./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/loop-simple/nested_6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 00:09:43,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 00:09:43,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 00:09:43,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 00:09:43,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 00:09:43,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 00:09:43,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 00:09:43,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 00:09:43,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 00:09:43,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 00:09:43,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 00:09:43,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 00:09:43,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 00:09:43,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 00:09:43,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 00:09:43,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 00:09:43,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 00:09:43,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 00:09:43,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 00:09:43,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 00:09:43,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 00:09:43,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 00:09:43,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 00:09:43,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 00:09:43,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 00:09:43,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 00:09:43,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 00:09:43,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 00:09:43,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 00:09:43,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 00:09:43,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 00:09:43,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 00:09:43,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 00:09:43,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 00:09:43,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 00:09:43,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 00:09:43,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 00:09:43,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 00:09:43,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 00:09:43,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 00:09:43,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 00:09:43,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 00:09:43,934 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 00:09:43,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 00:09:43,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 00:09:43,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 00:09:43,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 00:09:43,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 00:09:43,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 00:09:43,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 00:09:43,936 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 00:09:43,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 00:09:43,937 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 00:09:43,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 00:09:43,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 00:09:43,938 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 00:09:43,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 00:09:43,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 00:09:43,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 00:09:43,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 00:09:43,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:09:43,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 00:09:43,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 00:09:43,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 00:09:43,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 00:09:43,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 00:09:43,940 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 00:09:43,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 00:09:43,941 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 00:09:43,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 00:09:43,941 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 00:09:43,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be [2023-02-14 00:09:44,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 00:09:44,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 00:09:44,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 00:09:44,212 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 00:09:44,212 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 00:09:44,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_6.c [2023-02-14 00:09:45,300 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 00:09:45,448 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 00:09:45,448 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_6.c [2023-02-14 00:09:45,452 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddaa8d94c/97fec4c0cb0d4750bc59a8023d9d27e3/FLAG703f31749 [2023-02-14 00:09:45,461 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddaa8d94c/97fec4c0cb0d4750bc59a8023d9d27e3 [2023-02-14 00:09:45,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 00:09:45,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 00:09:45,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 00:09:45,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 00:09:45,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 00:09:45,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b3f9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45, skipping insertion in model container [2023-02-14 00:09:45,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 00:09:45,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 00:09:45,568 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/loop-simple/nested_6.c[959,972] [2023-02-14 00:09:45,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:09:45,577 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 00:09:45,590 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/loop-simple/nested_6.c[959,972] [2023-02-14 00:09:45,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:09:45,599 INFO L208 MainTranslator]: Completed translation [2023-02-14 00:09:45,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45 WrapperNode [2023-02-14 00:09:45,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 00:09:45,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 00:09:45,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 00:09:45,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 00:09:45,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,620 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-02-14 00:09:45,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 00:09:45,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 00:09:45,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 00:09:45,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 00:09:45,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,632 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 00:09:45,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 00:09:45,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 00:09:45,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 00:09:45,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (1/1) ... [2023-02-14 00:09:45,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:09:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:09:45,657 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) [2023-02-14 00:09:45,659 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 [2023-02-14 00:09:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 00:09:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 00:09:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 00:09:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 00:09:45,726 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 00:09:45,727 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 00:09:45,812 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 00:09:45,817 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 00:09:45,817 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-14 00:09:45,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:09:45 BoogieIcfgContainer [2023-02-14 00:09:45,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 00:09:45,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 00:09:45,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 00:09:45,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 00:09:45,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:09:45" (1/3) ... [2023-02-14 00:09:45,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b5d8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:09:45, skipping insertion in model container [2023-02-14 00:09:45,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:09:45" (2/3) ... [2023-02-14 00:09:45,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b5d8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:09:45, skipping insertion in model container [2023-02-14 00:09:45,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:09:45" (3/3) ... [2023-02-14 00:09:45,825 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_6.c [2023-02-14 00:09:45,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 00:09:45,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 00:09:45,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 00:09:45,871 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;@1e73da7d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 00:09:45,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 00:09:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-14 00:09:45,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:45,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-14 00:09:45,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash 28698918, now seen corresponding path program 1 times [2023-02-14 00:09:45,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:45,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573491199] [2023-02-14 00:09:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:45,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573491199] [2023-02-14 00:09:46,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573491199] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:09:46,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:09:46,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:09:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374777588] [2023-02-14 00:09:46,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 00:09:46,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 00:09:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,112 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,165 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2023-02-14 00:09:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 00:09:46,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-14 