./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/reducercommutativity/sep20-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:43:59,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:43:59,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:43:59,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:43:59,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:43:59,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:43:59,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:43:59,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:43:59,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:43:59,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:43:59,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:43:59,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:43:59,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:43:59,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:43:59,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:43:59,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:43:59,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:43:59,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:43:59,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:43:59,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:43:59,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:43:59,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:43:59,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:43:59,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:43:59,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:43:59,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:43:59,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:43:59,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:43:59,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:43:59,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:43:59,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:43:59,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:43:59,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:43:59,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:43:59,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:43:59,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:43:59,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:43:59,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:43:59,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:43:59,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:43:59,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:43:59,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:43:59,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:43:59,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:43:59,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:43:59,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:43:59,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:43:59,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:43:59,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:43:59,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:43:59,877 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:43:59,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:43:59,878 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:43:59,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:43:59,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:43:59,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:43:59,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:43:59,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:43:59,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:43:59,880 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:43:59,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:43:59,880 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:43:59,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:43:59,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:43:59,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:43:59,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:43:59,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:43:59,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:43:59,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:43:59,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:43:59,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:43:59,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:43:59,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:43:59,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:43:59,882 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:43:59,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:43:59,883 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:43:59,883 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2023-02-15 23:44:00,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:44:00,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:44:00,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:44:00,173 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:44:00,174 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:44:00,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2023-02-15 23:44:01,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:44:01,519 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:44:01,519 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2023-02-15 23:44:01,524 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd821984/e711504edef4476ca1a90490774d9472/FLAG00b15fafd [2023-02-15 23:44:01,535 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd821984/e711504edef4476ca1a90490774d9472 [2023-02-15 23:44:01,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:44:01,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:44:01,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:44:01,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:44:01,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:44:01,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9481813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01, skipping insertion in model container [2023-02-15 23:44:01,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:44:01,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:44:01,703 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2023-02-15 23:44:01,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:44:01,719 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:44:01,756 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2023-02-15 23:44:01,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:44:01,772 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:44:01,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01 WrapperNode [2023-02-15 23:44:01,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:44:01,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:44:01,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:44:01,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:44:01,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,815 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 23:44:01,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:44:01,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:44:01,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:44:01,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:44:01,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:44:01,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:44:01,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:44:01,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:44:01,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (1/1) ... [2023-02-15 23:44:01,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:44:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:01,896 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) [2023-02-15 23:44:01,917 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 [2023-02-15 23:44:01,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:44:01,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:44:01,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:44:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:44:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:44:01,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:44:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:44:01,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:44:01,943 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-15 23:44:01,943 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-15 23:44:02,016 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:44:02,018 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:44:02,148 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:44:02,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:44:02,154 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 23:44:02,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:44:02 BoogieIcfgContainer [2023-02-15 23:44:02,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:44:02,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:44:02,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:44:02,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:44:02,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:44:01" (1/3) ... [2023-02-15 23:44:02,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9f02df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:44:02, skipping insertion in model container [2023-02-15 23:44:02,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:44:01" (2/3) ... [2023-02-15 23:44:02,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9f02df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:44:02, skipping insertion in model container [2023-02-15 23:44:02,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:44:02" (3/3) ... [2023-02-15 23:44:02,164 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2023-02-15 23:44:02,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:44:02,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:44:02,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:44:02,218 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6069a2b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:44:02,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:44:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 23:44:02,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:02,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:02,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2023-02-15 23:44:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472955281] [2023-02-15 23:44:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:02,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:44:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 23:44:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 23:44:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:44:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472955281] [2023-02-15 23:44:02,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472955281] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:44:02,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:44:02,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 23:44:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994041375] [2023-02-15 23:44:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:44:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:44:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:44:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:44:02,659 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 23:44:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:02,685 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-15 23:44:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:44:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 