 INFO L93 Difference]: Finished difference Result 314 states and 407 transitions. [2021-12-17 00:34:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:34:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-12-17 00:34:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:34:58,290 INFO L225 Difference]: With dead ends: 314 [2021-12-17 00:34:58,291 INFO L226 Difference]: Without dead ends: 310 [2021-12-17 00:34:58,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:34:58,291 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 96 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:34:58,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 220 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 191 Unchecked, 0.5s Time] [2021-12-17 00:34:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-17 00:34:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 237. [2021-12-17 00:34:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 186 states have (on average 1.2903225806451613) internal successors, (240), 186 states have internal predecessors, (240), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 00:34:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 310 transitions. [2021-12-17 00:34:58,307 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 310 transitions. Word has length 41 [2021-12-17 00:34:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:34:58,308 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 310 transitions. [2021-12-17 00:34:58,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:34:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 310 transitions. [2021-12-17 00:34:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 00:34:58,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:34:58,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:34:58,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 00:34:58,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:34:58,517 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:34:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:34:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -221954877, now seen corresponding path program 3 times [2021-12-17 00:34:58,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:34:58,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993962991] [2021-12-17 00:34:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:34:58,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:34:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:34:58,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:34:58,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-17 00:34:58,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 00:34:58,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:34:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 00:34:58,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:35:03,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:04,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993962991] [2021-12-17 00:35:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993962991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:35:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605936941] [2021-12-17 00:35:04,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:35:04,405 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 00:35:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 00:35:04,406 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 00:35:04,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-17 00:35:04,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 00:35:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:35:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:35:07,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605936941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:35:07,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:07,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-12-17 00:35:07,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454278380] [2021-12-17 00:35:07,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:07,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:35:07,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:07,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:35:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=332, Unknown=1, NotChecked=0, Total=420 [2021-12-17 00:35:07,341 INFO L87 Difference]: Start difference. First operand 237 states and 310 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:35:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:07,536 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2021-12-17 00:35:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:35:07,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-12-17 00:35:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:07,537 INFO L225 Difference]: With dead ends: 283 [2021-12-17 00:35:07,537 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 00:35:07,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=98, Invalid=363, Unknown=1, NotChecked=0, Total=462 [2021-12-17 00:35:07,538 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:07,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 207 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 141 Unchecked, 0.0s Time] [2021-12-17 00:35:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 00:35:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 246. [2021-12-17 00:35:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 193 states have (on average 1.2694300518134716) internal successors, (245), 193 states have internal predecessors, (245), 33 states have call successors, (33), 19 states have call predecessors, (33), 19 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 00:35:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 311 transitions. [2021-12-17 00:35:07,550 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 311 transitions. Word has length 42 [2021-12-17 00:35:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:07,550 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 311 transitions. [2021-12-17 00:35:07,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:35:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 311 transitions. [2021-12-17 00:35:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 00:35:07,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:07,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:07,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:07,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-12-17 00:35:07,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 00:35:07,959 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 4 times [2021-12-17 00:35:07,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:07,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142645844] [2021-12-17 00:35:07,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:35:07,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:07,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:07,961 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:07,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-17 00:35:08,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:35:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:35:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:35:08,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:35:08,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142645844] [2021-12-17 00:35:08,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142645844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:08,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:08,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:35:08,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82350674] [2021-12-17 00:35:08,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:08,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:35:08,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:35:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:35:08,489 INFO L87 Difference]: Start difference. First operand 246 states and 311 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:09,067 INFO L93 Difference]: Finished difference Result 396 states and 511 transitions. [2021-12-17 00:35:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 00:35:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-17 00:35:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:09,069 INFO L225 Difference]: With dead ends: 396 [2021-12-17 00:35:09,069 INFO L226 Difference]: Without dead ends: 361 [2021-12-17 00:35:09,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:35:09,070 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:09,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 153 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 131 Unchecked, 0.5s Time] [2021-12-17 00:35:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-17 00:35:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 319. [2021-12-17 00:35:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 248 states have (on average 1.2701612903225807) internal successors, (315), 248 states have internal predecessors, (315), 49 states have call successors, (49), 21 states have call predecessors, (49), 21 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-17 00:35:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 413 transitions. [2021-12-17 00:35:09,087 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 413 transitions. Word has length 44 [2021-12-17 00:35:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:09,087 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 413 transitions. [2021-12-17 00:35:09,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 413 transitions. [2021-12-17 00:35:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 00:35:09,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:09,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:09,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-17 00:35:09,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:09,296 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 791501255, now seen corresponding path program 5 times [2021-12-17 00:35:09,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271171989] [2021-12-17 00:35:09,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:35:09,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:09,298 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:09,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-17 00:35:09,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 00:35:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:35:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:35:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:35:09,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:09,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271171989] [2021-12-17 00:35:09,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271171989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:09,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:09,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-12-17 00:35:09,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884840387] [2021-12-17 00:35:09,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:09,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:35:09,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:35:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:35:09,758 INFO L87 Difference]: Start difference. First operand 319 states and 413 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:35:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:12,551 INFO L93 Difference]: Finished difference Result 586 states and 758 transitions. [2021-12-17 00:35:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 00:35:12,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-12-17 00:35:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:12,557 INFO L225 Difference]: With dead ends: 586 [2021-12-17 00:35:12,558 INFO L226 Difference]: Without dead ends: 317 [2021-12-17 00:35:12,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 00:35:12,559 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:12,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 159 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 00:35:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-17 00:35:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 275. [2021-12-17 00:35:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 221 states have (on average 1.262443438914027) internal successors, (279), 221 states have internal predecessors, (279), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 00:35:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 349 transitions. [2021-12-17 00:35:12,573 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 349 transitions. Word has length 44 [2021-12-17 00:35:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:12,574 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 349 transitions. [2021-12-17 00:35:12,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:35:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 349 transitions. [2021-12-17 00:35:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 00:35:12,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:12,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:12,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:12,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:12,781 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:12,782 INFO L85 PathProgramCache]: Analyzing trace with hash -293757821, now seen corresponding path program 6 times [2021-12-17 00:35:12,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:12,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066387322] [2021-12-17 00:35:12,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:35:12,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:12,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:12,783 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:12,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-17 00:35:12,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 00:35:12,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:35:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:35:13,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 00:35:13,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066387322] [2021-12-17 00:35:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066387322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:13,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:13,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:35:13,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044814693] [2021-12-17 00:35:13,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:13,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:35:13,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:35:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:35:13,425 INFO L87 Difference]: Start difference. First operand 275 states and 349 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:13,704 INFO L93 Difference]: Finished difference Result 342 states and 424 transitions. [2021-12-17 00:35:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:35:13,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-17 00:35:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:13,706 INFO L225 Difference]: With dead ends: 342 [2021-12-17 00:35:13,706 INFO L226 Difference]: Without dead ends: 334 [2021-12-17 00:35:13,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:35:13,706 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:13,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 241 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2021-12-17 00:35:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-17 00:35:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 261. [2021-12-17 00:35:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 211 states have (on average 1.2606635071090047) internal successors, (266), 211 states have internal predecessors, (266), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 00:35:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 328 transitions. [2021-12-17 00:35:13,721 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 328 transitions. Word has length 44 [2021-12-17 00:35:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:13,721 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 328 transitions. [2021-12-17 00:35:13,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 328 transitions. [2021-12-17 00:35:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 00:35:13,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:13,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:13,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-17 00:35:13,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:13,929 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1788212485, now seen corresponding path program 7 times [2021-12-17 00:35:13,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:13,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231687901] [2021-12-17 00:35:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:35:13,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:13,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:13,931 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:13,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-17 00:35:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:35:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:35:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:35:14,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:35:14,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:14,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231687901] [2021-12-17 00:35:14,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231687901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:14,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:14,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-12-17 00:35:14,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389207402] [2021-12-17 00:35:14,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:14,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 00:35:14,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 00:35:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:35:14,575 INFO L87 Difference]: Start difference. First operand 261 states and 328 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:35:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:15,680 INFO L93 Difference]: Finished difference Result 639 states and 827 transitions. [2021-12-17 00:35:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 00:35:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2021-12-17 00:35:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:15,682 INFO L225 Difference]: With dead ends: 639 [2021-12-17 00:35:15,682 INFO L226 Difference]: Without dead ends: 448 [2021-12-17 00:35:15,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-12-17 00:35:15,683 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 115 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:15,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 304 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 191 Invalid, 0 Unknown, 203 Unchecked, 0.7s Time] [2021-12-17 00:35:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-17 00:35:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-12-17 00:35:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 227 states have internal predecessors, (286), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 00:35:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 348 transitions. [2021-12-17 00:35:15,703 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 348 transitions. Word has length 46 [2021-12-17 00:35:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:15,704 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 348 transitions. [2021-12-17 00:35:15,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:35:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 348 transitions. [2021-12-17 00:35:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 00:35:15,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:15,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:15,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:15,913 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1671597549, now seen corresponding path program 4 times [2021-12-17 00:35:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:15,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995594200] [2021-12-17 00:35:15,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:35:15,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:15,915 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:15,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-17 00:35:16,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:35:16,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:16,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 00:35:16,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:35:16,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 00:35:16,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:16,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995594200] [2021-12-17 00:35:16,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995594200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:16,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:16,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-12-17 00:35:16,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672327042] [2021-12-17 00:35:16,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:16,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:35:16,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:35:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:35:16,822 INFO L87 Difference]: Start difference. First operand 277 states and 348 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:35:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:18,844 INFO L93 Difference]: Finished difference Result 751 states and 949 transitions. [2021-12-17 00:35:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 00:35:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-12-17 00:35:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:18,848 INFO L225 Difference]: With dead ends: 751 [2021-12-17 00:35:18,849 INFO L226 Difference]: Without dead ends: 549 [2021-12-17 00:35:18,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=865, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 00:35:18,850 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 145 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:18,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 307 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 120 Invalid, 0 Unknown, 306 Unchecked, 0.7s Time] [2021-12-17 00:35:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-17 00:35:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 366. [2021-12-17 00:35:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 303 states have (on average 1.2607260726072607) internal successors, (382), 303 states have internal predecessors, (382), 39 states have call successors, (39), 23 states have call predecessors, (39), 23 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 00:35:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 460 transitions. [2021-12-17 00:35:18,877 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 460 transitions. Word has length 51 [2021-12-17 00:35:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:18,878 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 460 transitions. [2021-12-17 00:35:18,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:35:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 460 transitions. [2021-12-17 00:35:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 00:35:18,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:18,879 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:18,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:19,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:19,088 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1638340688, now seen corresponding path program 1 times [2021-12-17 00:35:19,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:19,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85809262] [2021-12-17 00:35:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:35:19,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:19,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:19,089 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:19,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-17 00:35:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:35:19,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 00:35:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:35:19,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:19,951 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85809262] [2021-12-17 00:35:19,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85809262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:35:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116414235] [2021-12-17 00:35:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:35:19,951 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 00:35:19,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 00:35:19,952 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 00:35:19,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-17 00:35:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:35:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 00:35:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:35:20,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:20,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116414235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:35:20,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:20,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-12-17 00:35:20,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437821904] [2021-12-17 00:35:20,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:20,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:35:20,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:20,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:35:20,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:35:20,503 INFO L87 Difference]: Start difference. First operand 366 states and 460 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:35:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:20,607 INFO L93 Difference]: Finished difference Result 377 states and 470 transitions. [2021-12-17 00:35:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:35:20,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2021-12-17 00:35:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:20,609 INFO L225 Difference]: With dead ends: 377 [2021-12-17 00:35:20,609 INFO L226 Difference]: Without dead ends: 329 [2021-12-17 00:35:20,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:35:20,610 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:20,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 114 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-17 00:35:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-17 00:35:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-12-17 00:35:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 276 states have (on average 1.2717391304347827) internal successors, (351), 276 states have internal predecessors, (351), 33 states have call successors, (33), 19 states have call predecessors, (33), 19 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 00:35:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 417 transitions. [2021-12-17 00:35:20,650 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 417 transitions. Word has length 54 [2021-12-17 00:35:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:20,650 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 417 transitions. [2021-12-17 00:35:20,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 00:35:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 417 transitions. [2021-12-17 00:35:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:35:20,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:20,651 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:20,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:20,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-17 00:35:21,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:21,054 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2074330689, now seen corresponding path program 8 times [2021-12-17 00:35:21,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:21,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807560702] [2021-12-17 00:35:21,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:35:21,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:21,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:21,056 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:21,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-17 00:35:21,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:35:21,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 00:35:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 00:35:21,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:35:21,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807560702] [2021-12-17 00:35:21,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807560702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:21,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:21,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-12-17 00:35:21,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886413845] [2021-12-17 00:35:21,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:21,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:35:21,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:35:21,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:35:21,987 INFO L87 Difference]: Start difference. First operand 329 states and 417 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:23,841 INFO L93 Difference]: Finished difference Result 585 states and 741 transitions. [2021-12-17 00:35:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 00:35:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2021-12-17 00:35:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:23,843 INFO L225 Difference]: With dead ends: 585 [2021-12-17 00:35:23,843 INFO L226 Difference]: Without dead ends: 527 [2021-12-17 00:35:23,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=539, Invalid=1717, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 00:35:23,844 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:23,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 291 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 140 Invalid, 0 Unknown, 312 Unchecked, 0.7s Time] [2021-12-17 00:35:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-17 00:35:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 399. [2021-12-17 