00:09:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,172 INFO L225 Difference]: With dead ends: 52 [2023-02-14 00:09:46,172 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 00:09:46,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,191 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 00:09:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2023-02-14 00:09:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-02-14 00:09:46,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 5 [2023-02-14 00:09:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,232 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-02-14 00:09:46,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-02-14 00:09:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 00:09:46,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 00:09:46,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash 270775882, now seen corresponding path program 1 times [2023-02-14 00:09:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788780132] [2023-02-14 00:09:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788780132] [2023-02-14 00:09:46,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788780132] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:09:46,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:09:46,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:09:46,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985700946] [2023-02-14 00:09:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 00:09:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 00:09:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,304 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,324 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-02-14 00:09:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 00:09:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 00:09:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,325 INFO L225 Difference]: With dead ends: 43 [2023-02-14 00:09:46,325 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 00:09:46,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,327 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 00:09:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-02-14 00:09:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-14 00:09:46,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2023-02-14 00:09:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,333 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-14 00:09:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-14 00:09:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 00:09:46,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 00:09:46,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1936160826, now seen corresponding path program 1 times [2023-02-14 00:09:46,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:46,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347123517] [2023-02-14 00:09:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347123517] [2023-02-14 00:09:46,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347123517] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:09:46,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:09:46,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:09:46,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480790309] [2023-02-14 00:09:46,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 00:09:46,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 00:09:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,399 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,443 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-02-14 00:09:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 00:09:46,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 00:09:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,445 INFO L225 Difference]: With dead ends: 43 [2023-02-14 00:09:46,445 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 00:09:46,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,447 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 00:09:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-02-14 00:09:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-02-14 00:09:46,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2023-02-14 00:09:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,459 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-02-14 00:09:46,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-02-14 00:09:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 00:09:46,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 00:09:46,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1227454858, now seen corresponding path program 1 times [2023-02-14 00:09:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:46,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13604634] [2023-02-14 00:09:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13604634] [2023-02-14 00:09:46,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13604634] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:09:46,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:09:46,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:09:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745200278] [2023-02-14 00:09:46,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 00:09:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 00:09:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,564 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,579 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-02-14 00:09:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 00:09:46,580 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-14 00:09:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,580 INFO L225 Difference]: With dead ends: 43 [2023-02-14 00:09:46,581 INFO L226 Difference]: Without dead ends: 26 [2023-02-14 00:09:46,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,582 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-14 00:09:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-02-14 00:09:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-02-14 00:09:46,600 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2023-02-14 00:09:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,600 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-02-14 00:09:46,600 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-02-14 00:09:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 00:09:46,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 00:09:46,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1691120258, now seen corresponding path program 1 times [2023-02-14 00:09:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:46,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219651030] [2023-02-14 00:09:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219651030] [2023-02-14 00:09:46,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219651030] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:09:46,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:09:46,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:09:46,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112918108] [2023-02-14 00:09:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 00:09:46,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 00:09:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,638 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,648 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-14 00:09:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 00:09:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-14 00:09:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,649 INFO L225 Difference]: With dead ends: 43 [2023-02-14 00:09:46,649 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 00:09:46,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,650 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 00:09:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-02-14 00:09:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-02-14 00:09:46,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2023-02-14 00:09:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,654 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-02-14 00:09:46,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-02-14 00:09:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 00:09:46,655 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 00:09:46,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1077656366, now seen corresponding path program 1 times [2023-02-14 00:09:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106355667] [2023-02-14 00:09:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106355667] [2023-02-14 00:09:46,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106355667] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:09:46,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:09:46,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:09:46,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005982620] [2023-02-14 00:09:46,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 00:09:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 00:09:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,692 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,705 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-02-14 00:09:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 00:09:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-14 00:09:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,706 INFO L225 Difference]: With dead ends: 43 [2023-02-14 00:09:46,706 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 00:09:46,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 00:09:46,709 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 00:09:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-02-14 00:09:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-02-14 00:09:46,721 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2023-02-14 00:09:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,722 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-02-14 00:09:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-02-14 00:09:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 00:09:46,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 00:09:46,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash -624839792, now seen corresponding path program 1 times [2023-02-14 00:09:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:46,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782689133] [2023-02-14 00:09:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:46,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782689133] [2023-02-14 00:09:46,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782689133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:09:46,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326976620] [2023-02-14 00:09:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:46,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:09:46,760 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) [2023-02-14 00:09:46,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 00:09:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 00:09:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:09:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:09:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:46,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326976620] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:09:46,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:09:46,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 00:09:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097794917] [2023-02-14 00:09:46,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:09:46,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 00:09:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 00:09:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 00:09:46,876 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:46,898 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-02-14 00:09:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:09:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 00:09:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:46,899 INFO L225 Difference]: With dead ends: 49 [2023-02-14 00:09:46,900 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 00:09:46,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 00:09:46,902 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:46,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 00:09:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 00:09:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-02-14 00:09:46,912 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2023-02-14 00:09:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:46,913 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-02-14 00:09:46,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-02-14 00:09:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 00:09:46,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:46,914 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:46,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 00:09:47,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:47,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -222481718, now seen corresponding path program 2 times [2023-02-14 00:09:47,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:47,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513721032] [2023-02-14 00:09:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:47,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 00:09:47,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:47,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513721032] [2023-02-14 00:09:47,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513721032] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:09:47,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154739660] [2023-02-14 00:09:47,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:09:47,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:47,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:09:47,200 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) [2023-02-14 00:09:47,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 00:09:47,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:09:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:09:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 00:09:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:09:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:47,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:09:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 00:09:47,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154739660] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:09:47,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:09:47,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2023-02-14 00:09:47,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78135259] [2023-02-14 00:09:47,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:09:47,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 00:09:47,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 00:09:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 00:09:47,330 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:47,495 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2023-02-14 00:09:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 00:09:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-14 00:09:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:47,496 INFO L225 Difference]: With dead ends: 88 [2023-02-14 00:09:47,496 INFO L226 Difference]: Without dead ends: 62 [2023-02-14 00:09:47,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2023-02-14 00:09:47,497 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:47,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 91 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 00:09:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-14 00:09:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2023-02-14 00:09:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-02-14 00:09:47,502 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2023-02-14 00:09:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:47,502 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-02-14 00:09:47,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-02-14 00:09:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 00:09:47,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:47,504 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:09:47,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 00:09:47,708 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,SelfDestructingSolverStorable7 [2023-02-14 00:09:47,709 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1455035518, now seen corresponding path program 3 times [2023-02-14 00:09:47,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:47,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083605259] [2023-02-14 00:09:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-02-14 00:09:47,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:47,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083605259] [2023-02-14 00:09:47,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083605259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:09:47,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335274478] [2023-02-14 00:09:47,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 00:09:47,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:09:47,761 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) [2023-02-14 00:09:47,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 00:09:47,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 00:09:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:09:47,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 00:09:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:09:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-02-14 00:09:47,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:09:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-02-14 00:09:47,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335274478] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:09:47,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:09:47,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-14 00:09:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768862709] [2023-02-14 00:09:47,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:09:47,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 00:09:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 00:09:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 00:09:47,939 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:48,076 INFO L93 Difference]: Finished difference Result 479 states and 540 transitions. [2023-02-14 00:09:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 00:09:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-14 00:09:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:48,082 INFO L225 Difference]: With dead ends: 479 [2023-02-14 00:09:48,082 INFO L226 Difference]: Without dead ends: 434 [2023-02-14 00:09:48,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:09:48,084 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:48,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 81 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-14 00:09:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2023-02-14 00:09:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1213114754098361) internal successors, (342), 305 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 342 transitions. [2023-02-14 00:09:48,127 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 342 transitions. Word has length 47 [2023-02-14 00:09:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:48,128 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 342 transitions. [2023-02-14 00:09:48,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 342 transitions. [2023-02-14 00:09:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-02-14 00:09:48,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:48,140 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-14 00:09:48,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 00:09:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:48,345 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash -107592410, now seen corresponding path program 4 times [2023-02-14 00:09:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:48,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990385804] [2023-02-14 00:09:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4301 proven. 1 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2023-02-14 00:09:48,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:48,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990385804] [2023-02-14 00:09:48,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990385804] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:09:48,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863000675] [2023-02-14 00:09:48,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 00:09:48,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:48,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:09:48,498 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) [2023-02-14 00:09:48,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 00:09:48,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 00:09:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:09:48,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 00:09:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:09:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2023-02-14 00:09:48,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:09:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2023-02-14 00:09:48,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863000675] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:09:48,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:09:48,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-02-14 00:09:48,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140658269] [2023-02-14 00:09:48,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:09:48,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 00:09:48,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 00:09:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 00:09:48,705 INFO L87 Difference]: Start difference. First operand 306 states and 342 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:48,908 INFO