23:44:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:02,708 INFO L225 Difference]: With dead ends: 52 [2023-02-15 23:44:02,708 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 23:44:02,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:44:02,714 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:02,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 23:44:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 23:44:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-15 23:44:02,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-02-15 23:44:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:02,761 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-15 23:44:02,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 23:44:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-15 23:44:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 23:44:02,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:02,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:02,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 23:44:02,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2023-02-15 23:44:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:02,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490779330] [2023-02-15 23:44:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:02,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:44:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:44:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 23:44:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:44:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:02,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490779330] [2023-02-15 23:44:02,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490779330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:02,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899997687] [2023-02-15 23:44:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:03,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:03,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:03,003 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) [2023-02-15 23:44:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 23:44:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 23:44:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:44:03,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:44:03,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899997687] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:44:03,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:44:03,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 23:44:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84458978] [2023-02-15 23:44:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:44:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:44:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:44:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:44:03,136 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:44:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:03,147 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-02-15 23:44:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:44:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-15 23:44:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:03,149 INFO L225 Difference]: With dead ends: 45 [2023-02-15 23:44:03,149 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 23:44:03,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:44:03,151 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:03,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 23:44:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-15 23:44:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-15 23:44:03,157 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2023-02-15 23:44:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:03,157 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-15 23:44:03,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:44:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-15 23:44:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 23:44:03,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:03,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:03,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:03,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:03,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:03,368 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2023-02-15 23:44:03,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:03,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085374333] [2023-02-15 23:44:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:03,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:44:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:03,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 23:44:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:03,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 23:44:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 23:44:03,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085374333] [2023-02-15 23:44:03,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085374333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:03,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096891165] [2023-02-15 23:44:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:03,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:03,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:03,585 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) [2023-02-15 23:44:03,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 23:44:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 23:44:03,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 23:44:03,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:44:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096891165] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:44:03,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:44:03,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-15 23:44:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129593798] [2023-02-15 23:44:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:44:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:44:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:44:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:44:03,701 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:44:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:03,717 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-15 23:44:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:44:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-15 23:44:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:03,719 INFO L225 Difference]: With dead ends: 41 [2023-02-15 23:44:03,719 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 23:44:03,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:44:03,720 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:03,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 23:44:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-15 23:44:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-15 23:44:03,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2023-02-15 23:44:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:03,730 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-15 23:44:03,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:44:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-15 23:44:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 23:44:03,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:03,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:03,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:03,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 23:44:03,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2023-02-15 23:44:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:03,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709242439] [2023-02-15 23:44:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:03,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:44:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 23:44:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 23:44:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:44:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:04,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709242439] [2023-02-15 23:44:04,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709242439] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931131157] [2023-02-15 23:44:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:04,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:04,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:04,068 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) [2023-02-15 23:44:04,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 23:44:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:44:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:44:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:44:04,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931131157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:04,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:04,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-15 23:44:04,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404794339] [2023-02-15 23:44:04,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:04,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 23:44:04,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 23:44:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:44:04,214 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 23:44:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:04,254 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-15 23:44:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 23:44:04,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-15 23:44:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:04,258 INFO L225 Difference]: With dead ends: 58 [2023-02-15 23:44:04,258 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 23:44:04,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:44:04,263 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:04,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 23:44:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-15 23:44:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-15 23:44:04,269 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2023-02-15 23:44:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:04,269 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-15 23:44:04,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 23:44:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-15 23:44:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 23:44:04,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:04,271 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:04,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 23:44:04,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:04,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2023-02-15 23:44:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:04,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165313549] [2023-02-15 23:44:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:04,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 23:44:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:44:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 23:44:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-15 23:44:04,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:04,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165313549] [2023-02-15 23:44:04,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165313549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:04,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694505301] [2023-02-15 