./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/array29_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 c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:21:08,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:21:08,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:21:08,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:21:08,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:21:08,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:21:08,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:21:08,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:21:08,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:21:08,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:21:08,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:21:08,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:21:08,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:21:08,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:21:08,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:21:08,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:21:08,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:21:08,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:21:08,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:21:08,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:21:08,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:21:08,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:21:08,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:21:08,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:21:08,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:21:08,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:21:08,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:21:08,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:21:08,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:21:08,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:21:08,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:21:08,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:21:08,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:21:08,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:21:08,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:21:08,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:21:08,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:21:08,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:21:08,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:21:08,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:21:08,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:21:08,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:21:08,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:21:08,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:21:08,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:21:08,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:21:08,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:21:08,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:21:08,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:21:08,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:21:08,560 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:21:08,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:21:08,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:21:08,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:21:08,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:21:08,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:21:08,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:21:08,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:21:08,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:21:08,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:21:08,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:21:08,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:21:08,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:21:08,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:21:08,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:21:08,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:21:08,565 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:21:08,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:21:08,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:21:08,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:21:08,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-12-22 08:21:08,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:21:08,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:21:08,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:21:08,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:21:08,817 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:21:08,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-22 08:21:08,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a1a42fd/d7b3b2c781644d7ebeb6bbf62bb4572f/FLAG3506ca92a [2021-12-22 08:21:09,209 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:21:09,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-22 08:21:09,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a1a42fd/d7b3b2c781644d7ebeb6bbf62bb4572f/FLAG3506ca92a [2021-12-22 08:21:09,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a1a42fd/d7b3b2c781644d7ebeb6bbf62bb4572f [2021-12-22 08:21:09,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:21:09,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:21:09,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:21:09,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:21:09,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:21:09,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55511155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09, skipping insertion in model container [2021-12-22 08:21:09,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:21:09,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:21:09,788 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/array29_pattern.c[1255,1268] [2021-12-22 08:21:09,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:21:09,801 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:21:09,808 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/array29_pattern.c[1255,1268] [2021-12-22 08:21:09,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:21:09,826 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:21:09,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09 WrapperNode [2021-12-22 08:21:09,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:21:09,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:21:09,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:21:09,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:21:09,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,861 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-22 08:21:09,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:21:09,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:21:09,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:21:09,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:21:09,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:21:09,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:21:09,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:21:09,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:21:09,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (1/1) ... [2021-12-22 08:21:09,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:21:09,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:09,909 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) [2021-12-22 08:21:09,913 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 [2021-12-22 08:21:09,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:21:09,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:21:09,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:21:09,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:21:09,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:21:09,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:21:09,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:21:09,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:21:09,975 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:21:09,976 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:21:10,085 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:21:10,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:21:10,088 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 08:21:10,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:10 BoogieIcfgContainer [2021-12-22 08:21:10,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:21:10,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:21:10,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:21:10,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:21:10,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:21:09" (1/3) ... [2021-12-22 08:21:10,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5b7a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:21:10, skipping insertion in model container [2021-12-22 08:21:10,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:21:09" (2/3) ... [2021-12-22 08:21:10,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5b7a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:21:10, skipping insertion in model container [2021-12-22 08:21:10,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:10" (3/3) ... [2021-12-22 08:21:10,095 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-12-22 08:21:10,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:21:10,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:21:10,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:21:10,128 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 [2021-12-22 08:21:10,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:21:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 08:21:10,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:10,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:10,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-22 08:21:10,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:10,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534787006] [2021-12-22 08:21:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:10,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:21:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:21:10,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:21:10,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534787006] [2021-12-22 08:21:10,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534787006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:21:10,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:21:10,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:21:10,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888062047] [2021-12-22 