L93 Difference]: Finished difference Result 2596 states and 2920 transitions. [2023-02-14 00:09:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 00:09:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2023-02-14 00:09:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:48,914 INFO L225 Difference]: With dead ends: 2596 [2023-02-14 00:09:48,914 INFO L226 Difference]: Without dead ends: 2294 [2023-02-14 00:09:48,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2023-02-14 00:09:48,916 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:48,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2023-02-14 00:09:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1542. [2023-02-14 00:09:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.0837118754055808) internal successors, (1670), 1541 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1670 transitions. [2023-02-14 00:09:49,013 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1670 transitions. Word has length 305 [2023-02-14 00:09:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:49,013 INFO L495 AbstractCegarLoop]: Abstraction has 1542 states and 1670 transitions. [2023-02-14 00:09:49,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1670 transitions. [2023-02-14 00:09:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1542 [2023-02-14 00:09:49,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:49,046 INFO L195 NwaCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-14 00:09:49,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 00:09:49,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:49,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1672164490, now seen corresponding path program 5 times [2023-02-14 00:09:49,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:49,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769401847] [2023-02-14 00:09:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:49,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:09:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 151174 proven. 1 refuted. 0 times theorem prover too weak. 251197 trivial. 0 not checked. [2023-02-14 00:09:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:09:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769401847] [2023-02-14 00:09:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769401847] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:09:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057234739] [2023-02-14 00:09:50,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 00:09:50,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:09:50,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:09:50,348 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) [2023-02-14 00:09:50,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 00:09:50,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2023-02-14 00:09:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:09:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 00:09:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:09:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2023-02-14 00:09:50,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:09:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2023-02-14 00:09:51,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057234739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:09:51,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:09:51,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-02-14 00:09:51,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103217713] [2023-02-14 00:09:51,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:09:51,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 00:09:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:09:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 00:09:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 00:09:51,078 INFO L87 Difference]: Start difference. First operand 1542 states and 1670 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:09:51,884 INFO L93 Difference]: Finished difference Result 15052 states and 16328 transitions. [2023-02-14 00:09:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 00:09:51,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1541 [2023-02-14 00:09:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:09:51,921 INFO L225 Difference]: With dead ends: 15052 [2023-02-14 00:09:51,921 INFO L226 Difference]: Without dead ends: 13514 [2023-02-14 00:09:51,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3096 GetRequests, 3076 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2023-02-14 00:09:51,926 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:09:51,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 104 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:09:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2023-02-14 00:09:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 9018. [2023-02-14 00:09:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 1.0777420428080293) internal successors, (9718), 9017 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 9718 transitions. [2023-02-14 00:09:52,388 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 9718 transitions. Word has length 1541 [2023-02-14 00:09:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:09:52,389 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 9718 transitions. [2023-02-14 00:09:52,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:09:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 9718 transitions. [2023-02-14 00:09:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9018 [2023-02-14 00:09:52,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:09:52,893 INFO L195 NwaCegarLoop]: trace histogram [3456, 3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-14 00:09:52,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 00:09:53,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 00:09:53,099 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:09:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:09:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1229783514, now seen corresponding path program 6 times [2023-02-14 00:09:53,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:09:53,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023441187] [2023-02-14 00:09:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:09:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:09:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:10:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172646 proven. 113309 refuted. 0 times theorem prover too weak. 11213119 trivial. 0 not checked. [2023-02-14 00:10:09,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:10:09,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023441187] [2023-02-14 00:10:09,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023441187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:10:09,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317737780] [2023-02-14 00:10:09,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 00:10:09,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:10:09,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:10:09,307 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) [2023-02-14 00:10:09,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 00:10:13,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 755 check-sat command(s) [2023-02-14 00:10:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:10:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 5125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 00:10:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:10:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2023-02-14 00:10:15,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:10:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2023-02-14 00:10:17,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317737780] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:10:17,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:10:17,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-14 00:10:17,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686384083] [2023-02-14 00:10:17,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:10:17,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 00:10:17,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:10:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 00:10:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-14 00:10:17,868 INFO L87 Difference]: Start difference. First operand 9018 states and 9718 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:10:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:10:19,008 INFO L93 Difference]: Finished difference Result 34861 states and 37582 transitions. [2023-02-14 00:10:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 00:10:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9017 [2023-02-14 00:10:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:10:19,071 INFO L225 Difference]: With dead ends: 34861 [2023-02-14 00:10:19,071 INFO L226 Difference]: Without dead ends: 26970 [2023-02-14 00:10:19,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18037 GetRequests, 18030 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-14 00:10:19,083 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:10:19,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:10:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26970 states. [2023-02-14 00:10:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26970 to 26970. [2023-02-14 00:10:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26970 states, 26969 states have (on average 1.07701434980904) internal successors, (29046), 26969 states have internal predecessors, (29046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:10:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26970 states to 26970 states and 29046 transitions. [2023-02-14 00:10:20,460 INFO L78 Accepts]: Start accepts. Automaton has 26970 states and 29046 transitions. Word has length 9017 [2023-02-14 00:10:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:10:20,462 INFO L495 AbstractCegarLoop]: Abstraction has 26970 states and 29046 transitions. [2023-02-14 00:10:20,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 00:10:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 26970 states and 29046 transitions. [2023-02-14 00:10:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26970 [2023-02-14 00:10:24,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:10:24,107 INFO L195 NwaCegarLoop]: trace histogram [10368, 10368, 1728, 1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-14 00:10:24,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 00:10:24,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:10:24,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:10:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:10:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2046182950, now seen corresponding path program 7 times [2023-02-14 00:10:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:10:24,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871673722] [2023-02-14 00:10:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:10:24,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:10:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat