./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/relax-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 04:25:40,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 04:25:40,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 04:25:40,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 04:25:40,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 04:25:40,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 04:25:40,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 04:25:40,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 04:25:40,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 04:25:40,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 04:25:40,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 04:25:40,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 04:25:40,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 04:25:40,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 04:25:40,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 04:25:40,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 04:25:40,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 04:25:40,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 04:25:40,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 04:25:40,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 04:25:40,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 04:25:40,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 04:25:40,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 04:25:40,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 04:25:40,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 04:25:40,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 04:25:40,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 04:25:40,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 04:25:40,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 04:25:40,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 04:25:40,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 04:25:40,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 04:25:40,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 04:25:40,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 04:25:40,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 04:25:40,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 04:25:40,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 04:25:40,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 04:25:40,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 04:25:40,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 04:25:40,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 04:25:40,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 04:25:40,980 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 04:25:40,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 04:25:40,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 04:25:40,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 04:25:40,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 04:25:40,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 04:25:40,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 04:25:40,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 04:25:40,982 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 04:25:40,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 04:25:40,983 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 04:25:40,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 04:25:40,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 04:25:40,984 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 04:25:40,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 04:25:40,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 04:25:40,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 04:25:40,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 04:25:40,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:25:40,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 04:25:40,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 04:25:40,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 04:25:40,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 04:25:40,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 04:25:40,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 04:25:40,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 04:25:40,987 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 04:25:40,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 04:25:40,987 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 04:25:40,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2023-02-17 04:25:41,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 04:25:41,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 04:25:41,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 04:25:41,170 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 04:25:41,170 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 04:25:41,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-17 04:25:42,299 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 04:25:42,528 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 04:25:42,528 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-17 04:25:42,538 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f3cfd100/a23545b4f4ac449bbbd05af45c14c496/FLAGfbd362287 [2023-02-17 04:25:42,551 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f3cfd100/a23545b4f4ac449bbbd05af45c14c496 [2023-02-17 04:25:42,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 04:25:42,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 04:25:42,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 04:25:42,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 04:25:42,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 04:25:42,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6bba87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42, skipping insertion in model container [2023-02-17 04:25:42,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 04:25:42,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 04:25:42,745 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/array-examples/relax-2-2.i[982,995] [2023-02-17 04:25:42,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:25:42,834 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 04:25:42,842 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/array-examples/relax-2-2.i[982,995] [2023-02-17 04:25:42,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:25:42,883 INFO L208 MainTranslator]: Completed translation [2023-02-17 04:25:42,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42 WrapperNode [2023-02-17 04:25:42,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 04:25:42,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 04:25:42,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 04:25:42,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 04:25:42,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,914 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2023-02-17 04:25:42,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 04:25:42,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 04:25:42,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 04:25:42,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 04:25:42,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,932 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 04:25:42,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 04:25:42,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 04:25:42,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 04:25:42,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (1/1) ... [2023-02-17 04:25:42,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:25:42,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:42,970 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) [2023-02-17 04:25:42,974 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 [2023-02-17 04:25:42,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 04:25:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 04:25:42,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 04:25:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 04:25:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 04:25:43,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 04:25:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 04:25:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 04:25:43,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 04:25:43,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 04:25:43,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 04:25:43,108 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 04:25:43,109 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 04:25:43,264 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 04:25:43,269 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 04:25:43,269 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-17 04:25:43,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:25:43 BoogieIcfgContainer [2023-02-17 04:25:43,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 04:25:43,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 04:25:43,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 04:25:43,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 04:25:43,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 04:25:42" (1/3) ... [2023-02-17 04:25:43,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad7559d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:25:43, skipping insertion in model container [2023-02-17 04:25:43,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:25:42" (2/3) ... [2023-02-17 04:25:43,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad7559d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:25:43, skipping insertion in model container [2023-02-17 04:25:43,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:25:43" (3/3) ... [2023-02-17 04:25:43,277 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-02-17 04:25:43,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 04:25:43,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 04:25:43,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 04:25:43,364 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;@2669b348, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 04:25:43,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 04:25:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 04:25:43,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:43,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:43,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:43,393 INFO L85 PathProgramCache]: Analyzing trace with hash 424197970, now seen corresponding path program 1 times [2023-02-17 04:25:43,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:43,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813576648] [2023-02-17 04:25:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:43,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:43,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:43,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813576648] [2023-02-17 04:25:43,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813576648] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:43,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:43,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 04:25:43,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557614228] [2023-02-17 04:25:43,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:43,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 04:25:43,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 04:25:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 04:25:43,639 INFO L87 Difference]: Start difference. First operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 04:25:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:43,658 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2023-02-17 04:25:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 04:25:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-17 04:25:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:43,666 INFO L225 Difference]: With dead ends: 105 [2023-02-17 04:25:43,667 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 04:25:43,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 04:25:43,671 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:43,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 04:25:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-17 04:25:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2023-02-17 04:25:43,698 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2023-02-17 04:25:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:43,710 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2023-02-17 04:25:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 04:25:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2023-02-17 04:25:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 04:25:43,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:43,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:43,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 04:25:43,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash 518459404, now seen corresponding path program 1 times [2023-02-17 04:25:43,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:43,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601786055] [2023-02-17 04:25:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:43,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:43,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:43,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601786055] [2023-02-17 04:25:43,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601786055] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:43,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:43,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 04:25:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220158325] [2023-02-17 04:25:43,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:43,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:25:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:25:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:25:43,908 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:43,934 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-02-17 04:25:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:25:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-17 04:25:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:43,936 INFO L225 Difference]: With dead ends: 83 [2023-02-17 04:25:43,936 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 04:25:43,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 04:25:43,938 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:43,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 04:25:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-02-17 04:25:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2023-02-17 04:25:43,949 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 24 [2023-02-17 04:25:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2023-02-17 04:25:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2023-02-17 04:25:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 04:25:43,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:43,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:43,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 04:25:43,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1090015461, now seen corresponding path program 1 times [2023-02-17 04:25:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:43,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88203603] [2023-02-17 04:25:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:44,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:44,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88203603] [2023-02-17 04:25:44,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88203603] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:44,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:44,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 04:25:44,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61467861] [2023-02-17 04:25:44,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:44,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 04:25:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 04:25:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 04:25:44,188 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:44,252 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-02-17 04:25:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 04:25:44,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-02-17 04:25:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:44,254 INFO L225 Difference]: With dead ends: 108 [2023-02-17 04:25:44,254 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 04:25:44,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 04:25:44,255 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:44,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 04:25:44,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-02-17 04:25:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2023-02-17 04:25:44,262 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2023-02-17 04:25:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:44,262 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2023-02-17 04:25:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2023-02-17 04:25:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 04:25:44,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:44,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:44,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 04:25:44,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1637522002, now seen corresponding path program 1 times [2023-02-17 04:25:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445277644] [2023-02-17 04:25:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:44,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:44,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:44,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445277644] [2023-02-17 04:25:44,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445277644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:44,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:44,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 04:25:44,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095737320] [2023-02-17 04:25:44,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:44,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 04:25:44,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 04:25:44,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 04:25:44,478 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:44,678 INFO L93 Difference]: Finished difference Result 110 states and 147 transitions. [2023-02-17 04:25:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 04:25:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-02-17 04:25:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:44,684 INFO L225 Difference]: With dead ends: 110 [2023-02-17 04:25:44,685 INFO L226 Difference]: Without dead ends: 98 [2023-02-17 04:25:44,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 04:25:44,694 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:44,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 333 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:25:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-17 04:25:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2023-02-17 04:25:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 67 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2023-02-17 04:25:44,714 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 27 [2023-02-17 04:25:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:44,714 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2023-02-17 04:25:44,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2023-02-17 04:25:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 04:25:44,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:44,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:44,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 04:25:44,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -703814141, now seen corresponding path program 1 times [2023-02-17 04:25:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808716679] [2023-02-17 04:25:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808716679] [2023-02-17 04:25:45,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808716679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117577476] [2023-02-17 04:25:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:45,030 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) [2023-02-17 04:25:45,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 04:25:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 04:25:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:45,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 04:25:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117577476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:45,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 04:25:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-02-17 04:25:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893640038] [2023-02-17 04:25:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:45,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 04:25:45,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 04:25:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-17 04:25:45,326 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:45,409 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2023-02-17 04:25:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 04:25:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-02-17 04:25:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:45,411 INFO L225 Difference]: With dead ends: 88 [2023-02-17 04:25:45,411 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 04:25:45,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-17 04:25:45,412 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:45,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 186 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:25:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 04:25:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-02-17 04:25:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.391304347826087) internal successors, (96), 70 states have internal predecessors, (96), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2023-02-17 04:25:45,433 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 28 [2023-02-17 04:25:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:45,433 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2023-02-17 04:25:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2023-02-17 04:25:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 04:25:45,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:45,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:45,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 04:25:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:45,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 338610741, now seen corresponding path program 1 times [2023-02-17 04:25:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623385926] [2023-02-17 04:25:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:45,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:45,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623385926] [2023-02-17 04:25:45,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623385926] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:45,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:45,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 04:25:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444259057] [2023-02-17 04:25:45,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:45,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:25:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:25:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:25:45,741 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:45,762 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2023-02-17 04:25:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:25:45,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-17 04:25:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:45,763 INFO L225 Difference]: With dead ends: 97 [2023-02-17 04:25:45,763 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 04:25:45,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 04:25:45,764 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:45,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 04:25:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-02-17 04:25:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2023-02-17 04:25:45,780 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 29 [2023-02-17 04:25:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:45,780 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2023-02-17 04:25:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2023-02-17 04:25:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 04:25:45,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:45,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:45,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 04:25:45,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1088390000, now seen corresponding path program 1 times [2023-02-17 04:25:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:45,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934262866] [2023-02-17 04:25:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:45,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:45,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934262866] [2023-02-17 04:25:45,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934262866] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:45,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:45,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 04:25:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406008122] [2023-02-17 04:25:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:45,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 04:25:45,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 04:25:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 04:25:45,958 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:46,057 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2023-02-17 04:25:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 04:25:46,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-17 04:25:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:46,058 INFO L225 Difference]: With dead ends: 90 [2023-02-17 04:25:46,058 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 04:25:46,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-17 04:25:46,059 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:46,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 216 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:25:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 04:25:46,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-17 04:25:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-02-17 04:25:46,078 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2023-02-17 04:25:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:46,078 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-17 04:25:46,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-02-17 04:25:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 04:25:46,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:46,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:46,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 04:25:46,079 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1413511858, now seen corresponding path program 1 times [2023-02-17 04:25:46,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:46,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308854728] [2023-02-17 04:25:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:46,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:25:46,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308854728] [2023-02-17 04:25:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308854728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884545008] [2023-02-17 04:25:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:46,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:46,371 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) [2023-02-17 04:25:46,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 04:25:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 04:25:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:46,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 04:25:46,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884545008] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:46,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 04:25:46,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-17 04:25:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364636751] [2023-02-17 04:25:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:46,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:25:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:46,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:25:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 04:25:46,493 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:46,543 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-02-17 04:25:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:25:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-17 04:25:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:46,544 INFO L225 Difference]: With dead ends: 71 [2023-02-17 04:25:46,544 INFO L226 Difference]: Without dead ends: 57 [2023-02-17 04:25:46,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 04:25:46,545 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:46,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-17 04:25:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-17 04:25:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-02-17 04:25:46,549 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 29 [2023-02-17 04:25:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:46,550 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-02-17 04:25:46,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-02-17 04:25:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 04:25:46,550 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:46,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:46,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 04:25:46,755 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 [2023-02-17 04:25:46,756 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1264785641, now seen corresponding path program 1 times [2023-02-17 04:25:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257125494] [2023-02-17 04:25:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257125494] [2023-02-17 04:25:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257125494] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:46,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:46,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:25:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737040462] [2023-02-17 04:25:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 04:25:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 04:25:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:25:46,789 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:46,802 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2023-02-17 04:25:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 04:25:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-02-17 04:25:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:46,803 INFO L225 Difference]: With dead ends: 93 [2023-02-17 04:25:46,803 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 04:25:46,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:25:46,804 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:46,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 04:25:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2023-02-17 04:25:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2023-02-17 04:25:46,809 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 31 [2023-02-17 04:25:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:46,809 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2023-02-17 04:25:46,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2023-02-17 04:25:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 04:25:46,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:46,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:46,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 04:25:46,811 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1196949427, now seen corresponding path program 1 times [2023-02-17 04:25:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:46,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57972248] [2023-02-17 04:25:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:46,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:46,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57972248] [2023-02-17 04:25:46,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57972248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:46,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622286450] [2023-02-17 04:25:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:46,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:46,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:46,935 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) [2023-02-17 04:25:46,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 04:25:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 04:25:46,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:47,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 04:25:47,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622286450] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:47,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 04:25:47,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2023-02-17 04:25:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242747797] [2023-02-17 04:25:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:47,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 04:25:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 04:25:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 04:25:47,021 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:47,085 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2023-02-17 04:25:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 04:25:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-02-17 04:25:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:47,086 INFO L225 Difference]: With dead ends: 124 [2023-02-17 04:25:47,086 INFO L226 Difference]: Without dead ends: 64 [2023-02-17 04:25:47,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:25:47,087 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 38 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:47,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 221 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-17 04:25:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-17 04:25:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 04:25:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-02-17 04:25:47,091 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2023-02-17 04:25:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:47,091 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-02-17 04:25:47,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-02-17 04:25:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 04:25:47,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:47,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:47,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 04:25:47,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:47,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666735, now seen corresponding path program 1 times [2023-02-17 04:25:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:47,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234766010] [2023-02-17 04:25:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:47,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:47,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234766010] [2023-02-17 04:25:47,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234766010] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:47,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161749519] [2023-02-17 04:25:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:47,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:47,388 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) [2023-02-17 04:25:47,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 04:25:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:47,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 04:25:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:47,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:25:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:47,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161749519] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:25:47,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:25:47,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2023-02-17 04:25:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833318535] [2023-02-17 04:25:47,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:25:47,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 04:25:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 04:25:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-17 04:25:47,552 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:47,699 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2023-02-17 04:25:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 04:25:47,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-17 04:25:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:47,700 INFO L225 Difference]: With dead ends: 148 [2023-02-17 04:25:47,700 INFO L226 Difference]: Without dead ends: 125 [2023-02-17 04:25:47,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-02-17 04:25:47,701 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:47,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 684 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:25:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-17 04:25:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2023-02-17 04:25:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2023-02-17 04:25:47,707 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 37 [2023-02-17 04:25:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:47,708 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2023-02-17 04:25:47,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2023-02-17 04:25:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 04:25:47,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:47,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:47,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 04:25:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:47,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1165513777, now seen corresponding path program 1 times [2023-02-17 04:25:47,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:47,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797418402] [2023-02-17 04:25:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:48,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797418402] [2023-02-17 04:25:48,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797418402] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723783523] [2023-02-17 04:25:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:48,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:48,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:48,063 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) [2023-02-17 04:25:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 04:25:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 04:25:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 04:25:48,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 04:25:48,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723783523] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:48,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 04:25:48,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-02-17 04:25:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158177157] [2023-02-17 04:25:48,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:25:48,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:25:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:25:48,150 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:48,200 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2023-02-17 04:25:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:25:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-17 04:25:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:48,201 INFO L225 Difference]: With dead ends: 127 [2023-02-17 04:25:48,201 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 04:25:48,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-17 04:25:48,202 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:48,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 04:25:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2023-02-17 04:25:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 88 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2023-02-17 04:25:48,207 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 37 [2023-02-17 04:25:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:48,207 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2023-02-17 04:25:48,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2023-02-17 04:25:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 04:25:48,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:48,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:48,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 04:25:48,408 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,SelfDestructingSolverStorable11 [2023-02-17 04:25:48,409 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2034579695, now seen corresponding path program 1 times [2023-02-17 04:25:48,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:48,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972602894] [2023-02-17 04:25:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:48,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 04:25:48,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:48,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972602894] [2023-02-17 04:25:48,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972602894] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:48,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166174798] [2023-02-17 04:25:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:48,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:48,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:48,657 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) [2023-02-17 04:25:48,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 04:25:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:48,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 04:25:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:48,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:25:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:48,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166174798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:25:48,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:25:48,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-02-17 04:25:48,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532429027] [2023-02-17 04:25:48,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:25:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 04:25:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:48,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 04:25:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-17 04:25:48,821 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:49,309 INFO L93 Difference]: Finished difference Result 273 states and 368 transitions. [2023-02-17 04:25:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 04:25:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-02-17 04:25:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:49,311 INFO L225 Difference]: With dead ends: 273 [2023-02-17 04:25:49,311 INFO L226 Difference]: Without dead ends: 223 [2023-02-17 04:25:49,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 04:25:49,312 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 695 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:49,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 735 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:25:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-17 04:25:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 110. [2023-02-17 04:25:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 99 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2023-02-17 04:25:49,320 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 38 [2023-02-17 04:25:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:49,321 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2023-02-17 04:25:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2023-02-17 04:25:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 04:25:49,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:49,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:49,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 04:25:49,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:49,529 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:49,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922323, now seen corresponding path program 1 times [2023-02-17 04:25:49,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:49,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511269419] [2023-02-17 04:25:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 04:25:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:25:49,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511269419] [2023-02-17 04:25:49,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511269419] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:49,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:25:49,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 04:25:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399736593] [2023-02-17 04:25:49,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:49,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:25:49,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:49,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:25:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:25:49,595 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:25:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:49,646 INFO L93 Difference]: Finished difference Result 140 states and 180 transitions. [2023-02-17 04:25:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:25:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-02-17 04:25:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:49,647 INFO L225 Difference]: With dead ends: 140 [2023-02-17 04:25:49,647 INFO L226 Difference]: Without dead ends: 119 [2023-02-17 04:25:49,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:25:49,648 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:49,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-17 04:25:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-02-17 04:25:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.297029702970297) internal successors, (131), 102 states have internal predecessors, (131), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2023-02-17 04:25:49,656 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 42 [2023-02-17 04:25:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:49,656 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2023-02-17 04:25:49,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:25:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2023-02-17 04:25:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 04:25:49,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:49,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:49,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 04:25:49,658 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash -587856589, now seen corresponding path program 2 times [2023-02-17 04:25:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:49,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321956350] [2023-02-17 04:25:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:49,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 04:25:49,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:49,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321956350] [2023-02-17 04:25:49,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321956350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:49,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989660913] [2023-02-17 04:25:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:25:49,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:49,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:49,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:25:49,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 04:25:49,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:25:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:25:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 04:25:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 04:25:49,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 04:25:49,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989660913] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:25:49,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 04:25:49,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-17 04:25:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915254465] [2023-02-17 04:25:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:25:49,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 04:25:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 04:25:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 04:25:49,904 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:49,959 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2023-02-17 04:25:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 04:25:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-02-17 04:25:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:49,960 INFO L225 Difference]: With dead ends: 129 [2023-02-17 04:25:49,960 INFO L226 Difference]: Without dead ends: 121 [2023-02-17 04:25:49,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:25:49,960 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:49,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 174 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:25:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-17 04:25:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2023-02-17 04:25:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.303030303030303) internal successors, (129), 100 states have internal predecessors, (129), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2023-02-17 04:25:49,968 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 41 [2023-02-17 04:25:49,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:49,968 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2023-02-17 04:25:49,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2023-02-17 04:25:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 04:25:49,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:49,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:49,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 04:25:50,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:50,174 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:50,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:50,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1093284825, now seen corresponding path program 1 times [2023-02-17 04:25:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:50,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350866463] [2023-02-17 04:25:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:50,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:50,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:50,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 04:25:50,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:50,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350866463] [2023-02-17 04:25:50,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350866463] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044998552] [2023-02-17 04:25:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:50,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:50,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:50,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:25:50,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 04:25:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 04:25:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:25:50,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:25:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 04:25:50,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044998552] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:25:50,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:25:50,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2023-02-17 04:25:50,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773740324] [2023-02-17 04:25:50,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:25:50,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 04:25:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:25:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 04:25:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-17 04:25:50,457 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:25:51,081 INFO L93 Difference]: Finished difference Result 329 states and 461 transitions. [2023-02-17 04:25:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 04:25:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-17 04:25:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:25:51,083 INFO L225 Difference]: With dead ends: 329 [2023-02-17 04:25:51,083 INFO L226 Difference]: Without dead ends: 303 [2023-02-17 04:25:51,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 04:25:51,084 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 328 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:25:51,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1293 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 04:25:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-02-17 04:25:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 141. [2023-02-17 04:25:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.3410852713178294) internal successors, (173), 130 states have internal predecessors, (173), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:25:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 188 transitions. [2023-02-17 04:25:51,096 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 188 transitions. Word has length 42 [2023-02-17 04:25:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:25:51,097 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 188 transitions. [2023-02-17 04:25:51,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:25:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 188 transitions. [2023-02-17 04:25:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 04:25:51,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:25:51,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:25:51,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 04:25:51,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 04:25:51,302 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:25:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:25:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1902631451, now seen corresponding path program 1 times [2023-02-17 04:25:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:25:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563958191] [2023-02-17 04:25:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:51,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:25:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:25:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:51,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:25:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 04:25:51,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:25:51,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563958191] [2023-02-17 