00:35:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 339 states have (on average 1.2713864306784661) internal successors, (431), 340 states have internal predecessors, (431), 37 states have call successors, (37), 22 states have call predecessors, (37), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-17 00:35:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 505 transitions. [2021-12-17 00:35:23,877 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 505 transitions. Word has length 52 [2021-12-17 00:35:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:23,877 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 505 transitions. [2021-12-17 00:35:23,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 505 transitions. [2021-12-17 00:35:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 00:35:23,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:23,879 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:23,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:24,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:24,087 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash -911028083, now seen corresponding path program 5 times [2021-12-17 00:35:24,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:24,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44572081] [2021-12-17 00:35:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:35:24,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:24,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:24,089 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:24,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-17 00:35:24,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 00:35:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:35:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:35:24,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:35:24,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:24,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44572081] [2021-12-17 00:35:24,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44572081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:24,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:24,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:35:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157716727] [2021-12-17 00:35:24,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:24,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:35:24,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:35:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:35:24,674 INFO L87 Difference]: Start difference. First operand 399 states and 505 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:35:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:25,419 INFO L93 Difference]: Finished difference Result 929 states and 1164 transitions. [2021-12-17 00:35:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:35:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2021-12-17 00:35:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:25,430 INFO L225 Difference]: With dead ends: 929 [2021-12-17 00:35:25,430 INFO L226 Difference]: Without dead ends: 641 [2021-12-17 00:35:25,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2021-12-17 00:35:25,431 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 235 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:25,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 207 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 00:35:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-17 00:35:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 371. [2021-12-17 00:35:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 315 states have (on average 1.2031746031746031) internal successors, (379), 317 states have internal predecessors, (379), 33 states have call successors, (33), 22 states have call predecessors, (33), 22 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 00:35:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 445 transitions. [2021-12-17 00:35:25,462 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 445 transitions. Word has length 53 [2021-12-17 00:35:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:25,462 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 445 transitions. [2021-12-17 00:35:25,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 00:35:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 445 transitions. [2021-12-17 00:35:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 00:35:25,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:25,463 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:25,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-17 00:35:25,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:25,670 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 696004700, now seen corresponding path program 1 times [2021-12-17 00:35:25,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:25,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610807758] [2021-12-17 00:35:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:35:25,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:25,672 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:25,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-17 00:35:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:35:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:35:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 00:35:26,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:35:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 00:35:26,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:35:26,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610807758] [2021-12-17 00:35:26,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610807758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:35:26,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:35:26,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 00:35:26,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009073189] [2021-12-17 00:35:26,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:35:26,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:35:26,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:35:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:35:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:35:26,603 INFO L87 Difference]: Start difference. First operand 371 states and 445 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:35:26,744 INFO L93 Difference]: Finished difference Result 376 states and 449 transitions. [2021-12-17 00:35:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:35:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2021-12-17 00:35:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:35:26,745 INFO L225 Difference]: With dead ends: 376 [2021-12-17 00:35:26,745 INFO L226 Difference]: Without dead ends: 372 [2021-12-17 00:35:26,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:35:26,746 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:35:26,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 82 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2021-12-17 00:35:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-17 00:35:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 319. [2021-12-17 00:35:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 275 states have (on average 1.1854545454545455) internal successors, (326), 279 states have internal predecessors, (326), 25 states have call successors, (25), 18 states have call predecessors, (25), 18 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 00:35:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 376 transitions. [2021-12-17 00:35:26,793 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 376 transitions. Word has length 58 [2021-12-17 00:35:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:35:26,793 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 376 transitions. [2021-12-17 00:35:26,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 00:35:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 376 transitions. [2021-12-17 00:35:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 00:35:26,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:35:26,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:35:26,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-17 00:35:26,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:35:26,999 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:35:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:35:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 6 times [2021-12-17 00:35:27,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:35:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907921193] [2021-12-17 00:35:27,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:35:27,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:35:27,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:35:27,001 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:35:27,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-17 00:35:27,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 00:35:27,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:35:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-17 00:35:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:35:27,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-17 00:35:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-12-17 00:35:28,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:28,447 INFO L354 Elim1Store]: treesize reduction 129, result has 20.9 percent of original size [2021-12-17 00:35:28,447 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 3 case distinctions, treesize of input 55 treesize of output 57 [2021-12-17 00:35:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:28,829 INFO L354 Elim1Store]: treesize reduction 90, result has 15.9 percent of original size [2021-12-17 00:35:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 51 [2021-12-17 00:35:33,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:35:48,199 WARN L227 SmtUtils]: Spent 14.67s on a formula simplification. DAG size of input: 52 DAG size of output: 39 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-17 00:35:48,200 INFO L354 Elim1Store]: treesize reduction 131, result has 45.6 percent of original size [2021-12-17 00:35:48,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 141 Killed by 15