23:44:04,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:44:04,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:04,609 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) [2023-02-15 23:44:04,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 23:44:04,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:44:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 23:44:04,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 23:44:04,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 23:44:04,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694505301] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:04,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:04,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-15 23:44:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035381233] [2023-02-15 23:44:04,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:04,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 23:44:04,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 23:44:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 23:44:04,811 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 23:44:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:04,871 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2023-02-15 23:44:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 23:44:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-02-15 23:44:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:04,874 INFO L225 Difference]: With dead ends: 74 [2023-02-15 23:44:04,875 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 23:44:04,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 23:44:04,876 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:04,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 23:44:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-15 23:44:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-02-15 23:44:04,899 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2023-02-15 23:44:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:04,900 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-02-15 23:44:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 23:44:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-02-15 23:44:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 23:44:04,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:04,906 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:04,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:05,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2023-02-15 23:44:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:05,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244389445] [2023-02-15 23:44:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 23:44:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:05,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 23:44:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:05,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 23:44:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 23:44:05,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244389445] [2023-02-15 23:44:05,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244389445] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001799704] [2023-02-15 23:44:05,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:44:05,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:05,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:05,372 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) [2023-02-15 23:44:05,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 23:44:05,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 23:44:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:44:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-15 23:44:05,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-15 23:44:05,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001799704] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:05,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:05,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-15 23:44:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232432960] [2023-02-15 23:44:05,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 23:44:05,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:05,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 23:44:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 23:44:05,581 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:44:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:05,650 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2023-02-15 23:44:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 23:44:05,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-02-15 23:44:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:05,652 INFO L225 Difference]: With dead ends: 90 [2023-02-15 23:44:05,652 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 23:44:05,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 23:44:05,653 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:05,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:44:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 23:44:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-15 23:44:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-15 23:44:05,658 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2023-02-15 23:44:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:05,659 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-15 23:44:05,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:44:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-15 23:44:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 23:44:05,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:05,660 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:05,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:05,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:05,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:05,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2023-02-15 23:44:05,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:05,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414516038] [2023-02-15 23:44:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:05,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:06,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 23:44:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 23:44:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 23:44:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 23:44:06,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414516038] [2023-02-15 23:44:06,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414516038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300233182] [2023-02-15 23:44:06,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:44:06,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:06,237 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) [2023-02-15 23:44:06,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 23:44:06,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:44:06,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:06,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 23:44:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 23:44:06,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 23:44:06,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300233182] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:06,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:06,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-02-15 23:44:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721267571] [2023-02-15 23:44:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 23:44:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 23:44:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-15 23:44:06,614 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 23:44:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:06,675 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2023-02-15 23:44:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 23:44:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2023-02-15 23:44:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:06,677 INFO L225 Difference]: With dead ends: 119 [2023-02-15 23:44:06,677 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 23:44:06,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-15 23:44:06,680 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:06,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 23:44:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-15 23:44:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-02-15 23:44:06,699 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2023-02-15 23:44:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-02-15 23:44:06,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 23:44:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-02-15 23:44:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-15 23:44:06,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:06,701 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:06,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:06,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:06,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2023-02-15 23:44:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:06,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439131310] [2023-02-15 23:44:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:06,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:07,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 23:44:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:07,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-15 23:44:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2023-02-15 23:44:07,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:07,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439131310] [2023-02-15 23:44:07,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439131310] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093228626] [2023-02-15 23:44:07,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:44:07,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:07,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:07,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 23:44:09,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-02-15 23:44:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:44:09,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2023-02-15 23:44:09,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2023-02-15 23:44:09,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093228626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:09,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:09,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 23:44:09,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273452294] [2023-02-15 23:44:09,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:09,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 23:44:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 23:44:09,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 23:44:09,594 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 23:44:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:09,644 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2023-02-15 23:44:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 23:44:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2023-02-15 23:44:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:09,646 INFO L225 Difference]: With dead ends: 142 [2023-02-15 23:44:09,646 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 23:44:09,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 