04:25:51,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563958191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:25:51,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573940485] [2023-02-17 04:25:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:25:51,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:25:51,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:25:51,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:25:51,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 04:25:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:25:51,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 04:25:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:25:51,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:25:51,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:25:51,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 336 treesize of output 490 [2023-02-17 04:26:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:26:05,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 04:26:06,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573940485] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:06,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 04:26:06,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 17] total 31 [2023-02-17 04:26:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629293369] [2023-02-17 04:26:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:26:06,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 04:26:06,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:06,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 04:26:06,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-02-17 04:26:06,074 INFO L87 Difference]: Start difference. First operand 141 states and 188 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:06,778 INFO L93 Difference]: Finished difference Result 286 states and 389 transitions. [2023-02-17 04:26:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 04:26:06,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-17 04:26:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:06,779 INFO L225 Difference]: With dead ends: 286 [2023-02-17 04:26:06,779 INFO L226 Difference]: Without dead ends: 277 [2023-02-17 04:26:06,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 04:26:06,780 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 162 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:06,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 615 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:26:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-02-17 04:26:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 177. [2023-02-17 04:26:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.3696969696969696) internal successors, (226), 166 states have internal predecessors, (226), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2023-02-17 04:26:06,806 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 42 [2023-02-17 04:26:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:06,807 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2023-02-17 04:26:06,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2023-02-17 04:26:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 04:26:06,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:06,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:06,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 04:26:07,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 04:26:07,012 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash -723035797, now seen corresponding path program 2 times [2023-02-17 04:26:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:07,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69270901] [2023-02-17 04:26:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:07,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:07,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 04:26:07,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:07,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69270901] [2023-02-17 04:26:07,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69270901] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:07,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391906181] [2023-02-17 04:26:07,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:26:07,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:07,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:07,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 04:26:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 04:26:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 04:26:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:07,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391906181] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:07,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 04:26:07,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 6] total 21 [2023-02-17 04:26:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171884128] [2023-02-17 04:26:07,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:26:07,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 04:26:07,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 04:26:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-02-17 04:26:07,489 INFO L87 Difference]: Start difference. First operand 177 states and 241 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:07,633 INFO L93 Difference]: Finished difference Result 213 states and 283 transitions. [2023-02-17 04:26:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 04:26:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-17 04:26:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:07,634 INFO L225 Difference]: With dead ends: 213 [2023-02-17 04:26:07,634 INFO L226 Difference]: Without dead ends: 205 [2023-02-17 04:26:07,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-02-17 04:26:07,635 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 97 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:07,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 340 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:26:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-17 04:26:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2023-02-17 04:26:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 139 states have internal predecessors, (186), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2023-02-17 04:26:07,652 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 42 [2023-02-17 04:26:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:07,652 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2023-02-17 04:26:07,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2023-02-17 04:26:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 04:26:07,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:07,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:07,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 04:26:07,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1237186607, now seen corresponding path program 1 times [2023-02-17 04:26:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:07,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34470661] [2023-02-17 04:26:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:07,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:07,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:07,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 04:26:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34470661] [2023-02-17 04:26:07,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34470661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889491024] [2023-02-17 04:26:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:07,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:07,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:07,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:08,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 04:26:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 04:26:08,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 04:26:08,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 04:26:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889491024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:08,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-17 04:26:08,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398632563] [2023-02-17 04:26:08,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:08,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 04:26:08,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 04:26:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-17 04:26:08,207 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:08,676 INFO L93 Difference]: Finished difference Result 550 states and 766 transitions. [2023-02-17 04:26:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 04:26:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-17 04:26:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:08,678 INFO L225 Difference]: With dead ends: 550 [2023-02-17 04:26:08,678 INFO L226 Difference]: Without dead ends: 522 [2023-02-17 04:26:08,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:26:08,679 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 630 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:08,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 880 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:26:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-02-17 04:26:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 177. [2023-02-17 04:26:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 164 states have (on average 1.3719512195121952) internal successors, (225), 165 states have internal predecessors, (225), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:26:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 242 transitions. [2023-02-17 04:26:08,702 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 242 transitions. Word has length 43 [2023-02-17 04:26:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:08,702 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 242 transitions. [2023-02-17 04:26:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 242 transitions. [2023-02-17 04:26:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 04:26:08,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:08,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:08,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:08,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:08,908 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:08,909 INFO L85 PathProgramCache]: Analyzing trace with hash -623650351, now seen corresponding path program 1 times [2023-02-17 04:26:08,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:08,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539895125] [2023-02-17 04:26:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:08,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:09,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 04:26:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539895125] [2023-02-17 04:26:09,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539895125] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362003433] [2023-02-17 04:26:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:09,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:09,056 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:09,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 04:26:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:09,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 04:26:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:26:09,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 04:26:09,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362003433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:09,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:09,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 20 [2023-02-17 04:26:09,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494649835] [2023-02-17 04:26:09,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:09,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 04:26:09,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 04:26:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-02-17 04:26:09,256 INFO L87 Difference]: Start difference. First operand 177 states and 242 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:09,572 INFO L93 Difference]: Finished difference Result 329 states and 438 transitions. [2023-02-17 04:26:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 04:26:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-17 04:26:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:09,573 INFO L225 Difference]: With dead ends: 329 [2023-02-17 04:26:09,574 INFO L226 Difference]: Without dead ends: 250 [2023-02-17 04:26:09,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-02-17 04:26:09,575 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 367 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:09,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 925 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:26:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-17 04:26:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 168. [2023-02-17 04:26:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 155 states have (on average 1.335483870967742) internal successors, (207), 156 states have internal predecessors, (207), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:26:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 224 transitions. [2023-02-17 04:26:09,599 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 224 transitions. Word has length 45 [2023-02-17 04:26:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 224 transitions. [2023-02-17 04:26:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 224 transitions. [2023-02-17 04:26:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 04:26:09,600 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:09,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:09,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-17 04:26:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:09,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1015993583, now seen corresponding path program 2 times [2023-02-17 04:26:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:09,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657718849] [2023-02-17 04:26:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:10,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:10,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 04:26:10,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657718849] [2023-02-17 04:26:10,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657718849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393439140] [2023-02-17 04:26:10,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:26:10,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:10,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:10,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:10,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 04:26:10,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:26:10,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 04:26:10,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:26:10,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:26:10,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393439140] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:10,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:10,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2023-02-17 04:26:10,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177246723] [2023-02-17 04:26:10,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:10,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 04:26:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 04:26:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-02-17 04:26:10,287 INFO L87 Difference]: Start difference. First operand 168 states and 224 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:12,332 INFO L93 Difference]: Finished difference Result 743 states and 1027 transitions. [2023-02-17 04:26:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-17 04:26:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-17 04:26:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:12,335 INFO L225 Difference]: With dead ends: 743 [2023-02-17 04:26:12,335 INFO L226 Difference]: Without dead ends: 714 [2023-02-17 04:26:12,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1270, Invalid=7102, Unknown=0, NotChecked=0, Total=8372 [2023-02-17 04:26:12,338 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1608 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:12,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 1840 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 04:26:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-02-17 04:26:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 182. [2023-02-17 04:26:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 169 states have (on average 1.331360946745562) internal successors, (225), 170 states have internal predecessors, (225), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:26:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 242 transitions. [2023-02-17 04:26:12,385 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 242 transitions. Word has length 45 [2023-02-17 04:26:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:12,386 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 242 transitions. [2023-02-17 04:26:12,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 242 transitions. [2023-02-17 04:26:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 04:26:12,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:12,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:12,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:12,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-17 04:26:12,594 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1957197463, now seen corresponding path program 1 times [2023-02-17 04:26:12,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:12,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058982170] [2023-02-17 04:26:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:13,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 04:26:13,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:13,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058982170] [2023-02-17 04:26:13,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058982170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488201724] [2023-02-17 04:26:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:13,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:13,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:13,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:13,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 04:26:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-17 04:26:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:13,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:26:13,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:13,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:13,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:26:13,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 51 [2023-02-17 04:26:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:26:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:26:13,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488201724] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:13,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:13,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 32 [2023-02-17 04:26:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540327707] [2023-02-17 04:26:13,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:13,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 04:26:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 04:26:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-02-17 04:26:13,887 INFO L87 Difference]: Start difference. First operand 182 states and 242 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:15,854 INFO L93 Difference]: Finished difference Result 676 states and 919 transitions. [2023-02-17 04:26:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 04:26:15,854 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-17 04:26:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:15,859 INFO L225 Difference]: With dead ends: 676 [2023-02-17 04:26:15,860 INFO L226 Difference]: Without dead ends: 582 [2023-02-17 04:26:15,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2023-02-17 04:26:15,861 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 552 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:15,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1555 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 04:26:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-17 04:26:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 192. [2023-02-17 04:26:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 179 states have (on average 1.324022346368715) internal successors, (237), 180 states have internal predecessors, (237), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:26:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 254 transitions. [2023-02-17 04:26:15,901 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 254 transitions. Word has length 48 [2023-02-17 04:26:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:15,901 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 254 transitions. [2023-02-17 04:26:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 254 transitions. [2023-02-17 04:26:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 04:26:15,902 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:15,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:15,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 04:26:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:16,107 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1256132885, now seen corresponding path program 1 times [2023-02-17 04:26:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:16,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703546851] [2023-02-17 04:26:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:16,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:16,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 04:26:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703546851] [2023-02-17 04:26:16,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703546851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830718239] [2023-02-17 04:26:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:16,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:16,527 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:16,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 04:26:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:16,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-17 04:26:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:16,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:26:16,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:16,809 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:16,810 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:16,810 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:16,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:26:16,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 331 treesize of output 264 [2023-02-17 04:26:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 04:26:16,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 04:26:16,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830718239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:16,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:16,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2023-02-17 04:26:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451120101] [2023-02-17 04:26:16,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 04:26:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:16,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 04:26:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2023-02-17 04:26:16,998 INFO L87 Difference]: Start difference. First operand 192 states and 254 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:17,597 INFO L93 Difference]: Finished difference Result 394 states and 527 transitions. [2023-02-17 04:26:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 04:26:17,598 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-17 04:26:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:17,599 INFO L225 Difference]: With dead ends: 394 [2023-02-17 04:26:17,599 INFO L226 Difference]: Without dead ends: 300 [2023-02-17 04:26:17,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 04:26:17,600 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 282 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:17,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 918 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 04:26:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-02-17 04:26:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2023-02-17 04:26:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 170 states have (on average 1.3) internal successors, (221), 171 states have internal predecessors, (221), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:26:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 238 transitions. [2023-02-17 04:26:17,642 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 238 transitions. Word has length 48 [2023-02-17 04:26:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:17,642 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 238 transitions. [2023-02-17 04:26:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 238 transitions. [2023-02-17 04:26:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 04:26:17,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:17,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:17,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:17,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:17,852 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1172902444, now seen corresponding path program 1 times [2023-02-17 04:26:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753521452] [2023-02-17 04:26:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:17,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:17,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 04:26:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:17,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 04:26:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 04:26:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753521452] [2023-02-17 04:26:17,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753521452] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003863414] [2023-02-17 04:26:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:17,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:17,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:17,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:17,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 04:26:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:17,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 04:26:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:18,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:18,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003863414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:18,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:18,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-17 04:26:18,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115591918] [2023-02-17 04:26:18,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 04:26:18,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 04:26:18,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-02-17 04:26:18,070 INFO L87 Difference]: Start difference. First operand 183 states and 238 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 04:26:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:18,298 INFO L93 Difference]: Finished difference Result 232 states and 300 transitions. [2023-02-17 04:26:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 04:26:18,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2023-02-17 04:26:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:18,300 INFO L225 Difference]: With dead ends: 232 [2023-02-17 04:26:18,300 INFO L226 Difference]: Without dead