08:21:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:21:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:21:10,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:21:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:21:10,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:21:10,295 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:21:10,307 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-22 08:21:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:21:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 08:21:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:21:10,314 INFO L225 Difference]: With dead ends: 41 [2021-12-22 08:21:10,314 INFO L226 Difference]: Without dead ends: 18 [2021-12-22 08:21:10,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:21:10,320 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-22 08:21:10,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:21:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-22 08:21:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-22 08:21:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-22 08:21:10,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-22 08:21:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:21:10,346 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-22 08:21:10,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-22 08:21:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 08:21:10,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:10,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:10,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:21:10,348 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-22 08:21:10,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:10,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753601023] [2021-12-22 08:21:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:10,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:10,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:21:10,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179229583] [2021-12-22 08:21:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:10,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:21:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:10,384 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) [2021-12-22 08:21:10,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:21:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:21:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 08:21:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:21:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:21:10,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:21:10,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:21:10,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753601023] [2021-12-22 08:21:10,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:21:10,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179229583] [2021-12-22 08:21:10,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179229583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:21:10,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:21:10,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:21:10,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580125269] [2021-12-22 08:21:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:21:10,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:21:10,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:21:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:21:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:21:10,583 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:21:10,667 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-12-22 08:21:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:21:10,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 08:21:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:21:10,669 INFO L225 Difference]: With dead ends: 36 [2021-12-22 08:21:10,669 INFO L226 Difference]: Without dead ends: 27 [2021-12-22 08:21:10,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:21:10,670 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:21:10,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:21:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-22 08:21:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-12-22 08:21:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-22 08:21:10,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2021-12-22 08:21:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:21:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-22 08:21:10,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-22 08:21:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 08:21:10,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:10,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:10,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 08:21:10,894 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 [2021-12-22 08:21:10,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash 129650620, now seen corresponding path program 1 times [2021-12-22 08:21:10,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:10,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511386522] [2021-12-22 08:21:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:10,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:10,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:21:10,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560555053] [2021-12-22 08:21:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:10,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:21:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:10,911 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) [2021-12-22 08:21:10,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:21:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:21:10,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:21:10,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:21:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:21:10,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:21:10,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:21:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511386522] [2021-12-22 08:21:10,998 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:21:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560555053] [2021-12-22 08:21:10,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560555053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:21:10,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:21:10,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:21:10,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373346384] [2021-12-22 08:21:10,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:21:10,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:21:10,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:21:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:21:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:21:11,000 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:21:11,031 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-12-22 08:21:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:21:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 08:21:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:21:11,032 INFO L225 Difference]: With dead ends: 40 [2021-12-22 08:21:11,032 INFO L226 Difference]: Without dead ends: 25 [2021-12-22 08:21:11,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:21:11,033 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:21:11,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:21:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-22 08:21:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-22 08:21:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-22 08:21:11,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-12-22 08:21:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:21:11,043 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-22 08:21:11,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-22 08:21:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 08:21:11,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:11,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:11,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 08:21:11,260 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 [2021-12-22 08:21:11,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1705469543, now seen corresponding path program 1 times [2021-12-22 08:21:11,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:11,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074208476] [2021-12-22 08:21:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:11,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:11,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:21:11,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284027309] [2021-12-22 08:21:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:11,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:21:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:11,273 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) [2021-12-22 08:21:11,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:21:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:21:11,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:21:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:21:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:21:11,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:21:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:21:11,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:21:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074208476] [2021-12-22 08:21:11,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:21:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284027309] [2021-12-22 08:21:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284027309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:21:11,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:21:11,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-22 08:21:11,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192213739] [2021-12-22 08:21:11,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:21:11,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:21:11,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:21:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:21:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:21:11,448 