23:44:09,647 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:09,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 96 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 23:44:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-15 23:44:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-02-15 23:44:09,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2023-02-15 23:44:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:09,653 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-02-15 23:44:09,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 23:44:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-02-15 23:44:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-02-15 23:44:09,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:09,656 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:09,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 23:44:09,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:09,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:09,857 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2023-02-15 23:44:09,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:09,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510622276] [2023-02-15 23:44:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:10,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-15 23:44:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:10,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-02-15 23:44:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2023-02-15 23:44:10,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:10,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510622276] [2023-02-15 23:44:10,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510622276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:10,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117652574] [2023-02-15 23:44:10,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 23:44:10,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:10,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:10,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:10,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 23:44:10,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 23:44:10,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:44:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2023-02-15 23:44:10,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2023-02-15 23:44:10,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117652574] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:10,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:10,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-02-15 23:44:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611617766] [2023-02-15 23:44:10,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 23:44:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 23:44:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-15 23:44:10,996 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:44:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:11,065 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2023-02-15 23:44:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 23:44:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2023-02-15 23:44:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:11,070 INFO L225 Difference]: With dead ends: 179 [2023-02-15 23:44:11,070 INFO L226 Difference]: Without dead ends: 118 [2023-02-15 23:44:11,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-15 23:44:11,073 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:11,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 236 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-15 23:44:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-02-15 23:44:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2023-02-15 23:44:11,091 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2023-02-15 23:44:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:11,091 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2023-02-15 23:44:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:44:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2023-02-15 23:44:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-02-15 23:44:11,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:11,096 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:11,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:11,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 23:44:11,302 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:11,302 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2023-02-15 23:44:11,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:11,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572675266] [2023-02-15 23:44:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:11,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:12,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 23:44:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:12,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-02-15 23:44:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-02-15 23:44:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572675266] [2023-02-15 23:44:12,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572675266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461476641] [2023-02-15 23:44:12,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 23:44:12,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:12,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:12,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:12,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 23:44:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 23:44:12,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2023-02-15 23:44:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-02-15 23:44:12,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461476641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:12,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:12,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2023-02-15 23:44:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886129037] [2023-02-15 23:44:12,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 23:44:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 23:44:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:44:12,712 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 23:44:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:12,774 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2023-02-15 23:44:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 23:44:12,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2023-02-15 23:44:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:12,777 INFO L225 Difference]: With dead ends: 203 [2023-02-15 23:44:12,777 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 23:44:12,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 420 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:44:12,778 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:12,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 152 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 23:44:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-02-15 23:44:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2023-02-15 23:44:12,787 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2023-02-15 23:44:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:12,789 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2023-02-15 23:44:12,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 23:44:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2023-02-15 23:44:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-15 23:44:12,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:12,792 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:12,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 23:44:12,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2023-02-15 23:44:13,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543375550] [2023-02-15 23:44:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:13,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:13,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:13,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 23:44:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2023-02-15 23:44:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 23:44:13,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:13,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543375550] [2023-02-15 23:44:13,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543375550] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:13,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061759888] [2023-02-15 23:44:13,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:44:13,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:13,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:13,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:13,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 23:44:13,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:44:13,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:13,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:44:13,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2023-02-15 23:44:13,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 23:44:13,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061759888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:13,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:13,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 23:44:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972350521] [2023-02-15 23:44:13,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 23:44:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 23:44:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:44:13,834 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:44:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:13,880 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2023-02-15 23:44:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 23:44:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2023-02-15 23:44:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:13,882 INFO L225 Difference]: With dead ends: 218 [2023-02-15 23:44:13,882 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 23:44:13,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:44:13,883 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:13,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 23:44:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-15 23:44:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2023-02-15 23:44:13,889 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2023-02-15 23:44:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:13,889 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2023-02-15 23:44:13,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:44:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2023-02-15 23:44:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-02-15 23:44:13,892 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:13,893 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:13,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:14,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 23:44:14,100 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2023-02-15 23:44:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:14,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865292762] [2023-02-15 23:44:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:14,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 23:44:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-02-15 23:44:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 