ends: 182 [2023-02-17 04:26:18,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-02-17 04:26:18,301 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 83 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 498 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:26:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-17 04:26:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 171. [2023-02-17 04:26:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 158 states have (on average 1.3037974683544304) internal successors, (206), 159 states have internal predecessors, (206), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:26:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2023-02-17 04:26:18,345 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 51 [2023-02-17 04:26:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:18,346 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2023-02-17 04:26:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 04:26:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2023-02-17 04:26:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 04:26:18,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:18,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:18,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-17 04:26:18,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-17 04:26:18,552 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash 837736387, now seen corresponding path program 2 times [2023-02-17 04:26:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559534538] [2023-02-17 04:26:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:18,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:18,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 04:26:18,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559534538] [2023-02-17 04:26:18,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559534538] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:18,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429633289] [2023-02-17 04:26:18,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:26:18,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:18,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:18,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:18,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 04:26:18,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:26:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-17 04:26:18,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:18,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:26:18,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:26:18,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 136 [2023-02-17 04:26:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:26:18,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:26:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429633289] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:19,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:19,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 14] total 36 [2023-02-17 04:26:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739979842] [2023-02-17 04:26:19,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:19,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 04:26:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 04:26:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 04:26:19,215 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 36 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 35 states have internal predecessors, (106), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:26:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:22,909 INFO L93 Difference]: Finished difference Result 1103 states and 1504 transitions. [2023-02-17 04:26:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-17 04:26:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 35 states have internal predecessors, (106), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-17 04:26:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:22,913 INFO L225 Difference]: With dead ends: 1103 [2023-02-17 04:26:22,913 INFO L226 Difference]: Without dead ends: 887 [2023-02-17 04:26:22,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=926, Invalid=6046, Unknown=0, NotChecked=0, Total=6972 [2023-02-17 04:26:22,915 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1232 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 3588 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:22,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 3380 Invalid, 3847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3588 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-17 04:26:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-02-17 04:26:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 280. [2023-02-17 04:26:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 266 states have (on average 1.3045112781954886) internal successors, (347), 267 states have internal predecessors, (347), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 04:26:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 366 transitions. [2023-02-17 04:26:22,990 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 366 transitions. Word has length 50 [2023-02-17 04:26:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:22,991 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 366 transitions. [2023-02-17 04:26:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 35 states have internal predecessors, (106), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:26:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 366 transitions. [2023-02-17 04:26:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 04:26:22,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:22,992 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:22,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:23,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:23,197 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:23,197 INFO L85 PathProgramCache]: Analyzing trace with hash -319274875, now seen corresponding path program 1 times [2023-02-17 04:26:23,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:23,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447083166] [2023-02-17 04:26:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:23,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:23,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:23,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447083166] [2023-02-17 04:26:23,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447083166] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173513599] [2023-02-17 04:26:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:23,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:23,420 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 04:26:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:23,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 04:26:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:23,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:23,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173513599] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:23,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:23,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-02-17 04:26:23,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345672117] [2023-02-17 04:26:23,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:23,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 04:26:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 04:26:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-02-17 04:26:23,761 INFO L87 Difference]: Start difference. First operand 280 states and 366 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:24,275 INFO L93 Difference]: Finished difference Result 443 states and 581 transitions. [2023-02-17 04:26:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 04:26:24,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-17 04:26:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:24,277 INFO L225 Difference]: With dead ends: 443 [2023-02-17 04:26:24,277 INFO L226 Difference]: Without dead ends: 348 [2023-02-17 04:26:24,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-02-17 04:26:24,278 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 513 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:24,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 880 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:26:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-02-17 04:26:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 238. [2023-02-17 04:26:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 224 states have (on average 1.2901785714285714) internal successors, (289), 225 states have internal predecessors, (289), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 04:26:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 308 transitions. [2023-02-17 04:26:24,358 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 308 transitions. Word has length 51 [2023-02-17 04:26:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:24,359 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 308 transitions. [2023-02-17 04:26:24,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 308 transitions. [2023-02-17 04:26:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 04:26:24,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:24,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:24,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:24,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:24,564 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1642339760, now seen corresponding path program 1 times [2023-02-17 04:26:24,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729067104] [2023-02-17 04:26:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:24,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:24,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:24,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:24,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 04:26:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:24,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-17 04:26:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:26:24,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:24,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729067104] [2023-02-17 04:26:24,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729067104] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282171695] [2023-02-17 04:26:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:24,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:24,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:24,701 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:24,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 04:26:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 04:26:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:24,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:26:24,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282171695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:24,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:24,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2023-02-17 04:26:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879662641] [2023-02-17 04:26:24,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 04:26:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 04:26:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-17 04:26:24,907 INFO L87 Difference]: Start difference. First operand 238 states and 308 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 04:26:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:25,192 INFO L93 Difference]: Finished difference Result 325 states and 418 transitions. [2023-02-17 04:26:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 04:26:25,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2023-02-17 04:26:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:25,193 INFO L225 Difference]: With dead ends: 325 [2023-02-17 04:26:25,193 INFO L226 Difference]: Without dead ends: 258 [2023-02-17 04:26:25,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-02-17 04:26:25,194 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 91 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:25,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 548 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:26:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-17 04:26:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2023-02-17 04:26:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.278301886792453) internal successors, (271), 213 states have internal predecessors, (271), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 286 transitions. [2023-02-17 04:26:25,246 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 286 transitions. Word has length 54 [2023-02-17 04:26:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:25,247 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 286 transitions. [2023-02-17 04:26:25,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 04:26:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 286 transitions. [2023-02-17 04:26:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 04:26:25,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:25,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:25,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 04:26:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:25,453 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash -696956633, now seen corresponding path program 2 times [2023-02-17 04:26:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48611401] [2023-02-17 04:26:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:25,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 04:26:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:25,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48611401] [2023-02-17 04:26:25,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48611401] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:25,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106861291] [2023-02-17 04:26:25,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:26:25,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:25,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 04:26:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:26:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 04:26:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 04:26:25,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 04:26:25,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106861291] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:25,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:25,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2023-02-17 04:26:25,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696002208] [2023-02-17 04:26:25,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:25,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 04:26:25,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 04:26:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-17 04:26:25,890 INFO L87 Difference]: Start difference. First operand 224 states and 286 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:27,047 INFO L93 Difference]: Finished difference Result 1099 states and 1434 transitions. [2023-02-17 04:26:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 04:26:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-02-17 04:26:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:27,055 INFO L225 Difference]: With dead ends: 1099 [2023-02-17 04:26:27,055 INFO L226 Difference]: Without dead ends: 1047 [2023-02-17 04:26:27,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1498, Unknown=0, NotChecked=0, Total=1892 [2023-02-17 04:26:27,057 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1306 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:27,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 1408 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 04:26:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-17 04:26:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 265. [2023-02-17 04:26:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 253 states have (on average 1.2885375494071147) internal successors, (326), 254 states have internal predecessors, (326), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 341 transitions. [2023-02-17 04:26:27,169 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 341 transitions. Word has length 53 [2023-02-17 04:26:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:27,170 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 341 transitions. [2023-02-17 04:26:27,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 341 transitions. [2023-02-17 04:26:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 04:26:27,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:27,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:27,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:27,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 04:26:27,375 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1927093159, now seen corresponding path program 2 times [2023-02-17 04:26:27,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:27,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644606153] [2023-02-17 04:26:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:27,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:27,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:27,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 04:26:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644606153] [2023-02-17 04:26:27,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644606153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369867124] [2023-02-17 04:26:27,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:26:27,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:27,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:27,494 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:27,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 04:26:27,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:26:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 04:26:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 04:26:27,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 04:26:27,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369867124] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:27,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:27,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-02-17 04:26:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138469931] [2023-02-17 04:26:27,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:27,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 04:26:27,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 04:26:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-02-17 04:26:27,709 INFO L87 Difference]: Start difference. First operand 265 states and 341 transitions. Second operand has 21 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:28,144 INFO L93 Difference]: Finished difference Result 337 states and 435 transitions. [2023-02-17 04:26:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 04:26:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-17 04:26:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:28,146 INFO L225 Difference]: With dead ends: 337 [2023-02-17 04:26:28,146 INFO L226 Difference]: Without dead ends: 287 [2023-02-17 04:26:28,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-02-17 04:26:28,150 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 40 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:28,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1205 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:26:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-02-17 04:26:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 276. [2023-02-17 04:26:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 264 states have (on average 1.2916666666666667) internal successors, (341), 265 states have internal predecessors, (341), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 356 transitions. [2023-02-17 04:26:28,237 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 356 transitions. Word has length 54 [2023-02-17 04:26:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:28,239 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 356 transitions. [2023-02-17 04:26:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 356 transitions. [2023-02-17 04:26:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 04:26:28,240 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:28,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:28,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-17 04:26:28,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 04:26:28,445 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:28,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1251752277, now seen corresponding path program 3 times [2023-02-17 04:26:28,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:28,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240372253] [2023-02-17 04:26:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:28,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:28,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 04:26:28,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:28,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240372253] [2023-02-17 04:26:28,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240372253] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:28,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445088021] [2023-02-17 04:26:28,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:26:28,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:28,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:28,652 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:28,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 04:26:28,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 04:26:28,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:28,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 04:26:28,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:26:29,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 04:26:29,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445088021] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:29,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:29,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 48 [2023-02-17 04:26:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396967808] [2023-02-17 04:26:29,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:29,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-17 04:26:29,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-17 04:26:29,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2074, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 04:26:29,702 INFO L87 Difference]: Start difference. First operand 276 states and 356 transitions. Second operand has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 46 states have internal predecessors, (106), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:26:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:35,291 INFO L93 Difference]: Finished difference Result 887 states and 1160 transitions. [2023-02-17 04:26:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-17 04:26:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 46 states have internal predecessors, (106), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-17 04:26:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:35,296 INFO L225 Difference]: With dead ends: 887 [2023-02-17 04:26:35,296 INFO L226 Difference]: Without dead ends: 815 [2023-02-17 04:26:35,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1387, Invalid=9533, Unknown=0, NotChecked=0, Total=10920 [2023-02-17 04:26:35,302 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 3240 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3240 SdHoareTripleChecker+Valid, 4339 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:35,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3240 Valid, 4339 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-17 04:26:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-02-17 04:26:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 304. [2023-02-17 04:26:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 292 states have (on average 1.2910958904109588) internal successors, (377), 293 states have internal predecessors, (377), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 392 transitions. [2023-02-17 04:26:35,413 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 392 transitions. Word has length 55 [2023-02-17 04:26:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:35,413 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 392 transitions. [2023-02-17 04:26:35,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.25531914893617) internal successors, (106), 46 states have internal predecessors, (106), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:26:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 392 transitions. [2023-02-17 04:26:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 04:26:35,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:35,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:35,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:35,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:35,619 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1004480119, now seen corresponding path program 3 times [2023-02-17 04:26:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517488240] [2023-02-17 04:26:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:26:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517488240] [2023-02-17 04:26:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517488240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:35,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196630471] [2023-02-17 04:26:35,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:26:35,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:35,773 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:35,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 04:26:35,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 04:26:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 04:26:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 04:26:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 04:26:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196630471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:36,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:36,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-02-17 04:26:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339832501] [2023-02-17 04:26:36,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 04:26:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 04:26:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:26:36,235 INFO L87 Difference]: Start difference. First operand 304 states and 392 transitions. Second operand has 25 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:37,343 INFO L93 Difference]: Finished difference Result 591 states and 773 transitions. [2023-02-17 04:26:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 04:26:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-17 04:26:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:37,350 INFO L225 Difference]: With dead ends: 591 [2023-02-17 04:26:37,350 INFO L226 Difference]: Without dead ends: 582 [2023-02-17 04:26:37,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2023-02-17 04:26:37,351 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 444 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:37,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1488 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 04:26:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-17 04:26:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 310. [2023-02-17 04:26:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 298 states have (on average 1.2953020134228188) internal successors, (386), 299 states have internal predecessors, (386), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 401 transitions. [2023-02-17 04:26:37,448 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 401 transitions. Word has length 55 [2023-02-17 04:26:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:37,448 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 401 transitions. [2023-02-17 04:26:37,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 401 transitions. [2023-02-17 04:26:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 04:26:37,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:37,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:37,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:37,654 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1737992177, now seen corresponding path program 4 times [2023-02-17 04:26:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682523915] [2023-02-17 04:26:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:38,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:38,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682523915] [2023-02-17 04:26:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682523915] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15172297] [2023-02-17 04:26:38,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:26:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:38,368 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:38,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 04:26:38,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:26:38,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-17 04:26:38,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:38,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:26:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:38,636 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:38,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:26:38,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 51 [2023-02-17 04:26:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:26:38,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 04:26:39,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15172297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:39,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:39,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 40 [2023-02-17 04:26:39,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665264039] [2023-02-17 04:26:39,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:39,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 04:26:39,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 04:26:39,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 04:26:39,045 INFO L87 Difference]: Start difference. First operand 310 states and 401 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:40,896 INFO L93 Difference]: Finished difference Result 588 states and 777 transitions. [2023-02-17 04:26:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 04:26:40,897 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-17 04:26:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:40,900 INFO L225 Difference]: With dead ends: 588 [2023-02-17 04:26:40,900 INFO L226 Difference]: Without dead ends: 557 [2023-02-17 04:26:40,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 04:26:40,904 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 717 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:40,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1680 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 04:26:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-02-17 04:26:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 323. [2023-02-17 04:26:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.2958199356913183) internal successors, (403), 312 states have internal predecessors, (403), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 418 transitions. [2023-02-17 04:26:41,034 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 418 transitions. Word has length 58 [2023-02-17 04:26:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:41,034 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 418 transitions. [2023-02-17 04:26:41,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 418 transitions. [2023-02-17 04:26:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 04:26:41,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:41,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:41,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:41,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:41,241 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash 162150685, now seen corresponding path program 5 times [2023-02-17 04:26:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407476329] [2023-02-17 04:26:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:41,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:41,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:41,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407476329] [2023-02-17 04:26:41,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407476329] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011801762] [2023-02-17 04:26:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:26:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:41,903 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:41,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 04:26:42,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 04:26:42,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-17 04:26:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:42,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:26:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:42,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:26:42,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 51 [2023-02-17 04:26:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:42,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 04:26:43,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011801762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:43,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:43,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 41 [2023-02-17 04:26:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230994932] [2023-02-17 04:26:43,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:43,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 04:26:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 04:26:43,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 04:26:43,327 INFO L87 Difference]: Start difference. First operand 323 states and 418 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:45,948 INFO L93 Difference]: Finished difference Result 905 states and 1192 transitions. [2023-02-17 04:26:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-17 04:26:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-17 04:26:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:45,951 INFO L225 Difference]: With dead ends: 905 [2023-02-17 04:26:45,951 INFO L226 Difference]: Without dead ends: 792 [2023-02-17 04:26:45,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=733, Invalid=5429, Unknown=0, NotChecked=0, Total=6162 [2023-02-17 04:26:45,952 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 703 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:45,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 2351 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-17 04:26:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-02-17 04:26:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 333. [2023-02-17 04:26:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 321 states have (on average 1.2990654205607477) internal successors, (417), 322 states have internal predecessors, (417), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 432 transitions. [2023-02-17 04:26:46,100 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 432 transitions. Word has length 58 [2023-02-17 04:26:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 432 transitions. [2023-02-17 04:26:46,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 432 transitions. [2023-02-17 04:26:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 04:26:46,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:46,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:46,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:46,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-17 04:26:46,308 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1550031143, now seen corresponding path program 6 times [2023-02-17 04:26:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:46,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628371735] [2023-02-17 04:26:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:46,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:46,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:46,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:26:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:46,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628371735] [2023-02-17 04:26:46,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628371735] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:46,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168491528] [2023-02-17 04:26:46,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:26:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:46,873 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:46,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 04:26:47,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-17 04:26:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:47,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-17 04:26:47,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:47,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:26:47,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:26:47,223 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:26:47,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:26:47,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 51 [2023-02-17 04:26:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 04:26:47,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 04:26:47,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168491528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:47,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:47,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 18] total 41 [2023-02-17 04:26:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446570838] [2023-02-17 04:26:47,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:47,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 04:26:47,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 04:26:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 04:26:47,652 INFO L87 Difference]: Start difference. First operand 333 states and 432 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:26:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:49,927 INFO L93 Difference]: Finished difference Result 646 states and 852 transitions. [2023-02-17 04:26:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 04:26:49,927 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2023-02-17 04:26:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:49,929 INFO L225 Difference]: With dead ends: 646 [2023-02-17 04:26:49,929 INFO L226 Difference]: Without dead ends: 615 [2023-02-17 04:26:49,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=647, Invalid=4045, Unknown=0, NotChecked=0, Total=4692 [2023-02-17 04:26:49,931 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 631 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:49,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 2023 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 04:26:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-02-17 04:26:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 334. [2023-02-17 04:26:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 322 states have (on average 1.2981366459627328) internal successors, (418), 323 states have internal predecessors, (418), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 433 transitions. [2023-02-17 04:26:50,089 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 433 transitions. Word has length 58 [2023-02-17 04:26:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:50,089 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 433 transitions. [2023-02-17 04:26:50,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:26:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 433 transitions. [2023-02-17 04:26:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 04:26:50,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:50,111 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:50,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 04:26:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-17 04:26:50,316 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1241898395, now seen corresponding path program 1 times [2023-02-17 04:26:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019868442] [2023-02-17 04:26:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:50,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:50,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 04:26:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019868442] [2023-02-17 04:26:50,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019868442] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209218483] [2023-02-17 04:26:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:50,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:50,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:50,448 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:50,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 04:26:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 04:26:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 04:26:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 04:26:50,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209218483] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:50,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:50,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2023-02-17 04:26:50,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548620148] [2023-02-17 04:26:50,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 04:26:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 04:26:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-02-17 04:26:50,729 INFO L87 Difference]: Start difference. First operand 334 states and 433 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:26:52,127 INFO L93 Difference]: Finished difference Result 800 states and 1034 transitions. [2023-02-17 04:26:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-17 04:26:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-17 04:26:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:26:52,137 INFO L225 Difference]: With dead ends: 800 [2023-02-17 04:26:52,137 INFO L226 Difference]: Without dead ends: 633 [2023-02-17 04:26:52,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 04:26:52,138 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1574 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:26:52,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 2021 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 04:26:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-02-17 04:26:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 337. [2023-02-17 04:26:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 325 states have (on average 1.2707692307692309) internal successors, (413), 326 states have internal predecessors, (413), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:26:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 428 transitions. [2023-02-17 04:26:52,297 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 428 transitions. Word has length 58 [2023-02-17 04:26:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:26:52,297 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 428 transitions. [2023-02-17 04:26:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:26:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 428 transitions. [2023-02-17 04:26:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 04:26:52,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:26:52,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:26:52,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-17 04:26:52,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-17 04:26:52,501 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:26:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:26:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1055768665, now seen corresponding path program 4 times [2023-02-17 04:26:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:26:52,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329257704] [2023-02-17 04:26:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:26:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:26:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:52,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:26:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:52,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:26:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:26:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:26:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:26:52,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329257704] [2023-02-17 04:26:52,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329257704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:26:52,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124866015] [2023-02-17 04:26:52,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:26:52,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:26:52,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:26:52,827 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:26:52,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 04:26:52,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:26:52,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:26:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 04:26:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:26:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 04:26:53,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:26:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 04:26:53,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124866015] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:26:53,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:26:53,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2023-02-17 04:26:53,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333256249] [2023-02-17 04:26:53,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:26:53,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 04:26:53,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:26:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 04:26:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-02-17 04:26:53,332 INFO L87 Difference]: Start difference. First operand 337 states and 428 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:27:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:27:00,613 INFO L93 Difference]: Finished difference Result 1462 states and 1881 transitions. [2023-02-17 04:27:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-17 04:27:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 59 [2023-02-17 04:27:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:27:00,617 INFO L225 Difference]: With dead ends: 1462 [2023-02-17 04:27:00,617 INFO L226 Difference]: Without dead ends: 1454 [2023-02-17 04:27:00,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3359 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1233, Invalid=9897, Unknown=0, NotChecked=0, Total=11130 [2023-02-17 04:27:00,619 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1694 mSDsluCounter, 3536 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 3811 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:27:00,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 3811 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-17 04:27:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2023-02-17 04:27:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 340. [2023-02-17 04:27:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 328 states have (on average 1.2682926829268293) internal successors, (416), 329 states have internal predecessors, (416), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 04:27:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 431 transitions. [2023-02-17 04:27:00,758 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 431 transitions. Word has length 59 [2023-02-17 04:27:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:27:00,759 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 431 transitions. [2023-02-17 04:27:00,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:27:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 431 transitions. [2023-02-17 04:27:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-17 04:27:00,760 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:27:00,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:27:00,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-17 04:27:00,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:00,965 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:27:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:27:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1948639156, now seen corresponding path program 1 times [2023-02-17 04:27:00,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:27:00,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947999679] [2023-02-17 04:27:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:27:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:27:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:01,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:27:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 04:27:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:01,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-02-17 04:27:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 04:27:01,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:27:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947999679] [2023-02-17 04:27:01,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947999679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076881707] [2023-02-17 04:27:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:01,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:27:01,259 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:27:01,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 04:27:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 04:27:01,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:27:01,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:27:01,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:27:01,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 51 [2023-02-17 04:27:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:27:01,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:27:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:27:01,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076881707] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:01,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 04:27:01,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14, 11] total 23 [2023-02-17 04:27:01,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157914956] [2023-02-17 04:27:01,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:27:01,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 04:27:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:27:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 04:27:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-02-17 04:27:01,487 INFO L87 Difference]: Start difference. First operand 340 states and 431 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 04:27:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:27:01,868 INFO L93 Difference]: Finished difference Result 475 states and 609 transitions. [2023-02-17 04:27:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 04:27:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2023-02-17 04:27:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:27:01,870 INFO L225 Difference]: With dead ends: 475 [2023-02-17 04:27:01,870 INFO L226 Difference]: Without dead ends: 452 [2023-02-17 04:27:01,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2023-02-17 04:27:01,870 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 76 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:27:01,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 468 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:27:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-02-17 04:27:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 351. [2023-02-17 04:27:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 338 states have (on average 1.2603550295857988) internal successors, (426), 339 states have internal predecessors, (426), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 04:27:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 443 transitions. [2023-02-17 04:27:02,017 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 443 transitions. Word has length 62 [2023-02-17 04:27:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:27:02,017 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 443 transitions. [2023-02-17 04:27:02,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 04:27:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 443 transitions. [2023-02-17 04:27:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 04:27:02,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:27:02,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:27:02,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-17 04:27:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-17 04:27:02,223 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:27:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:27:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1380776590, now seen corresponding path program 1 times [2023-02-17 04:27:02,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:27:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737957938] [2023-02-17 04:27:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:02,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:27:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:02,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:27:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:27:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:02,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-17 04:27:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:02,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-17 04:27:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:27:02,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:27:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737957938] [2023-02-17 04:27:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737957938] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427629830] [2023-02-17 04:27:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:02,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:27:02,599 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:27:02,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-17 04:27:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 04:27:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:27:02,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:27:02,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:27:02,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 51 [2023-02-17 04:27:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 04:27:03,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:27:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 04:27:03,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427629830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:27:03,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:27:03,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 42 [2023-02-17 04:27:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958600751] [2023-02-17 04:27:03,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:27:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-17 04:27:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:27:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-17 04:27:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 04:27:03,287 INFO L87 Difference]: Start difference. First operand 351 states and 443 transitions. Second operand has 42 