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:21:11,536 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-12-22 08:21:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:21:11,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 08:21:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:21:11,537 INFO L225 Difference]: With dead ends: 47 [2021-12-22 08:21:11,537 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 08:21:11,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:21:11,538 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:21:11,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:21:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 08:21:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-22 08:21:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-22 08:21:11,542 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2021-12-22 08:21:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:21:11,542 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-22 08:21:11,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-22 08:21:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 08:21:11,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:11,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:11,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:21:11,752 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 [2021-12-22 08:21:11,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash 943008096, now seen corresponding path program 2 times [2021-12-22 08:21:11,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:11,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043289464] [2021-12-22 08:21:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:11,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:11,765 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:21:11,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013037961] [2021-12-22 08:21:11,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:21:11,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:21:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:11,767 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) [2021-12-22 08:21:11,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:21:11,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:21:11,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:21:11,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:21:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:21:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 08:21:11,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:21:11,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:21:11,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043289464] [2021-12-22 08:21:11,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:21:11,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013037961] [2021-12-22 08:21:11,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013037961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:21:11,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:21:11,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:21:11,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304154116] [2021-12-22 08:21:11,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:21:11,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:21:11,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:21:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:21:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:21:11,903 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:21:11,959 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-22 08:21:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:21:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 08:21:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:21:11,960 INFO L225 Difference]: With dead ends: 63 [2021-12-22 08:21:11,960 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 08:21:11,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:21:11,961 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:21:11,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:21:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 08:21:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-12-22 08:21:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-22 08:21:11,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2021-12-22 08:21:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:21:11,965 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-22 08:21:11,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-22 08:21:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 08:21:11,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:11,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:11,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:21:12,166 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 [2021-12-22 08:21:12,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash -645339806, now seen corresponding path program 1 times [2021-12-22 08:21:12,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:12,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527774564] [2021-12-22 08:21:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:12,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:12,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:21:12,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537180742] [2021-12-22 08:21:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:12,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:21:12,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:12,200 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) [2021-12-22 08:21:12,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 08:21:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:21:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:21:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:21:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 08:21:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:21:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 08:21:12,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:21:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527774564] [2021-12-22 08:21:12,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:21:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537180742] [2021-12-22 08:21:12,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537180742] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:21:12,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:21:12,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-22 08:21:12,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450646579] [2021-12-22 08:21:12,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:21:12,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:21:12,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:21:12,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:21:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:21:12,437 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:21:12,624 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-12-22 08:21:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 08:21:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 08:21:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:21:12,625 INFO L225 Difference]: With dead ends: 97 [2021-12-22 08:21:12,625 INFO L226 Difference]: Without dead ends: 75 [2021-12-22 08:21:12,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-12-22 08:21:12,626 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:21:12,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:21:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-22 08:21:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-12-22 08:21:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-22 08:21:12,634 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 26 [2021-12-22 08:21:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:21:12,634 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-22 08:21:12,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:21:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-22 08:21:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 08:21:12,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:21:12,635 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:21:12,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 08:21:12,836 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 [2021-12-22 08:21:12,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:21:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:21:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 2 times [2021-12-22 08:21:12,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:21:12,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451775276] [2021-12-22 08:21:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:21:12,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:21:12,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 08:21:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412885618] [2021-12-22 08:21:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:21:12,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:21:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:21:12,849 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) [2021-12-22 08:21:12,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 08:21:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:21:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:21:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-22 08:21:12,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:21:13,086 INFO L387 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 61 treesize of output 56 [2021-12-22 08:21:13,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 08:21:13,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 08:21:13,186 INFO L387 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 81 treesize of output 74 [2021-12-22 08:21:13,211 INFO L353 Elim1Store]: treesize reduction 154, result has 19.4 percent of original size [2021-12-22 08:21:13,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 98 [2021-12-22 08:21:13,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,225 INFO L387 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 50 treesize of output 22 [2021-12-22 08:21:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,257 INFO L387 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 72 treesize of output 27 [2021-12-22 08:21:13,486 INFO L387 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 98 treesize of output 89 [2021-12-22 08:21:13,520 INFO L353 Elim1Store]: treesize reduction 339, result has 18.9 percent of original size [2021-12-22 08:21:13,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 137 [2021-12-22 08:21:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,535 INFO L387 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 70 treesize of output 25 [2021-12-22 08:21:13,641 INFO L387 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 80 treesize of output 69 [2021-12-22 08:21:13,686 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2021-12-22 08:21:13,687 INFO L387 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 9 case distinctions, treesize of input 68 treesize of output 104 [2021-12-22 08:21:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:21:13,710 INFO L387 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 42 treesize of output 19 [2021-12-22 08:21:14,351 INFO L353 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-12-22 08:21:14,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 37 [2021-12-22 08:21:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:21:14,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:21:40,539 INFO L387 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 56 treesize of output 52 [2021-12-22 08:21:40,717 INFO L244 Elim1Store]: Index analysis took 137 ms [2021-12-22 08:21:41,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:21:41,031 INFO L387 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 52 treesize of output 59 [2021-12-22 08:21:41,049 INFO L387 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 19 treesize of output 4 [2021-12-22 08:21:41,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 4 [2021-12-22 08:21:52,220 WARN L227 SmtUtils]: Spent 9.66s on a formula simplification. DAG size of input: 141 DAG size of output: 81 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-22 08:21:52,223 INFO L353 Elim1Store]: treesize reduction 352, result has 40.9 percent of original size [2021-12-22 08:21:52,225 INFO L387 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 13764857 treesize of output 13191632 [2021-12-22 08:22:09,935 WARN L227 SmtUtils]: Spent 17.70s on a formula simplification that was a NOOP. DAG size: 1968 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-22 08:22:09,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:22:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451775276] [2021-12-22 08:22:09,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 08:22:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412885618] [2021-12-22 08:22:09,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-22 08:22:09,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:09,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-22 08:22:09,996 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-22 08:22:09,997 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-22 08:22:10,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 08:22:10,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:10,202 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 [2021-12-22 08:22:10,205 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2021-12-22 08:22:10,207 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 08:22:10,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 08:22:10 BoogieIcfgContainer [2021-12-22 08:22:10,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 08:22:10,234 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 08:22:10,237 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 08:22:10,238 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 08:22:10,238 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:21:10" (3/4) ... [2021-12-22 08:22:10,240 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 08:22:10,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 08:22:10,242 INFO L158 Benchmark]: Toolchain (without parser) took 60565.21ms. Allocated memory was 88.1MB in the beginning and 587.2MB in the end (delta: 499.1MB). Free memory was 58.0MB in the beginning and 243.0MB in the end (delta: -185.0MB). Peak memory consumption was 313.8MB. Max. memory is 16.1GB. [2021-12-22 08:22:10,242 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 47.1MB in the beginning and 47.0MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:22:10,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.67ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 57.8MB in the beginning and 83.8MB in the end (delta: -25.9MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-12-22 08:22:10,247 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.91ms. Allocated memory is still 107.0MB. Free memory was 83.8MB in the beginning and 82.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:22:10,248 INFO L158 Benchmark]: Boogie Preprocessor took 13.66ms. Allocated memory is still 107.0MB. Free memory was 82.0MB in the beginning and 80.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:22:10,248 INFO L158 Benchmark]: RCFGBuilder took 213.41ms. Allocated memory is still 107.0MB. Free memory was 80.9MB in the beginning and 70.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 08:22:10,248 INFO L158 Benchmark]: TraceAbstraction took 60139.48ms. Allocated memory was 107.0MB in the beginning and 587.2MB in the end (delta: 480.2MB). Free memory was 70.1MB in the beginning and 243.0MB in the end (delta: -172.9MB). Peak memory consumption was 342.2MB. Max. memory is 16.1GB. [2021-12-22 08:22:10,249 INFO L158 Benchmark]: Witness Printer took 7.71ms. Allocated memory is still 587.2MB. Free memory is still 243.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:22:10,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 47.1MB in the beginning and 47.0MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 148.67ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 57.8MB in the beginning and 83.8MB in the end (delta: -25.9MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.91ms. Allocated memory is still 107.0MB. Free memory was 83.8MB in the beginning and 82.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.66ms. Allocated memory is still 107.0MB. Free memory was 82.0MB in the beginning and 80.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 213.41ms. Allocated memory is still 107.0MB. Free memory was 80.9MB in the beginning and 70.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 60139.48ms. Allocated memory was 107.0MB in the beginning and 587.2MB in the end (delta: 480.2MB). Free memory was 70.1MB in the beginning and 243.0MB in the end (delta: -172.9MB). Peak memory consumption was 342.2MB. Max. memory is 16.1GB. * Witness Printer took 7.71ms. Allocated memory is still 587.2MB. Free memory is still 243.0MB. 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: 31]: 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: [L35] signed long long ARR_SIZE ; [L40] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L41] CALL assume_abort_if_not(ARR_SIZE > 1) [L29] COND FALSE !(!cond) [L41] RET assume_abort_if_not(ARR_SIZE > 1) [L43] int array[ARR_SIZE][ARR_SIZE] ; [L45] int row = 0, column = 0 ; [L46] signed long long sum = 0 ; [L48] row=0 [L48] 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 -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-12-22 08:22:12,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:22:12,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:22:12,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:22:12,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:22:12,545 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:22:12,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-22 08:22:12,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0b7ae3e/13834e395e5446de9cebec9e3eb5d605/FLAG05e3d7c16 [2021-12-22 08:22:12,949 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:22:12,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-22 08:22:12,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0b7ae3e/13834e395e5446de9cebec9e3eb5d605/FLAG05e3d7c16 [2021-12-22 08:22:12,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0b7ae3e/13834e395e5446de9cebec9e3eb5d605 [2021-12-22 08:22:12,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:22:12,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:22:12,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:22:12,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:22:12,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:22:12,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:22:12" (1/1) ... [2021-12-22 08:22:12,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363dad76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:12, skipping insertion in model container [2021-12-22 08:22:12,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:22:12" (1/1) ... [2021-12-22 08:22:12,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:22:12,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:22:13,103 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/array29_pattern.c[1255,1268] [2021-12-22 08:22:13,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:22:13,127 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:22:13,136 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/array29_pattern.c[1255,1268] [2021-12-22 08:22:13,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:22:13,193 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:22:13,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13 WrapperNode [2021-12-22 08:22:13,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:22:13,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:22:13,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:22:13,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:22:13,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,227 INFO L137 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-22 08:22:13,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:22:13,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:22:13,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:22:13,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:22:13,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:22:13,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:22:13,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:22:13,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:22:13,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (1/1) ... [2021-12-22 08:22:13,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:22:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:22:13,317 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) [2021-12-22 08:22:13,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:22:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:22:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 08:22:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:22:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 08:22:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:22:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:22:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:22:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 08:22:13,425 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:22:13,426 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:22:13,710 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:22:13,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:22:13,714 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 08:22:13,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:22:13 BoogieIcfgContainer [2021-12-22 08:22:13,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:22:13,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:22:13,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:22:13,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:22:13,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:22:12" (1/3) ... [2021-12-22 08:22:13,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8e8b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:22:13, skipping insertion in model container [2021-12-22 08:22:13,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:22:13" (2/3) ... [2021-12-22 08:22:13,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8e8b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:22:13, skipping insertion in model container [2021-12-22 08:22:13,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:22:13" (3/3) ... [2021-12-22 08:22:13,720 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-12-22 08:22:13,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:22:13,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:22:13,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:22:13,762 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 [2021-12-22 08:22:13,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:22:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 08:22:13,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:13,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:13,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-22 08:22:13,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821620453] [2021-12-22 08:22:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:13,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:13,817 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) [2021-12-22 08:22:13,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 08:22:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 08:22:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:14,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:22:14,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821620453] [2021-12-22 08:22:14,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821620453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:14,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:14,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:22:14,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059282178] [2021-12-22 08:22:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:14,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:22:14,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:22:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:22:14,059 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:14,073 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-22 08:22:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:22:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 08:22:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:14,084 INFO L225 Difference]: With dead ends: 41 [2021-12-22 08:22:14,085 INFO L226 Difference]: Without dead ends: 18 [2021-12-22 08:22:14,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:22:14,090 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-22 08:22:14,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:22:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-22 08:22:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-22 08:22:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-22 08:22:14,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-22 08:22:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:14,113 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-22 08:22:14,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-22 08:22:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 08:22:14,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:14,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:14,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:14,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:14,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-22 08:22:14,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521672545] [2021-12-22 08:22:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:14,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:14,323 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) [2021-12-22 08:22:14,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 08:22:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:22:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:14,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:22:14,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:14,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521672545] [2021-12-22 08:22:14,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521672545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:14,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:14,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:22:14,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406685919] [2021-12-22 08:22:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:14,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:22:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:22:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:14,598 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:14,615 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-12-22 08:22:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:22:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 08:22:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:14,616 INFO L225 Difference]: With dead ends: 28 [2021-12-22 08:22:14,616 INFO L226 Difference]: Without dead ends: 19 [2021-12-22 08:22:14,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:14,618 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:14,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-12-22 08:22:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-22 08:22:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-22 08:22:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-22 08:22:14,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2021-12-22 08:22:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:14,622 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-22 08:22:14,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-22 08:22:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 08:22:14,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:14,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:14,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-22 08:22:14,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:14,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1411380456, now seen corresponding path program 1 times [2021-12-22 08:22:14,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:14,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67641889] [2021-12-22 08:22:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:14,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:14,831 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) [2021-12-22 08:22:14,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 08:22:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:22:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:15,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:22:15,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:15,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67641889] [2021-12-22 08:22:15,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67641889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:15,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:15,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:22:15,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603784960] [2021-12-22 08:22:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:15,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:22:15,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:22:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:15,160 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:15,168 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-22 08:22:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:22:15,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 08:22:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:15,169 INFO L225 Difference]: With dead ends: 34 [2021-12-22 08:22:15,169 INFO L226 Difference]: Without dead ends: 20 [2021-12-22 08:22:15,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:15,170 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:15,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-22 08:22:15,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-22 08:22:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-22 08:22:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-22 08:22:15,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-12-22 08:22:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:15,178 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-22 08:22:15,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-22 08:22:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 08:22:15,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:15,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:15,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:15,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:15,389 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100115, now seen corresponding path program 1 times [2021-12-22 08:22:15,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:15,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099294892] [2021-12-22 08:22:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:15,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:15,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:15,392 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) [2021-12-22 08:22:15,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 08:22:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 08:22:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:15,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:15,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099294892] [2021-12-22 08:22:15,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099294892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:15,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:15,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-22 08:22:15,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408789811] [2021-12-22 08:22:15,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:15,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 08:22:15,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 08:22:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:22:15,900 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:16,204 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-12-22 08:22:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:22:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 08:22:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:16,206 INFO L225 Difference]: With dead ends: 37 [2021-12-22 08:22:16,206 INFO L226 Difference]: Without dead ends: 23 [2021-12-22 08:22:16,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:22:16,207 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:16,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2021-12-22 08:22:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-22 08:22:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-22 08:22:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-22 08:22:16,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2021-12-22 08:22:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:16,210 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-22 08:22:16,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-22 08:22:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 08:22:16,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:16,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:16,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:16,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:16,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1412127125, now seen corresponding path program 1 times [2021-12-22 08:22:16,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:16,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837105643] [2021-12-22 08:22:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:16,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:16,414 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) [2021-12-22 08:22:16,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 08:22:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:22:16,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:16,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:22:16,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837105643] [2021-12-22 08:22:16,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837105643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:16,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:16,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:22:16,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542440680] [2021-12-22 08:22:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:16,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:22:16,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:22:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:22:16,601 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:16,743 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-22 08:22:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:22:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 08:22:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:16,747 INFO L225 Difference]: With dead ends: 53 [2021-12-22 08:22:16,747 INFO L226 Difference]: Without dead ends: 39 [2021-12-22 08:22:16,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:22:16,748 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:16,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:22:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-22 08:22:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-12-22 08:22:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-22 08:22:16,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-12-22 08:22:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:16,751 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-22 08:22:16,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-22 08:22:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:22:16,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:16,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:16,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:16,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:16,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1387852488, now seen corresponding path program 2 times [2021-12-22 08:22:16,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50545924] [2021-12-22 08:22:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:16,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:16,963 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) [2021-12-22 08:22:16,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 08:22:17,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 08:22:17,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:22:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:17,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:22:17,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:17,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50545924] [2021-12-22 08:22:17,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50545924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:17,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:17,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:22:17,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159153203] [2021-12-22 08:22:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:17,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:22:17,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:22:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:17,341 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:17,351 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-12-22 08:22:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:22:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 08:22:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:17,353 INFO L225 Difference]: With dead ends: 34 [2021-12-22 08:22:17,355 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 08:22:17,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:17,357 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:17,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-22 08:22:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 08:22:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-22 08:22:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-22 08:22:17,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-12-22 08:22:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:17,368 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-22 08:22:17,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-22 08:22:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:22:17,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:17,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:17,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-22 08:22:17,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:17,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 994825478, now seen corresponding path program 1 times [2021-12-22 08:22:17,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506405976] [2021-12-22 08:22:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:17,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:17,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:17,593 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) [2021-12-22 08:22:17,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 08:22:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:17,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 08:22:17,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:18,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:22:18,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506405976] [2021-12-22 08:22:18,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506405976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:18,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:18,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-22 08:22:18,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108335389] [2021-12-22 08:22:18,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:18,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 08:22:18,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:18,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 08:22:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-12-22 08:22:18,430 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:18,887 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-12-22 08:22:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 08:22:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 08:22:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:18,903 INFO L225 Difference]: With dead ends: 57 [2021-12-22 08:22:18,903 INFO L226 Difference]: Without dead ends: 48 [2021-12-22 08:22:18,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-12-22 08:22:18,904 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:18,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-12-22 08:22:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-22 08:22:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-22 08:22:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2021-12-22 08:22:18,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 19 [2021-12-22 08:22:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:18,909 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2021-12-22 08:22:18,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-12-22 08:22:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 08:22:18,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:18,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:18,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-22 08:22:19,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:19,119 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash -712374820, now seen corresponding path program 1 times [2021-12-22 08:22:19,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709813029] [2021-12-22 08:22:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:19,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:19,124 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) [2021-12-22 08:22:19,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 08:22:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:22:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:22:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:22:19,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:19,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709813029] [2021-12-22 08:22:19,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709813029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:19,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:19,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 08:22:19,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830179273] [2021-12-22 08:22:19,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:19,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:22:19,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:22:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:22:19,340 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:19,605 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2021-12-22 08:22:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:22:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 08:22:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:19,606 INFO L225 Difference]: With dead ends: 115 [2021-12-22 08:22:19,606 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 08:22:19,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:22:19,606 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:19,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 67 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:22:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 08:22:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2021-12-22 08:22:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-12-22 08:22:19,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 22 [2021-12-22 08:22:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:19,616 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-12-22 08:22:19,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:19,616 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-12-22 08:22:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 08:22:19,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:19,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:19,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:19,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:19,830 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash 915876278, now seen corresponding path program 2 times [2021-12-22 08:22:19,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:19,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44426249] [2021-12-22 08:22:19,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:19,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:19,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:19,831 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) [2021-12-22 08:22:19,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 08:22:19,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 08:22:19,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:22:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:22:20,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:22:20,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:20,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44426249] [2021-12-22 08:22:20,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44426249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:22:20,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:22:20,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:22:20,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570671700] [2021-12-22 08:22:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:22:20,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:22:20,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:22:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:20,167 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:20,170 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-22 08:22:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:22:20,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 08:22:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:20,170 INFO L225 Difference]: With dead ends: 51 [2021-12-22 08:22:20,170 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 08:22:20,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:22:20,171 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:20,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-22 08:22:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 08:22:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-22 08:22:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-12-22 08:22:20,176 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 22 [2021-12-22 08:22:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:20,177 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-12-22 08:22:20,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-12-22 08:22:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 08:22:20,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:20,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:20,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-22 08:22:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:20,387 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 367280174, now seen corresponding path program 1 times [2021-12-22 08:22:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693914896] [2021-12-22 08:22:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:22:20,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:20,389 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) [2021-12-22 08:22:20,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 08:22:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:22:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 08:22:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:22:20,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:22:21,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:21,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693914896] [2021-12-22 08:22:21,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693914896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:21,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:21,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-22 08:22:21,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897358051] [2021-12-22 08:22:21,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:21,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 08:22:21,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 08:22:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-22 08:22:21,121 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:22:21,254 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-12-22 08:22:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 08:22:21,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 08:22:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:22:21,256 INFO L225 Difference]: With dead ends: 85 [2021-12-22 08:22:21,256 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 08:22:21,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:22:21,257 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:22:21,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-22 08:22:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 08:22:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-22 08:22:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-12-22 08:22:21,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 25 [2021-12-22 08:22:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:22:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-12-22 08:22:21,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:22:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-12-22 08:22:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:22:21,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:22:21,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:22:21,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 08:22:21,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:22:21,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:22:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:22:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1229230681, now seen corresponding path program 2 times [2021-12-22 08:22:21,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:22:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789474177] [2021-12-22 08:22:21,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:22:21,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:22:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:22:21,484 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) [2021-12-22 08:22:21,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 08:22:21,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:22:21,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:22:21,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 08:22:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:22:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:22,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:22:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:22:22,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:22:22,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789474177] [2021-12-22 08:22:22,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789474177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:22:22,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:22:22,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-22 08:22:22,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111705350] [2021-12-22 08:22:22,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:22:22,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 08:22:22,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:22:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 08:22:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:22:22,440 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)