23:44:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865292762] [2023-02-15 23:44:14,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865292762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126013319] [2023-02-15 23:44:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:44:14,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:14,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:14,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 23:44:19,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-15 23:44:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 23:44:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2023-02-15 23:44:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 23:44:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126013319] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:19,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:19,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-15 23:44:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815149105] [2023-02-15 23:44:19,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:19,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 23:44:19,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 23:44:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:44:19,625 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:44:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:19,675 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2023-02-15 23:44:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 23:44:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2023-02-15 23:44:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:19,677 INFO L225 Difference]: With dead ends: 228 [2023-02-15 23:44:19,677 INFO L226 Difference]: Without dead ends: 157 [2023-02-15 23:44:19,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 542 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:44:19,678 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:19,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 72 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:44:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-15 23:44:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-15 23:44:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:44:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2023-02-15 23:44:19,684 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2023-02-15 23:44:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:19,685 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2023-02-15 23:44:19,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:44:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2023-02-15 23:44:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 23:44:19,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:19,688 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:19,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:19,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 23:44:19,898 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2023-02-15 23:44:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:19,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083945662] [2023-02-15 23:44:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:26,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 23:44:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 23:44:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2023-02-15 23:44:29,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:29,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083945662] [2023-02-15 23:44:29,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083945662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:29,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285216056] [2023-02-15 23:44:29,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:44:29,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:29,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:29,429 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:29,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 23:44:29,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:44:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:29,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 146 conjunts are in the unsatisfiable core [2023-02-15 23:44:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2023-02-15 23:44:31,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5314 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2023-02-15 23:44:33,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285216056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:33,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:33,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 31] total 94 [2023-02-15 23:44:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965061596] [2023-02-15 23:44:33,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-02-15 23:44:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-02-15 23:44:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=8452, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 23:44:33,606 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 94 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 87 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 23:44:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:39,851 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2023-02-15 23:44:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 23:44:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 87 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 286 [2023-02-15 23:44:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:39,863 INFO L225 Difference]: With dead ends: 902 [2023-02-15 23:44:39,864 INFO L226 Difference]: Without dead ends: 898 [2023-02-15 23:44:39,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 558 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=317, Invalid=8995, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 23:44:39,868 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 192 mSDsluCounter, 6228 mSDsCounter, 0 mSdLazyCounter, 12410 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 6353 SdHoareTripleChecker+Invalid, 12547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 12410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:39,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 6353 Invalid, 12547 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [137 Valid, 12410 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-02-15 23:44:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-02-15 23:44:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2023-02-15 23:44:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 23:44:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2023-02-15 23:44:39,980 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2023-02-15 23:44:39,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:39,981 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2023-02-15 23:44:39,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 87 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 23:44:39,981 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2023-02-15 23:44:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 23:44:39,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:39,988 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:40,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 23:44:40,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 23:44:40,198 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2023-02-15 23:44:40,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:40,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675022459] [2023-02-15 23:44:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:40,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:44:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:47,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 23:44:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:47,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 23:44:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2023-02-15 23:44:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675022459] [2023-02-15 23:44:48,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675022459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070256901] [2023-02-15 23:44:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:48,220 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:48,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 23:44:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:48,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 23:44:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:48,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 23:44:49,366 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 11 [2023-02-15 23:44:49,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 23:44:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2491 proven. 1872 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2023-02-15 23:44:51,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2566 proven. 1795 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2023-02-15 23:44:54,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070256901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:54,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:54,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 32, 30] total 106 [2023-02-15 23:44:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410450173] [2023-02-15 23:44:54,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:54,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-02-15 23:44:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-02-15 23:44:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=10746, Unknown=0, NotChecked=0, Total=11130 [2023-02-15 23:44:54,550 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 23:45:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:45:11,791 INFO L93 Difference]: Finished difference Result 3097 states and 4235 transitions. [2023-02-15 23:45:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2023-02-15 23:45:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2023-02-15 23:45:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:45:11,804 INFO L225 Difference]: With dead ends: 3097 [2023-02-15 23:45:11,804 INFO L226 Difference]: Without dead ends: 2382 [2023-02-15 23:45:11,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 644 SyntacticMatches, 6 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20887 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=2724, Invalid=71532, Unknown=0, NotChecked=0, Total=74256 [2023-02-15 23:45:11,823 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 631 mSDsluCounter, 3927 mSDsCounter, 0 mSdLazyCounter, 9213 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 4023 SdHoareTripleChecker+Invalid, 9304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:45:11,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 4023 Invalid, 9304 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [91 Valid, 9213 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-02-15 23:45:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2023-02-15 23:45:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1597. [2023-02-15 23:45:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1578 states have (on average 1.3193916349809887) internal successors, (2082), 1581 states have internal predecessors, (2082), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2023-02-15 23:45:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2127 transitions. [2023-02-15 23:45:11,966 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2127 transitions. Word has length 286 [2023-02-15 23:45:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:45:11,967 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2127 transitions. [2023-02-15 23:45:11,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 23:45:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2127 transitions. [2023-02-15 23:45:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 23:45:11,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:45:11,982 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:45:11,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 23:45:12,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 23:45:12,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:45:12,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:45:12,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2023-02-15 23:45:12,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:45:12,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882392348] [2023-02-15 23:45:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:45:12,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:45:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:24,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:45:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 23:45:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:25,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 23:45:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-15 23:45:26,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:45:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882392348] [2023-02-15 23:45:26,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882392348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:45:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542075508] [2023-02-15 23:45:26,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:45:26,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:45:26,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:45:26,829 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:45:26,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 23:45:27,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:45:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:45:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 224 conjunts are in the unsatisfiable core [2023-02-15 23:45:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:45:27,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 23:45:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:27,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:27,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:27,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:27,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:27,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:45:28,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:45:28,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-02-15 23:45:28,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 23:45:28,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2023-02-15 23:45:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2545 proven. 3127 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2023-02-15 23:45:30,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:45:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2620 proven. 2651 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2023-02-15 23:45:47,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542075508] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:45:47,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:45:47,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 88, 84] total 175 [2023-02-15 23:45:47,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793557720] [2023-02-15 23:45:47,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:45:47,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2023-02-15 23:45:47,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:45:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2023-02-15 23:45:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=29703, Unknown=0, NotChecked=0, Total=30450 [2023-02-15 23:45:47,183 INFO L87 Difference]: Start difference. First operand 1597 states and 2127 transitions. Second operand has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 23:46:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:46:11,958 INFO L93 Difference]: Finished difference Result 7082 states and 9772 transitions. [2023-02-15 23:46:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-02-15 23:46:11,959 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2023-02-15 23:46:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:46:11,983 INFO L225 Difference]: With dead ends: 7082 [2023-02-15 23:46:11,984 INFO L226 Difference]: Without dead ends: 5027 [2023-02-15 23:46:11,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 504 SyntacticMatches, 35 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13662 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=2094, Invalid=45648, Unknown=0, NotChecked=0, Total=47742 [2023-02-15 23:46:11,997 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 374 mSDsluCounter, 12430 mSDsCounter, 0 mSdLazyCounter, 26476 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 12569 SdHoareTripleChecker+Invalid, 26588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 26476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-02-15 23:46:11,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 12569 Invalid, 26588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [112 Valid, 26476 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2023-02-15 23:46:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2023-02-15 23:46:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 3257. [2023-02-15 23:46:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3220 states have (on average 1.3217391304347825) internal successors, (4256), 3226 states have internal predecessors, (4256), 19 states have call successors, (19), 11 states have call predecessors, (19), 17 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2023-02-15 23:46:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4366 transitions. [2023-02-15 23:46:12,323 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4366 transitions. Word has length 286 [2023-02-15 23:46:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:46:12,324 INFO L495 AbstractCegarLoop]: Abstraction has 3257 states and 4366 transitions. [2023-02-15 23:46:12,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 23:46:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4366 transitions. [2023-02-15 23:46:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 23:46:12,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:46:12,346 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:46:12,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 23:46:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:46:12,555 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:46:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:46:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2023-02-15 23:46:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:46:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010656263] [2023-02-15 23:46:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:46:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:46:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:22,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:46:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:24,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 23:46:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 23:46:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4374 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2023-02-15 23:46:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:46:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010656263] [2023-02-15 23:46:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010656263] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:46:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160114896] [2023-02-15 23:46:24,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:46:24,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:46:24,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:46:24,656 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:46:24,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 23:46:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-02-15 23:46:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:46:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 195 conjunts are in the unsatisfiable core [2023-02-15 23:46:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:46:38,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 23:46:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:46:39,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 23:46:39,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 23:46:39,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-02-15 23:46:39,485 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 23:46:39,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2023-02-15 23:46:39,661 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 23:46:39,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2023-02-15 23:46:39,761 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 23:46:39,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2023-02-15 23:46:39,869 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 23:46:39,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2023-02-15 23:46:39,971 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 23:46:39,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2023-02-15 23:46:40,062 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 23:46:40,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2023-02-15 23:46:40,148 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-02-15 23:46:40,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 50 [2023-02-15 23:46:40,353 INFO L321 Elim1Store]: treesize reduction 36, result has 41.9 percent of original size [2023-02-15 23:46:40,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 80 [2023-02-15 23:46:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:46:40,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:46:40,712 INFO L321 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2023-02-15 23:46:40,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 123 treesize of output 106 [2023-02-15 23:46:40,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-02-15 23:46:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2456 proven. 2785 refuted. 1 times theorem prover too weak. 1024 trivial. 0 not checked. [2023-02-15 23:46:45,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:46:46,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160114896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:46:46,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 23:46:46,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 65] total 115 [2023-02-15 23:46:46,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072182711] [2023-02-15 23:46:46,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 23:46:46,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-02-15 23:46:46,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:46:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-02-15 23:46:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=12767, Unknown=3, NotChecked=0, Total=13340 [2023-02-15 23:46:46,401 INFO L87 Difference]: Start difference. First operand 3257 states and 4366 transitions. Second operand has 115 states, 115 states have (on average 2.2869565217391306) internal successors, (263), 114 states have internal predecessors, (263), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)