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 40 states have internal predecessors, (118), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-17 04:27:05,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 04:27:07,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 04:27:09,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-17 04:27:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:27:10,834 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2023-02-17 04:27:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 04:27:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 40 states have internal predecessors, (118), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2023-02-17 04:27:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:27:10,837 INFO L225 Difference]: With dead ends: 558 [2023-02-17 04:27:10,837 INFO L226 Difference]: Without dead ends: 556 [2023-02-17 04:27:10,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2023-02-17 04:27:10,838 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 305 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-02-17 04:27:10,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 974 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1410 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2023-02-17 04:27:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-02-17 04:27:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 477. [2023-02-17 04:27:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 453 states have (on average 1.2737306843267109) internal successors, (577), 456 states have internal predecessors, (577), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:27:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 607 transitions. [2023-02-17 04:27:11,111 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 607 transitions. Word has length 63 [2023-02-17 04:27:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:27:11,111 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 607 transitions. [2023-02-17 04:27:11,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 40 states have internal predecessors, (118), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-17 04:27:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 607 transitions. [2023-02-17 04:27:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-17 04:27:11,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:27:11,112 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:27:11,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-17 04:27:11,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-17 04:27:11,318 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:27:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:27:11,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1543427385, now seen corresponding path program 1 times [2023-02-17 04:27:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:27:11,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937941213] [2023-02-17 04:27:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:11,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:27:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:11,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:27:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:11,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:27:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 04:27:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:27:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937941213] [2023-02-17 04:27:11,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937941213] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432869276] [2023-02-17 04:27:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:27:11,510 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:27:11,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-17 04:27:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 04:27:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:27:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 04:27:11,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:27:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-17 04:27:11,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432869276] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:27:11,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:27:11,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 27 [2023-02-17 04:27:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141747126] [2023-02-17 04:27:11,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:27:11,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 04:27:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:27:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 04:27:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2023-02-17 04:27:11,770 INFO L87 Difference]: Start difference. First operand 477 states and 607 transitions. Second operand has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:27:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:27:12,542 INFO L93 Difference]: Finished difference Result 715 states and 915 transitions. [2023-02-17 04:27:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 04:27:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2023-02-17 04:27:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:27:12,547 INFO L225 Difference]: With dead ends: 715 [2023-02-17 04:27:12,548 INFO L226 Difference]: Without dead ends: 567 [2023-02-17 04:27:12,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 04:27:12,549 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 137 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:27:12,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1391 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:27:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-02-17 04:27:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 478. [2023-02-17 04:27:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 454 states have (on average 1.2819383259911894) internal successors, (582), 457 states have internal predecessors, (582), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:27:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 612 transitions. [2023-02-17 04:27:12,821 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 612 transitions. Word has length 62 [2023-02-17 04:27:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:27:12,821 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 612 transitions. [2023-02-17 04:27:12,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:27:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 612 transitions. [2023-02-17 04:27:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-17 04:27:12,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:27:12,823 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:27:12,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-17 04:27:13,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-17 04:27:13,028 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:27:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:27:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1579304483, now seen corresponding path program 5 times [2023-02-17 04:27:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:27:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274941536] [2023-02-17 04:27:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:13,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:27:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:13,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:27:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:13,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:27:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 04:27:13,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:27:13,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274941536] [2023-02-17 04:27:13,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274941536] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:13,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016406332] [2023-02-17 04:27:13,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:27:13,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:13,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:27:13,693 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:27:13,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-17 04:27:21,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-17 04:27:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:27:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-17 04:27:21,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:27:21,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:27:22,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:27:22,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 62 [2023-02-17 04:27:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 04:27:22,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:27:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 04:27:23,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016406332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:27:23,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:27:23,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 16] total 57 [2023-02-17 04:27:23,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341212728] [2023-02-17 04:27:23,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:27:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-17 04:27:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:27:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-17 04:27:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2821, Unknown=0, NotChecked=0, Total=3192 [2023-02-17 04:27:23,010 INFO L87 Difference]: Start difference. First operand 478 states and 612 transitions. Second operand has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 56 states have internal predecessors, (132), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 04:27:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:27:31,328 INFO L93 Difference]: Finished difference Result 1307 states and 1730 transitions. [2023-02-17 04:27:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-17 04:27:31,328 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 56 states have internal predecessors, (132), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2023-02-17 04:27:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:27:31,333 INFO L225 Difference]: With dead ends: 1307 [2023-02-17 04:27:31,333 INFO L226 Difference]: Without dead ends: 1246 [2023-02-17 04:27:31,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1762, Invalid=15008, Unknown=0, NotChecked=0, Total=16770 [2023-02-17 04:27:31,335 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1170 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 6656 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5020 SdHoareTripleChecker+Invalid, 6868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 6656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:27:31,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 5020 Invalid, 6868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 6656 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-02-17 04:27:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-02-17 04:27:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 504. [2023-02-17 04:27:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 480 states have (on average 1.2854166666666667) internal successors, (617), 483 states have internal predecessors, (617), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:27:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 647 transitions. [2023-02-17 04:27:31,733 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 647 transitions. Word has length 62 [2023-02-17 04:27:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:27:31,733 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 647 transitions. [2023-02-17 04:27:31,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 56 states have internal predecessors, (132), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 04:27:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 647 transitions. [2023-02-17 04:27:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 04:27:31,735 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:27:31,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:27:31,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-17 04:27:31,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-17 04:27:31,943 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:27:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:27:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -955126345, now seen corresponding path program 7 times [2023-02-17 04:27:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:27:31,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965515632] [2023-02-17 04:27:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:27:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:27:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:27:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 04:27:32,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:27:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965515632] [2023-02-17 04:27:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965515632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002056657] [2023-02-17 04:27:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:27:32,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:27:32,124 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:27:32,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-17 04:27:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 04:27:32,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:27:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 04:27:32,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:27:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 04:27:32,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002056657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:27:32,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:27:32,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2023-02-17 04:27:32,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327195498] [2023-02-17 04:27:32,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:27:32,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 04:27:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:27:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 04:27:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-02-17 04:27:32,594 INFO L87 Difference]: Start difference. First operand 504 states and 647 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:27:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:27:35,386 INFO L93 Difference]: Finished difference Result 2820 states and 3723 transitions. [2023-02-17 04:27:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 04:27:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-02-17 04:27:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:27:35,394 INFO L225 Difference]: With dead ends: 2820 [2023-02-17 04:27:35,394 INFO L226 Difference]: Without dead ends: 2695 [2023-02-17 04:27:35,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=544, Invalid=2426, Unknown=0, NotChecked=0, Total=2970 [2023-02-17 04:27:35,400 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1839 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:27:35,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1847 Valid, 1673 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 04:27:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2023-02-17 04:27:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 583. [2023-02-17 04:27:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 559 states have (on average 1.289803220035778) internal successors, (721), 562 states have internal predecessors, (721), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:27:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 751 transitions. [2023-02-17 04:27:35,707 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 751 transitions. Word has length 63 [2023-02-17 04:27:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:27:35,708 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 751 transitions. [2023-02-17 04:27:35,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:27:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 751 transitions. [2023-02-17 04:27:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 04:27:35,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:27:35,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:27:35,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-17 04:27:35,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-17 04:27:35,914 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:27:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:27:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1236099801, now seen corresponding path program 6 times [2023-02-17 04:27:35,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:27:35,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175337161] [2023-02-17 04:27:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:27:35,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:27:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:27:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:27:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:27:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 04:27:36,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:27:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175337161] [2023-02-17 04:27:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175337161] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:27:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125834036] [2023-02-17 04:27:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:27:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:27:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:27:36,542 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:27:36,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-17 04:27:37,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-17 04:27:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:27:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 04:27:37,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:27:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 04:27:37,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:27:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 04:27:39,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125834036] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:27:39,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:27:39,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 25] total 67 [2023-02-17 04:27:39,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685809629] [2023-02-17 04:27:39,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:27:39,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-17 04:27:39,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:27:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-17 04:27:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=3862, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 04:27:39,799 INFO L87 Difference]: Start difference. First operand 583 states and 751 transitions. Second operand has 67 states, 67 states have (on average 2.208955223880597) internal successors, (148), 66 states have internal predecessors, (148), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 04:28:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:01,636 INFO L93 Difference]: Finished difference Result 3252 states and 4312 transitions. [2023-02-17 04:28:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-02-17 04:28:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.208955223880597) internal successors, (148), 66 states have internal predecessors, (148), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2023-02-17 04:28:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:01,643 INFO L225 Difference]: With dead ends: 3252 [2023-02-17 04:28:01,643 INFO L226 Difference]: Without dead ends: 2596 [2023-02-17 04:28:01,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7388 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=4630, Invalid=22101, Unknown=1, NotChecked=0, Total=26732 [2023-02-17 04:28:01,647 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 5988 mSDsluCounter, 6405 mSDsCounter, 0 mSdLazyCounter, 5746 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5988 SdHoareTripleChecker+Valid, 6705 SdHoareTripleChecker+Invalid, 6483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 5746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:01,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5988 Valid, 6705 Invalid, 6483 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [737 Valid, 5746 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-02-17 04:28:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2023-02-17 04:28:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 718. [2023-02-17 04:28:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 694 states have (on average 1.2953890489913544) internal successors, (899), 697 states have internal predecessors, (899), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 929 transitions. [2023-02-17 04:28:02,067 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 929 transitions. Word has length 65 [2023-02-17 04:28:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:02,068 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 929 transitions. [2023-02-17 04:28:02,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.208955223880597) internal successors, (148), 66 states have internal predecessors, (148), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 04:28:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 929 transitions. [2023-02-17 04:28:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 04:28:02,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:02,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:02,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-17 04:28:02,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:02,274 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1743715225, now seen corresponding path program 8 times [2023-02-17 04:28:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100060724] [2023-02-17 04:28:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:02,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:02,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 04:28:02,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:02,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100060724] [2023-02-17 04:28:02,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100060724] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:02,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739253333] [2023-02-17 04:28:02,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:28:02,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:02,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:02,561 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:02,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-17 04:28:02,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:28:02,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:28:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 04:28:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:28:02,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 04:28:03,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739253333] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:03,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:03,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 13] total 33 [2023-02-17 04:28:03,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990145910] [2023-02-17 04:28:03,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:03,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 04:28:03,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 04:28:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 04:28:03,094 INFO L87 Difference]: Start difference. First operand 718 states and 929 transitions. Second operand has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 33 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:28:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:09,465 INFO L93 Difference]: Finished difference Result 3872 states and 5102 transitions. [2023-02-17 04:28:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-17 04:28:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 33 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2023-02-17 04:28:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:09,473 INFO L225 Difference]: With dead ends: 3872 [2023-02-17 04:28:09,474 INFO L226 Difference]: Without dead ends: 3522 [2023-02-17 04:28:09,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 99 SyntacticMatches, 22 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2151, Invalid=15405, Unknown=0, NotChecked=0, Total=17556 [2023-02-17 04:28:09,476 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 2073 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 2963 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 3780 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:09,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 3780 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2963 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-17 04:28:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2023-02-17 04:28:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 663. [2023-02-17 04:28:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 639 states have (on average 1.2910798122065728) internal successors, (825), 642 states have internal predecessors, (825), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 855 transitions. [2023-02-17 04:28:10,012 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 855 transitions. Word has length 65 [2023-02-17 04:28:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:10,012 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 855 transitions. [2023-02-17 04:28:10,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 33 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:28:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 855 transitions. [2023-02-17 04:28:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:28:10,014 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:10,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:10,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:10,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-17 04:28:10,220 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash -779274050, now seen corresponding path program 1 times [2023-02-17 04:28:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:10,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879797610] [2023-02-17 04:28:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:10,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:10,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-17 04:28:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:10,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-17 04:28:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 04:28:10,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:10,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879797610] [2023-02-17 04:28:10,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879797610] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:28:10,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:28:10,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 04:28:10,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300545699] [2023-02-17 04:28:10,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:28:10,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 04:28:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 04:28:10,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:28:10,264 INFO L87 Difference]: Start difference. First operand 663 states and 855 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 04:28:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:10,761 INFO L93 Difference]: Finished difference Result 707 states and 908 transitions. [2023-02-17 04:28:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 04:28:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2023-02-17 04:28:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:10,763 INFO L225 Difference]: With dead ends: 707 [2023-02-17 04:28:10,763 INFO L226 Difference]: Without dead ends: 667 [2023-02-17 04:28:10,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 04:28:10,764 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:10,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:28:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2023-02-17 04:28:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 663. [2023-02-17 04:28:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 639 states have (on average 1.2863849765258215) internal successors, (822), 642 states have internal predecessors, (822), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 852 transitions. [2023-02-17 04:28:11,139 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 852 transitions. Word has length 68 [2023-02-17 04:28:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:11,139 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 852 transitions. [2023-02-17 04:28:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 04:28:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 852 transitions. [2023-02-17 04:28:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-17 04:28:11,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:11,141 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-17 04:28:11,141 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash 540740911, now seen corresponding path program 1 times [2023-02-17 04:28:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357998548] [2023-02-17 04:28:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 04:28:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 04:28:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-17 04:28:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 04:28:11,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357998548] [2023-02-17 04:28:11,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357998548] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257268970] [2023-02-17 04:28:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:11,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:11,266 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-17 04:28:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 04:28:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 04:28:11,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 04:28:11,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257268970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:11,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:11,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-02-17 04:28:11,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73576024] [2023-02-17 04:28:11,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:11,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 04:28:11,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 04:28:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-02-17 04:28:11,501 INFO L87 Difference]: Start difference. First operand 663 states and 852 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-17 04:28:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:12,255 INFO L93 Difference]: Finished difference Result 801 states and 1021 transitions. [2023-02-17 04:28:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 04:28:12,255 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 70 [2023-02-17 04:28:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:12,260 INFO L225 Difference]: With dead ends: 801 [2023-02-17 04:28:12,260 INFO L226 Difference]: Without dead ends: 689 [2023-02-17 04:28:12,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2023-02-17 04:28:12,261 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 144 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:12,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 618 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:28:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-02-17 04:28:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 653. [2023-02-17 04:28:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 629 states have (on average 1.2845786963434023) internal successors, (808), 632 states have internal predecessors, (808), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 838 transitions. [2023-02-17 04:28:12,637 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 838 transitions. Word has length 70 [2023-02-17 04:28:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:12,637 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 838 transitions. [2023-02-17 04:28:12,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-17 04:28:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 838 transitions. [2023-02-17 04:28:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-17 04:28:12,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:12,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:12,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:12,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:12,855 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:12,855 INFO L85 PathProgramCache]: Analyzing trace with hash 211134459, now seen corresponding path program 7 times [2023-02-17 04:28:12,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:12,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433683479] [2023-02-17 04:28:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:12,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:13,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-17 04:28:13,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433683479] [2023-02-17 04:28:13,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433683479] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734488741] [2023-02-17 04:28:13,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:28:13,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:13,293 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:13,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-17 04:28:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:13,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 04:28:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 04:28:13,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-17 04:28:13,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734488741] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:13,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:13,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 33 [2023-02-17 04:28:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822318060] [2023-02-17 04:28:13,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:13,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 04:28:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 04:28:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 04:28:13,845 INFO L87 Difference]: Start difference. First operand 653 states and 838 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:28:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:15,905 INFO L93 Difference]: Finished difference Result 996 states and 1276 transitions. [2023-02-17 04:28:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 04:28:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2023-02-17 04:28:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:15,915 INFO L225 Difference]: With dead ends: 996 [2023-02-17 04:28:15,916 INFO L226 Difference]: Without dead ends: 954 [2023-02-17 04:28:15,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=2141, Unknown=0, NotChecked=0, Total=2450 [2023-02-17 04:28:15,917 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 778 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:15,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1630 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 04:28:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-02-17 04:28:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 621. [2023-02-17 04:28:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 597 states have (on average 1.2914572864321607) internal successors, (771), 600 states have internal predecessors, (771), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 801 transitions. [2023-02-17 04:28:16,317 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 801 transitions. Word has length 67 [2023-02-17 04:28:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:16,317 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 801 transitions. [2023-02-17 04:28:16,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:28:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 801 transitions. [2023-02-17 04:28:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:28:16,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:16,334 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:16,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:16,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-17 04:28:16,535 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1326890679, now seen corresponding path program 3 times [2023-02-17 04:28:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:16,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373155558] [2023-02-17 04:28:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:16,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:16,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 04:28:16,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373155558] [2023-02-17 04:28:16,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373155558] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382641314] [2023-02-17 04:28:16,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:28:16,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:16,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:16,741 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:16,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-17 04:28:17,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 04:28:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:28:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 04:28:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-17 04:28:17,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:28:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382641314] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:17,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:17,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 14] total 39 [2023-02-17 04:28:17,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057058656] [2023-02-17 04:28:17,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:17,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 04:28:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 04:28:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 04:28:17,814 INFO L87 Difference]: Start difference. First operand 621 states and 801 transitions. Second operand has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 37 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:19,371 INFO L93 Difference]: Finished difference Result 712 states and 918 transitions. [2023-02-17 04:28:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 04:28:19,372 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 37 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-17 04:28:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:19,373 INFO L225 Difference]: With dead ends: 712 [2023-02-17 04:28:19,373 INFO L226 Difference]: Without dead ends: 641 [2023-02-17 04:28:19,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 04:28:19,374 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 243 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:19,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1416 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 04:28:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-02-17 04:28:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 623. [2023-02-17 04:28:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 599 states have (on average 1.2971619365609348) internal successors, (777), 602 states have internal predecessors, (777), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 807 transitions. [2023-02-17 04:28:19,756 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 807 transitions. Word has length 68 [2023-02-17 04:28:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:19,756 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 807 transitions. [2023-02-17 04:28:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 37 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 807 transitions. [2023-02-17 04:28:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:28:19,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:19,758 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:19,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:19,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-17 04:28:19,965 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1736078367, now seen corresponding path program 9 times [2023-02-17 04:28:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:19,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852748226] [2023-02-17 04:28:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:20,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:20,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:28:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852748226] [2023-02-17 04:28:20,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852748226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786095494] [2023-02-17 04:28:20,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:28:20,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:20,639 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:20,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-17 04:28:22,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 04:28:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:28:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-17 04:28:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:22,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:28:23,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:28:23,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 30 [2023-02-17 04:28:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 04:28:23,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 04:28:24,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786095494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:24,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:24,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 18] total 60 [2023-02-17 04:28:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686596467] [2023-02-17 04:28:24,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:24,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-17 04:28:24,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-17 04:28:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=3144, Unknown=0, NotChecked=0, Total=3540 [2023-02-17 04:28:24,364 INFO L87 Difference]: Start difference. First operand 623 states and 807 transitions. Second operand has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:31,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:31,890 INFO L93 Difference]: Finished difference Result 1298 states and 1704 transitions. [2023-02-17 04:28:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-17 04:28:31,890 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-17 04:28:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:31,892 INFO L225 Difference]: With dead ends: 1298 [2023-02-17 04:28:31,892 INFO L226 Difference]: Without dead ends: 1234 [2023-02-17 04:28:31,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2806 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1291, Invalid=9839, Unknown=0, NotChecked=0, Total=11130 [2023-02-17 04:28:31,894 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1132 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 4465 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 4654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:31,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 2081 Invalid, 4654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4465 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-17 04:28:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2023-02-17 04:28:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 647. [2023-02-17 04:28:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 623 states have (on average 1.2953451043338684) internal successors, (807), 626 states have internal predecessors, (807), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 837 transitions. [2023-02-17 04:28:32,297 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 837 transitions. Word has length 68 [2023-02-17 04:28:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:32,297 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 837 transitions. [2023-02-17 04:28:32,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 837 transitions. [2023-02-17 04:28:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:28:32,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:32,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:32,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:32,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-17 04:28:32,504 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1681493005, now seen corresponding path program 10 times [2023-02-17 04:28:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:32,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845545214] [2023-02-17 04:28:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:32,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:33,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:28:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845545214] [2023-02-17 04:28:33,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845545214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809804806] [2023-02-17 04:28:33,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:28:33,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:33,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:33,199 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:33,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-17 04:28:33,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:28:33,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:28:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-17 04:28:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:33,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:28:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 04:28:34,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-17 04:28:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809804806] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:34,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 15] total 57 [2023-02-17 04:28:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704412172] [2023-02-17 04:28:34,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:34,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-17 04:28:34,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-17 04:28:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2854, Unknown=0, NotChecked=0, Total=3192 [2023-02-17 04:28:34,618 INFO L87 Difference]: Start difference. First operand 647 states and 837 transitions. Second operand has 57 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:39,820 INFO L93 Difference]: Finished difference Result 1621 states and 2121 transitions. [2023-02-17 04:28:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-17 04:28:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-17 04:28:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:39,823 INFO L225 Difference]: With dead ends: 1621 [2023-02-17 04:28:39,823 INFO L226 Difference]: Without dead ends: 1438 [2023-02-17 04:28:39,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1566, Invalid=10424, Unknown=0, NotChecked=0, Total=11990 [2023-02-17 04:28:39,824 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1155 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 4295 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 4543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 4295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:39,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 2043 Invalid, 4543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 4295 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-17 04:28:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2023-02-17 04:28:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 648. [2023-02-17 04:28:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 624 states have (on average 1.2884615384615385) internal successors, (804), 627 states have internal predecessors, (804), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 834 transitions. [2023-02-17 04:28:40,247 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 834 transitions. Word has length 68 [2023-02-17 04:28:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:40,248 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 834 transitions. [2023-02-17 04:28:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 834 transitions. [2023-02-17 04:28:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:28:40,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:40,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:40,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:40,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-17 04:28:40,454 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1104262353, now seen corresponding path program 11 times [2023-02-17 04:28:40,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:40,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929087100] [2023-02-17 04:28:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:40,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:41,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:28:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:28:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:28:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:28:41,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:28:41,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929087100] [2023-02-17 04:28:41,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929087100] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:28:41,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899771279] [2023-02-17 04:28:41,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:28:41,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:28:41,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:28:41,047 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:28:41,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-17 04:28:52,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-17 04:28:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:28:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-17 04:28:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:28:52,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:28:52,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:28:52,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:28:52,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 30 [2023-02-17 04:28:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:28:52,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:28:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 04:28:54,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899771279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:28:54,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:28:54,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 17] total 62 [2023-02-17 04:28:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541783443] [2023-02-17 04:28:54,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:28:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-17 04:28:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:28:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-17 04:28:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3376, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 04:28:54,979 INFO L87 Difference]: Start difference. First operand 648 states and 834 transitions. Second operand has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 61 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:28:58,886 INFO L93 Difference]: Finished difference Result 1326 states and 1719 transitions. [2023-02-17 04:28:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 04:28:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 61 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-17 04:28:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:28:58,890 INFO L225 Difference]: With dead ends: 1326 [2023-02-17 04:28:58,890 INFO L226 Difference]: Without dead ends: 1262 [2023-02-17 04:28:58,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=825, Invalid=5981, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 04:28:58,900 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 433 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 4131 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 4184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 4131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:28:58,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 2897 Invalid, 4184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 4131 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-17 04:28:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2023-02-17 04:28:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 670. [2023-02-17 04:28:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 646 states have (on average 1.2817337461300309) internal successors, (828), 649 states have internal predecessors, (828), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:28:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 858 transitions. [2023-02-17 04:28:59,367 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 858 transitions. Word has length 68 [2023-02-17 04:28:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:28:59,367 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 858 transitions. [2023-02-17 04:28:59,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 61 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 04:28:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 858 transitions. [2023-02-17 04:28:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:28:59,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:28:59,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:28:59,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-17 04:28:59,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-17 04:28:59,575 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:28:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:28:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash -797080539, now seen corresponding path program 12 times [2023-02-17 04:28:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:28:59,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789674831] [2023-02-17 04:28:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:28:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:28:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:00,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:29:00,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789674831] [2023-02-17 04:29:00,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789674831] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354848000] [2023-02-17 04:29:00,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:29:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:00,209 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:00,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-17 04:29:00,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-17 04:29:00,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:29:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-17 04:29:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:00,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:29:00,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:29:00,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 54 [2023-02-17 04:29:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-17 04:29:00,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:29:01,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:29:01,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 218 [2023-02-17 04:29:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-17 04:29:04,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354848000] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:29:04,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:29:04,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 13] total 44 [2023-02-17 04:29:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248372754] [2023-02-17 04:29:04,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:29:04,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-17 04:29:04,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:29:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-17 04:29:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2023-02-17 04:29:04,541 INFO L87 Difference]: Start difference. First operand 670 states and 858 transitions. Second operand has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 42 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 04:29:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:29:09,354 INFO L93 Difference]: Finished difference Result 1529 states and 1991 transitions. [2023-02-17 04:29:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-17 04:29:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 42 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2023-02-17 04:29:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:29:09,357 INFO L225 Difference]: With dead ends: 1529 [2023-02-17 04:29:09,357 INFO L226 Difference]: Without dead ends: 1346 [2023-02-17 04:29:09,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2023-02-17 04:29:09,358 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 773 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:29:09,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 1884 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-17 04:29:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2023-02-17 04:29:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 676. [2023-02-17 04:29:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 652 states have (on average 1.2760736196319018) internal successors, (832), 655 states have internal predecessors, (832), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:29:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 862 transitions. [2023-02-17 04:29:09,810 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 862 transitions. Word has length 68 [2023-02-17 04:29:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:29:09,810 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 862 transitions. [2023-02-17 04:29:09,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 42 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 04:29:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 862 transitions. [2023-02-17 04:29:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 04:29:09,811 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:29:09,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:29:09,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-17 04:29:10,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:10,017 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:29:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:29:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1785704929, now seen corresponding path program 13 times [2023-02-17 04:29:10,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:29:10,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278970360] [2023-02-17 04:29:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:29:10,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:29:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:10,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:10,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:29:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278970360] [2023-02-17 04:29:10,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278970360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095151210] [2023-02-17 04:29:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:29:10,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:10,619 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:10,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-17 04:29:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:10,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-17 04:29:10,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:10,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 04:29:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:29:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:29:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 04:29:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:29:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:29:11,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 04:29:11,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:29:11,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 75 [2023-02-17 04:29:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 04:29:11,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:29:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 04:29:11,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095151210] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:29:11,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:29:11,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 16] total 37 [2023-02-17 04:29:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210980333] [2023-02-17 04:29:11,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:29:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-17 04:29:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:29:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-17 04:29:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 04:29:11,471 INFO L87 Difference]: Start difference. First operand 676 states and 862 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:29:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:29:13,628 INFO L93 Difference]: Finished difference Result 1237 states and 1601 transitions. [2023-02-17 04:29:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 04:29:13,629 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 68 [2023-02-17 04:29:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:29:13,631 INFO L225 Difference]: With dead ends: 1237 [2023-02-17 04:29:13,631 INFO L226 Difference]: Without dead ends: 1173 [2023-02-17 04:29:13,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 108 SyntacticMatches, 17 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 04:29:13,632 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 207 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:29:13,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1766 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 04:29:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-02-17 04:29:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 688. [2023-02-17 04:29:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 664 states have (on average 1.2740963855421688) internal successors, (846), 667 states have internal predecessors, (846), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:29:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 876 transitions. [2023-02-17 04:29:14,092 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 876 transitions. Word has length 68 [2023-02-17 04:29:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:29:14,092 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 876 transitions. [2023-02-17 04:29:14,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:29:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 876 transitions. [2023-02-17 04:29:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 04:29:14,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:29:14,094 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:29:14,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-17 04:29:14,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-17 04:29:14,298 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:29:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:29:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -781581091, now seen corresponding path program 8 times [2023-02-17 04:29:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:29:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657332332] [2023-02-17 04:29:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:29:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:29:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:14,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:14,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 04:29:14,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:14,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657332332] [2023-02-17 04:29:14,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657332332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:14,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606241593] [2023-02-17 04:29:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:29:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:14,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:14,651 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:14,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-17 04:29:14,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:29:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:29:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 04:29:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 04:29:14,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:29:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-17 04:29:15,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606241593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:29:15,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:29:15,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 12] total 39 [2023-02-17 04:29:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021577582] [2023-02-17 04:29:15,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:29:15,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 04:29:15,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:29:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 04:29:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 04:29:15,279 INFO L87 Difference]: Start difference. First operand 688 states and 876 transitions. Second operand has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:29:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:29:33,677 INFO L93 Difference]: Finished difference Result 4285 states and 5497 transitions. [2023-02-17 04:29:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-02-17 04:29:33,677 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 69 [2023-02-17 04:29:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:29:33,683 INFO L225 Difference]: With dead ends: 4285 [2023-02-17 04:29:33,683 INFO L226 Difference]: Without dead ends: 4277 [2023-02-17 04:29:33,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6279 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1855, Invalid=17885, Unknown=0, NotChecked=0, Total=19740 [2023-02-17 04:29:33,685 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 2596 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 2932 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2596 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 3290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:29:33,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2596 Valid, 3553 Invalid, 3290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2932 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-02-17 04:29:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2023-02-17 04:29:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 691. [2023-02-17 04:29:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 667 states have (on average 1.272863568215892) internal successors, (849), 670 states have internal predecessors, (849), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:29:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 879 transitions. [2023-02-17 04:29:34,223 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 879 transitions. Word has length 69 [2023-02-17 04:29:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:29:34,223 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 879 transitions. [2023-02-17 04:29:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:29:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 879 transitions. [2023-02-17 04:29:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-17 04:29:34,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:29:34,225 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:29:34,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-17 04:29:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:34,429 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:29:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:29:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1078383189, now seen corresponding path program 2 times [2023-02-17 04:29:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:29:34,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887181728] [2023-02-17 04:29:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:29:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:29:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:34,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:34,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-17 04:29:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:34,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-17 04:29:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-17 04:29:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-17 04:29:34,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887181728] [2023-02-17 04:29:34,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887181728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923563753] [2023-02-17 04:29:34,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:29:34,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:34,537 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:34,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-17 04:29:34,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:29:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:29:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 04:29:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-17 04:29:34,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:29:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:29:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923563753] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:29:34,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:29:34,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 25 [2023-02-17 04:29:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179557374] [2023-02-17 04:29:34,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:29:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 04:29:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:29:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 04:29:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:29:34,923 INFO L87 Difference]: Start difference. First operand 691 states and 879 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-17 04:29:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:29:36,774 INFO L93 Difference]: Finished difference Result 1116 states and 1429 transitions. [2023-02-17 04:29:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 04:29:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 74 [2023-02-17 04:29:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:29:36,776 INFO L225 Difference]: With dead ends: 1116 [2023-02-17 04:29:36,776 INFO L226 Difference]: Without dead ends: 1019 [2023-02-17 04:29:36,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=1476, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 04:29:36,777 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 284 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 04:29:36,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 974 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 04:29:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2023-02-17 04:29:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 693. [2023-02-17 04:29:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 669 states have (on average 1.2615844544095665) internal successors, (844), 672 states have internal predecessors, (844), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:29:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 874 transitions. [2023-02-17 04:29:37,291 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 874 transitions. Word has length 74 [2023-02-17 04:29:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:29:37,291 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 874 transitions. [2023-02-17 04:29:37,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-17 04:29:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 874 transitions. [2023-02-17 04:29:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 04:29:37,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:29:37,294 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:29:37,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-17 04:29:37,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-17 04:29:37,499 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:29:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:29:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 894264333, now seen corresponding path program 14 times [2023-02-17 04:29:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:29:37,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194265148] [2023-02-17 04:29:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:29:37,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:29:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:37,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:29:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194265148] [2023-02-17 04:29:37,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194265148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176944674] [2023-02-17 04:29:37,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:29:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:37,921 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:37,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-17 04:29:38,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:29:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:29:38,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 04:29:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:29:38,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:29:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 04:29:38,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176944674] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:29:38,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:29:38,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2023-02-17 04:29:38,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741554949] [2023-02-17 04:29:38,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:29:38,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 04:29:38,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:29:38,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 04:29:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 04:29:38,599 INFO L87 Difference]: Start difference. First operand 693 states and 874 transitions. Second operand has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 41 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:29:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:29:47,034 INFO L93 Difference]: Finished difference Result 2899 states and 3738 transitions. [2023-02-17 04:29:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-02-17 04:29:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 41 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-02-17 04:29:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:29:47,038 INFO L225 Difference]: With dead ends: 2899 [2023-02-17 04:29:47,039 INFO L226 Difference]: Without dead ends: 2450 [2023-02-17 04:29:47,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1019, Invalid=8881, Unknown=0, NotChecked=0, Total=9900 [2023-02-17 04:29:47,041 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 3124 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 3798 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3124 SdHoareTripleChecker+Valid, 5079 SdHoareTripleChecker+Invalid, 4195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 3798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:29:47,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3124 Valid, 5079 Invalid, 4195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 3798 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-17 04:29:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2023-02-17 04:29:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 661. [2023-02-17 04:29:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 637 states have (on average 1.2653061224489797) internal successors, (806), 640 states have internal predecessors, (806), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:29:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 836 transitions. [2023-02-17 04:29:47,801 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 836 transitions. Word has length 71 [2023-02-17 04:29:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:29:47,802 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 836 transitions. [2023-02-17 04:29:47,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 41 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 04:29:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 836 transitions. [2023-02-17 04:29:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 04:29:47,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:29:47,804 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:29:47,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-17 04:29:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:48,013 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:29:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:29:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1292302041, now seen corresponding path program 9 times [2023-02-17 04:29:48,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:29:48,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14639407] [2023-02-17 04:29:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:29:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:29:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:48,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 04:29:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14639407] [2023-02-17 04:29:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14639407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275506274] [2023-02-17 04:29:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:29:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:48,484 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:48,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-17 04:29:49,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 04:29:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:29:49,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-17 04:29:49,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:49,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-17 04:29:49,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:29:49,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 62 [2023-02-17 04:29:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 56 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 04:29:49,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:29:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 04:29:50,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275506274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:29:50,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:29:50,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 15] total 49 [2023-02-17 04:29:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681994957] [2023-02-17 04:29:50,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:29:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-17 04:29:50,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:29:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-17 04:29:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2048, Unknown=0, NotChecked=0, Total=2352 [2023-02-17 04:29:50,561 INFO L87 Difference]: Start difference. First operand 661 states and 836 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 04:29:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:29:53,745 INFO L93 Difference]: Finished difference Result 1090 states and 1396 transitions. [2023-02-17 04:29:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 04:29:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2023-02-17 04:29:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:29:53,748 INFO L225 Difference]: With dead ends: 1090 [2023-02-17 04:29:53,748 INFO L226 Difference]: Without dead ends: 1023 [2023-02-17 04:29:53,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=599, Invalid=3957, Unknown=0, NotChecked=0, Total=4556 [2023-02-17 04:29:53,749 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 538 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-17 04:29:53,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1522 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-17 04:29:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2023-02-17 04:29:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 695. [2023-02-17 04:29:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 671 states have (on average 1.2667660208643816) internal successors, (850), 674 states have internal predecessors, (850), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 04:29:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 880 transitions. [2023-02-17 04:29:54,457 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 880 transitions. Word has length 72 [2023-02-17 04:29:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:29:54,457 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 880 transitions. [2023-02-17 04:29:54,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 04:29:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 880 transitions. [2023-02-17 04:29:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-17 04:29:54,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:29:54,459 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:29:54,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-17 04:29:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:54,669 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:29:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:29:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1319842325, now seen corresponding path program 4 times [2023-02-17 04:29:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:29:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334465587] [2023-02-17 04:29:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:29:54,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:29:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 04:29:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:54,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 04:29:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:29:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 04:29:54,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:29:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334465587] [2023-02-17 04:29:54,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334465587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:29:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951138053] [2023-02-17 04:29:54,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:29:54,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:29:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:29:54,929 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 04:29:54,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-17 04:29:55,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:29:55,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:29:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 04:29:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:29:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 04:29:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates...