./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:23:02,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:23:03,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:23:03,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:23:03,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:23:03,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:23:03,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:23:03,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:23:03,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:23:03,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:23:03,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:23:03,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:23:03,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:23:03,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:23:03,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:23:03,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:23:03,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:23:03,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:23:03,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:23:03,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:23:03,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:23:03,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:23:03,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:23:03,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:23:03,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:23:03,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:23:03,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:23:03,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:23:03,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:23:03,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:23:03,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:23:03,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:23:03,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:23:03,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:23:03,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:23:03,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:23:03,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:23:03,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:23:03,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:23:03,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:23:03,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:23:03,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:23:03,087 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:23:03,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:23:03,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:23:03,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:23:03,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:23:03,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:23:03,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:23:03,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:23:03,090 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:23:03,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:23:03,092 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:23:03,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:23:03,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:23:03,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:23:03,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:23:03,092 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:23:03,093 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:23:03,093 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:23:03,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:23:03,093 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:23:03,093 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:23:03,093 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:23:03,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:23:03,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:23:03,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:23:03,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:23:03,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:23:03,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:23:03,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:23:03,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:23:03,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:23:03,096 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:23:03,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:23:03,096 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:23:03,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-02-16 03:23:03,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:23:03,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:23:03,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:23:03,404 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:23:03,404 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:23:03,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-16 03:23:04,689 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:23:04,866 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:23:04,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-16 03:23:04,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483c6394e/02863e7e72194d9197bb6fb40d8fb2db/FLAG327cee094 [2023-02-16 03:23:04,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483c6394e/02863e7e72194d9197bb6fb40d8fb2db [2023-02-16 03:23:04,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:23:04,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:23:04,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:23:04,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:23:04,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:23:04,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:23:04" (1/1) ... [2023-02-16 03:23:04,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18482379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:04, skipping insertion in model container [2023-02-16 03:23:04,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:23:04" (1/1) ... [2023-02-16 03:23:04,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:23:04,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:23:05,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:23:05,048 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:23:05,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:23:05,073 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:23:05,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05 WrapperNode [2023-02-16 03:23:05,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:23:05,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:23:05,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:23:05,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:23:05,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,109 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-16 03:23:05,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:23:05,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:23:05,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:23:05,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:23:05,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,148 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:23:05,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:23:05,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:23:05,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:23:05,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (1/1) ... [2023-02-16 03:23:05,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:23:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:05,190 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) [2023-02-16 03:23:05,215 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 [2023-02-16 03:23:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:23:05,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:23:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:23:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:23:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:23:05,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:23:05,302 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:23:05,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:23:05,527 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:23:05,533 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:23:05,548 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 03:23:05,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:23:05 BoogieIcfgContainer [2023-02-16 03:23:05,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:23:05,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:23:05,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:23:05,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:23:05,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:23:04" (1/3) ... [2023-02-16 03:23:05,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a11a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:23:05, skipping insertion in model container [2023-02-16 03:23:05,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:23:05" (2/3) ... [2023-02-16 03:23:05,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a11a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:23:05, skipping insertion in model container [2023-02-16 03:23:05,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:23:05" (3/3) ... [2023-02-16 03:23:05,559 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-02-16 03:23:05,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:23:05,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-16 03:23:05,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:23:05,668 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7a0db4f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:23:05,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-16 03:23:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-16 03:23:05,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:05,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-16 03:23:05,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2023-02-16 03:23:05,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:05,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333384409] [2023-02-16 03:23:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:05,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:05,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333384409] [2023-02-16 03:23:05,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333384409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:05,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:05,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:23:05,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242453666] [2023-02-16 03:23:05,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:05,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:23:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:23:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:23:06,016 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:06,059 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-02-16 03:23:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:23:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-16 03:23:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:06,068 INFO L225 Difference]: With dead ends: 59 [2023-02-16 03:23:06,068 INFO L226 Difference]: Without dead ends: 55 [2023-02-16 03:23:06,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:23:06,076 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:06,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-16 03:23:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2023-02-16 03:23:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-16 03:23:06,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-02-16 03:23:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:06,111 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-16 03:23:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-16 03:23:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:23:06,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:06,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:23:06,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:23:06,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2023-02-16 03:23:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839619384] [2023-02-16 03:23:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:06,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839619384] [2023-02-16 03:23:06,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839619384] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:06,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:06,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:23:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762458931] [2023-02-16 03:23:06,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:23:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:23:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:23:06,213 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:06,272 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-16 03:23:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:23:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-16 03:23:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:06,274 INFO L225 Difference]: With dead ends: 58 [2023-02-16 03:23:06,274 INFO L226 Difference]: Without dead ends: 58 [2023-02-16 03:23:06,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:23:06,276 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:06,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-16 03:23:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-02-16 03:23:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-16 03:23:06,282 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-16 03:23:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:06,282 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-16 03:23:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-16 03:23:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:23:06,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:06,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:23:06,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:23:06,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2023-02-16 03:23:06,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:06,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916917637] [2023-02-16 03:23:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:06,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916917637] [2023-02-16 03:23:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916917637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:06,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:06,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:23:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741223864] [2023-02-16 03:23:06,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:06,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:23:06,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:23:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:23:06,375 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:06,420 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-16 03:23:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:23:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-16 03:23:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:06,422 INFO L225 Difference]: With dead ends: 32 [2023-02-16 03:23:06,422 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 03:23:06,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:23:06,424 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:06,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 03:23:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-16 03:23:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-16 03:23:06,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-16 03:23:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:06,428 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-16 03:23:06,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-16 03:23:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:23:06,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:06,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:23:06,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:23:06,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2023-02-16 03:23:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199978379] [2023-02-16 03:23:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:06,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199978379] [2023-02-16 03:23:06,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199978379] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:06,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:06,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:23:06,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953968039] [2023-02-16 03:23:06,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:06,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:23:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:23:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:23:06,540 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:06,629 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-16 03:23:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:23:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-16 03:23:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:06,631 INFO L225 Difference]: With dead ends: 55 [2023-02-16 03:23:06,632 INFO L226 Difference]: Without dead ends: 55 [2023-02-16 03:23:06,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:23:06,636 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:06,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-16 03:23:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-02-16 03:23:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-16 03:23:06,641 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-16 03:23:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:06,642 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-16 03:23:06,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-16 03:23:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:23:06,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:06,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:06,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:23:06,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2023-02-16 03:23:06,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:06,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703467255] [2023-02-16 03:23:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:06,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:06,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703467255] [2023-02-16 03:23:06,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703467255] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:06,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:06,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:23:06,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567234546] [2023-02-16 03:23:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:06,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:23:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:23:06,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:23:06,707 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:06,721 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-02-16 03:23:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:23:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 03:23:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:06,723 INFO L225 Difference]: With dead ends: 31 [2023-02-16 03:23:06,724 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 03:23:06,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:23:06,726 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:06,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 03:23:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-16 03:23:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-16 03:23:06,733 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2023-02-16 03:23:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:06,733 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-16 03:23:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-16 03:23:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 03:23:06,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:06,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:23:06,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2023-02-16 03:23:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:06,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886015981] [2023-02-16 03:23:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:06,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886015981] [2023-02-16 03:23:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886015981] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:06,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:06,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:23:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9679170] [2023-02-16 03:23:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:23:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:23:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:23:06,812 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:06,855 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-02-16 03:23:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:23:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 03:23:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:06,857 INFO L225 Difference]: With dead ends: 56 [2023-02-16 03:23:06,857 INFO L226 Difference]: Without dead ends: 56 [2023-02-16 03:23:06,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:23:06,858 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:06,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-16 03:23:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2023-02-16 03:23:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-16 03:23:06,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 7 [2023-02-16 03:23:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:06,862 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-16 03:23:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-16 03:23:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:23:06,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:06,863 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:06,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:23:06,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2023-02-16 03:23:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:06,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595214609] [2023-02-16 03:23:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:06,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:06,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595214609] [2023-02-16 03:23:06,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595214609] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:06,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643143634] [2023-02-16 03:23:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:06,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:06,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:06,955 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) [2023-02-16 03:23:06,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:23:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 03:23:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:07,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:07,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643143634] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:07,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:07,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-16 03:23:07,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084692695] [2023-02-16 03:23:07,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:07,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:23:07,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:07,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:23:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:23:07,121 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:07,229 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2023-02-16 03:23:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:23:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:23:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:07,232 INFO L225 Difference]: With dead ends: 120 [2023-02-16 03:23:07,232 INFO L226 Difference]: Without dead ends: 120 [2023-02-16 03:23:07,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:23:07,233 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 127 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 148 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 [2023-02-16 03:23:07,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 148 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-16 03:23:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2023-02-16 03:23:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-02-16 03:23:07,240 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2023-02-16 03:23:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:07,240 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-02-16 03:23:07,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-02-16 03:23:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 03:23:07,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:07,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:07,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:07,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2023-02-16 03:23:07,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:07,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026219213] [2023-02-16 03:23:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:07,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:07,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026219213] [2023-02-16 03:23:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026219213] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786884517] [2023-02-16 03:23:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:07,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:07,581 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) [2023-02-16 03:23:07,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:23:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 03:23:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:07,704 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:23:07,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:23:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:07,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:07,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786884517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:07,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:07,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-02-16 03:23:07,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699322277] [2023-02-16 03:23:07,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:07,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:23:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:23:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:23:07,918 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:08,132 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2023-02-16 03:23:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:23:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 03:23:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:08,135 INFO L225 Difference]: With dead ends: 119 [2023-02-16 03:23:08,135 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 03:23:08,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:23:08,140 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:08,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 112 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 03:23:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 47. [2023-02-16 03:23:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-02-16 03:23:08,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2023-02-16 03:23:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:08,157 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-02-16 03:23:08,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-02-16 03:23:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 03:23:08,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:08,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:08,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:08,361 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 [2023-02-16 03:23:08,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2023-02-16 03:23:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:08,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580821262] [2023-02-16 03:23:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:08,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:08,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580821262] [2023-02-16 03:23:08,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580821262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:08,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250350240] [2023-02-16 03:23:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:08,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:08,424 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) [2023-02-16 03:23:08,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:23:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:23:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:08,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:08,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250350240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:08,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:08,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-16 03:23:08,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497093285] [2023-02-16 03:23:08,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:08,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:23:08,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:23:08,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:23:08,571 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:08,708 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-02-16 03:23:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:23:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 03:23:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:08,709 INFO L225 Difference]: With dead ends: 84 [2023-02-16 03:23:08,710 INFO L226 Difference]: Without dead ends: 84 [2023-02-16 03:23:08,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:23:08,712 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:08,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 45 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-16 03:23:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2023-02-16 03:23:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-16 03:23:08,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 12 [2023-02-16 03:23:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:08,720 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-16 03:23:08,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-16 03:23:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 03:23:08,721 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:08,722 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:08,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 03:23:08,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:08,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 2 times [2023-02-16 03:23:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:08,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496195600] [2023-02-16 03:23:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:08,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:09,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:09,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496195600] [2023-02-16 03:23:09,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496195600] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:09,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:23:09,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:23:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830155076] [2023-02-16 03:23:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:23:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:23:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:23:09,087 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:09,121 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-02-16 03:23:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:23:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-16 03:23:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:09,122 INFO L225 Difference]: With dead ends: 76 [2023-02-16 03:23:09,122 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 03:23:09,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:23:09,123 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:09,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 03:23:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-16 03:23:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-16 03:23:09,147 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2023-02-16 03:23:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:09,147 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-16 03:23:09,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-16 03:23:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 03:23:09,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:09,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:09,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-16 03:23:09,149 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2023-02-16 03:23:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:09,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491409929] [2023-02-16 03:23:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:09,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491409929] [2023-02-16 03:23:09,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491409929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940928029] [2023-02-16 03:23:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:09,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:09,226 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) [2023-02-16 03:23:09,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:23:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:23:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:09,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:09,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-16 03:23:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:09,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940928029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:09,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:09,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-16 03:23:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502961536] [2023-02-16 03:23:09,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:23:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:23:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 03:23:09,461 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:09,539 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-16 03:23:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:23:09,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-16 03:23:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:09,540 INFO L225 Difference]: With dead ends: 80 [2023-02-16 03:23:09,540 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 03:23:09,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:23:09,541 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:09,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 03:23:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-16 03:23:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-02-16 03:23:09,544 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2023-02-16 03:23:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:09,544 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-02-16 03:23:09,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-02-16 03:23:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:23:09,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:09,545 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-02-16 03:23:09,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:09,751 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 [2023-02-16 03:23:09,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:09,752 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2023-02-16 03:23:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:09,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769038672] [2023-02-16 03:23:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769038672] [2023-02-16 03:23:09,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769038672] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543017106] [2023-02-16 03:23:09,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:09,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:09,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:09,871 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) [2023-02-16 03:23:09,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:23:09,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:23:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 03:23:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:10,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:23:10,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543017106] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:10,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:23:10,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-16 03:23:10,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908476401] [2023-02-16 03:23:10,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:10,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:23:10,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:10,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:23:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:23:10,006 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:10,085 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-02-16 03:23:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:23:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-16 03:23:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:10,087 INFO L225 Difference]: With dead ends: 86 [2023-02-16 03:23:10,087 INFO L226 Difference]: Without dead ends: 86 [2023-02-16 03:23:10,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:23:10,088 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:10,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 58 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-16 03:23:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-02-16 03:23:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-02-16 03:23:10,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2023-02-16 03:23:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:10,091 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-02-16 03:23:10,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-02-16 03:23:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 03:23:10,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:10,092 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] [2023-02-16 03:23:10,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:10,298 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 [2023-02-16 03:23:10,299 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2023-02-16 03:23:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786094575] [2023-02-16 03:23:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:10,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:10,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786094575] [2023-02-16 03:23:10,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786094575] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985708147] [2023-02-16 03:23:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:10,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:10,362 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) [2023-02-16 03:23:10,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:23:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 03:23:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:10,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:23:10,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985708147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:10,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:10,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2023-02-16 03:23:10,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123279646] [2023-02-16 03:23:10,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:10,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 03:23:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 03:23:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:23:10,561 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:10,706 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2023-02-16 03:23:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:23:10,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-16 03:23:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:10,708 INFO L225 Difference]: With dead ends: 152 [2023-02-16 03:23:10,708 INFO L226 Difference]: Without dead ends: 152 [2023-02-16 03:23:10,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:23:10,709 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 137 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 86 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-16 03:23:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2023-02-16 03:23:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2023-02-16 03:23:10,713 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2023-02-16 03:23:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:10,713 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2023-02-16 03:23:10,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2023-02-16 03:23:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:23:10,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:10,714 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:10,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:10,914 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 [2023-02-16 03:23:10,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2023-02-16 03:23:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:10,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376685148] [2023-02-16 03:23:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:10,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376685148] [2023-02-16 03:23:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376685148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362174128] [2023-02-16 03:23:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:11,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:11,035 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) [2023-02-16 03:23:11,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:23:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:23:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:11,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:11,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362174128] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:11,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:11,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-02-16 03:23:11,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597332099] [2023-02-16 03:23:11,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:11,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:23:11,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:11,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:23:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:23:11,242 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:11,390 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-02-16 03:23:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:23:11,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-16 03:23:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:11,391 INFO L225 Difference]: With dead ends: 136 [2023-02-16 03:23:11,391 INFO L226 Difference]: Without dead ends: 136 [2023-02-16 03:23:11,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:23:11,392 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:11,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 68 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-16 03:23:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2023-02-16 03:23:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-02-16 03:23:11,397 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2023-02-16 03:23:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:11,397 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-02-16 03:23:11,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-02-16 03:23:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 03:23:11,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:11,401 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:11,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:11,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:11,608 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2023-02-16 03:23:11,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:11,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210075190] [2023-02-16 03:23:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 03:23:11,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:11,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210075190] [2023-02-16 03:23:11,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210075190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934941764] [2023-02-16 03:23:11,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:11,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:11,847 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) [2023-02-16 03:23:11,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:23:11,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:23:11,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:23:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:11,930 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:23:11,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:23:11,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:23:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 03:23:12,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 03:23:12,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934941764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:12,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:12,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-02-16 03:23:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651973424] [2023-02-16 03:23:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:23:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:23:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:23:12,266 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:12,384 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2023-02-16 03:23:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:23:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-16 03:23:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:12,385 INFO L225 Difference]: With dead ends: 165 [2023-02-16 03:23:12,385 INFO L226 Difference]: Without dead ends: 165 [2023-02-16 03:23:12,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:23:12,386 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:12,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 103 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-16 03:23:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-16 03:23:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 158 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-16 03:23:12,390 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2023-02-16 03:23:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:12,390 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-16 03:23:12,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-16 03:23:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-16 03:23:12,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:12,391 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:12,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:12,596 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,SelfDestructingSolverStorable14 [2023-02-16 03:23:12,597 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2023-02-16 03:23:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340841796] [2023-02-16 03:23:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:12,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 03:23:12,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340841796] [2023-02-16 03:23:12,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340841796] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548687984] [2023-02-16 03:23:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:12,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:12,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:12,738 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) [2023-02-16 03:23:12,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:23:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:23:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:23:12,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:23:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548687984] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:12,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:12,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-16 03:23:12,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342402527] [2023-02-16 03:23:12,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:12,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:23:12,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:12,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:23:12,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:23:12,974 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:13,183 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2023-02-16 03:23:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:23:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-16 03:23:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:13,185 INFO L225 Difference]: With dead ends: 159 [2023-02-16 03:23:13,185 INFO L226 Difference]: Without dead ends: 159 [2023-02-16 03:23:13,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2023-02-16 03:23:13,186 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:13,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 109 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-16 03:23:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-02-16 03:23:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 151 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2023-02-16 03:23:13,189 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2023-02-16 03:23:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:13,189 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2023-02-16 03:23:13,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2023-02-16 03:23:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-16 03:23:13,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:13,190 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-16 03:23:13,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:13,400 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,SelfDestructingSolverStorable15 [2023-02-16 03:23:13,400 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:13,401 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2023-02-16 03:23:13,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:13,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605860292] [2023-02-16 03:23:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 03:23:13,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:13,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605860292] [2023-02-16 03:23:13,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605860292] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538985753] [2023-02-16 03:23:13,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:13,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:13,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:13,572 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) [2023-02-16 03:23:13,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:23:13,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:23:13,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:23:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 03:23:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 03:23:13,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538985753] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:13,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:13,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-02-16 03:23:13,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120140608] [2023-02-16 03:23:13,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:13,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:23:13,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:23:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:23:13,931 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:14,263 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2023-02-16 03:23:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 03:23:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-02-16 03:23:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:14,264 INFO L225 Difference]: With dead ends: 167 [2023-02-16 03:23:14,264 INFO L226 Difference]: Without dead ends: 167 [2023-02-16 03:23:14,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 03:23:14,265 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 195 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:14,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 109 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:23:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-16 03:23:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2023-02-16 03:23:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-02-16 03:23:14,269 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 64 [2023-02-16 03:23:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:14,269 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-02-16 03:23:14,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-02-16 03:23:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-16 03:23:14,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:14,270 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-16 03:23:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:14,475 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,SelfDestructingSolverStorable16 [2023-02-16 03:23:14,476 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash -831517957, now seen corresponding path program 3 times [2023-02-16 03:23:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:14,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994468742] [2023-02-16 03:23:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:14,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 205 proven. 149 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-16 03:23:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994468742] [2023-02-16 03:23:14,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994468742] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:14,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322806807] [2023-02-16 03:23:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:23:14,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:14,657 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) [2023-02-16 03:23:14,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:23:14,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 03:23:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:23:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 191 proven. 38 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-16 03:23:14,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 191 proven. 38 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-16 03:23:14,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322806807] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:14,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:14,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-02-16 03:23:14,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222946769] [2023-02-16 03:23:14,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:14,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 03:23:14,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 03:23:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:23:14,919 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:16,695 INFO L93 Difference]: Finished difference Result 460 states and 509 transitions. [2023-02-16 03:23:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-16 03:23:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-02-16 03:23:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:16,698 INFO L225 Difference]: With dead ends: 460 [2023-02-16 03:23:16,698 INFO L226 Difference]: Without dead ends: 460 [2023-02-16 03:23:16,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=644, Invalid=2548, Unknown=0, NotChecked=0, Total=3192 [2023-02-16 03:23:16,699 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 964 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:16,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 211 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:23:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-02-16 03:23:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 208. [2023-02-16 03:23:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.187192118226601) internal successors, (241), 207 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 241 transitions. [2023-02-16 03:23:16,705 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 241 transitions. Word has length 86 [2023-02-16 03:23:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:16,705 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 241 transitions. [2023-02-16 03:23:16,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 241 transitions. [2023-02-16 03:23:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-16 03:23:16,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:16,706 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-16 03:23:16,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:16,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 03:23:16,907 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2023-02-16 03:23:16,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:16,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722369204] [2023-02-16 03:23:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 03:23:17,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722369204] [2023-02-16 03:23:17,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722369204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:17,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267630361] [2023-02-16 03:23:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:17,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:17,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:17,310 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) [2023-02-16 03:23:17,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:23:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:17,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 03:23:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:17,422 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:23:17,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:23:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 03:23:17,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 03:23:18,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267630361] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:18,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:18,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-16 03:23:18,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742742156] [2023-02-16 03:23:18,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:18,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:23:18,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:23:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:23:18,099 INFO L87 Difference]: Start difference. First operand 208 states and 241 transitions. Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:18,608 INFO L93 Difference]: Finished difference Result 408 states and 473 transitions. [2023-02-16 03:23:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 03:23:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-02-16 03:23:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:18,610 INFO L225 Difference]: With dead ends: 408 [2023-02-16 03:23:18,610 INFO L226 Difference]: Without dead ends: 408 [2023-02-16 03:23:18,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-16 03:23:18,611 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 545 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:18,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 203 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:23:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-16 03:23:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 210. [2023-02-16 03:23:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1365853658536584) internal successors, (233), 209 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 233 transitions. [2023-02-16 03:23:18,616 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 233 transitions. Word has length 92 [2023-02-16 03:23:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:18,617 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 233 transitions. [2023-02-16 03:23:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 233 transitions. [2023-02-16 03:23:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-16 03:23:18,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:18,619 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:18,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:18,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:18,819 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 448185099, now seen corresponding path program 2 times [2023-02-16 03:23:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763208689] [2023-02-16 03:23:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 95 proven. 334 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-16 03:23:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:19,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763208689] [2023-02-16 03:23:19,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763208689] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:19,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575384162] [2023-02-16 03:23:19,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:19,053 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) [2023-02-16 03:23:19,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:23:19,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:23:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 03:23:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:19,713 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (v_ArrVal_400 Int) (v_ArrVal_399 Int) (v_ArrVal_398 Int)) (and (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22|)) (= 0 (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22| v_ArrVal_400) |v_ULTIMATE.start_main_~#mask~0#1.base_17|)) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22| v_ArrVal_399) |v_ULTIMATE.start_main_~#mask~0#1.base_17| v_ArrVal_398) |v_ULTIMATE.start_main_~#b~0#1.base_22| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)))) is different from true [2023-02-16 03:23:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-02-16 03:23:19,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:23:19,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575384162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:19,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:23:19,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2023-02-16 03:23:19,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013300665] [2023-02-16 03:23:19,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:19,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:23:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:23:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=99, Unknown=1, NotChecked=20, Total=156 [2023-02-16 03:23:19,717 INFO L87 Difference]: Start difference. First operand 210 states and 233 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:19,739 INFO L93 Difference]: Finished difference Result 211 states and 233 transitions. [2023-02-16 03:23:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:23:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2023-02-16 03:23:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:19,741 INFO L225 Difference]: With dead ends: 211 [2023-02-16 03:23:19,741 INFO L226 Difference]: Without dead ends: 209 [2023-02-16 03:23:19,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=99, Unknown=1, NotChecked=20, Total=156 [2023-02-16 03:23:19,742 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:19,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2023-02-16 03:23:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-02-16 03:23:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-02-16 03:23:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 208 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2023-02-16 03:23:19,746 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 102 [2023-02-16 03:23:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:19,746 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2023-02-16 03:23:19,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2023-02-16 03:23:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-16 03:23:19,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:19,747 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:19,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:19,959 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,SelfDestructingSolverStorable19 [2023-02-16 03:23:19,960 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 1 times [2023-02-16 03:23:19,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:19,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552398302] [2023-02-16 03:23:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:19,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 95 proven. 334 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-16 03:23:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552398302] [2023-02-16 03:23:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552398302] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116478930] [2023-02-16 03:23:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:20,257 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) [2023-02-16 03:23:20,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:23:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:20,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 03:23:20,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-16 03:23:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-16 03:23:20,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116478930] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:20,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:20,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-02-16 03:23:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274802274] [2023-02-16 03:23:20,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:23:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:23:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:23:20,696 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:21,041 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2023-02-16 03:23:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 03:23:21,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-02-16 03:23:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:21,042 INFO L225 Difference]: With dead ends: 211 [2023-02-16 03:23:21,042 INFO L226 Difference]: Without dead ends: 211 [2023-02-16 03:23:21,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:23:21,043 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:21,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 89 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:23:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-16 03:23:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-02-16 03:23:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.107843137254902) internal successors, (226), 208 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2023-02-16 03:23:21,047 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2023-02-16 03:23:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:21,047 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2023-02-16 03:23:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2023-02-16 03:23:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-16 03:23:21,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:21,048 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:21,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:21,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:21,256 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 2 times [2023-02-16 03:23:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:21,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174834612] [2023-02-16 03:23:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:21,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-16 03:23:21,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:21,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174834612] [2023-02-16 03:23:21,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174834612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:21,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397017478] [2023-02-16 03:23:21,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:21,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:21,454 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) [2023-02-16 03:23:21,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:23:21,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:23:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:23:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 40 proven. 283 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-16 03:23:21,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:22,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-02-16 03:23:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 40 proven. 283 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-16 03:23:22,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397017478] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:22,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:22,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-02-16 03:23:22,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596541507] [2023-02-16 03:23:22,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:22,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:23:22,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:23:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:23:22,223 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:22,492 INFO L93 Difference]: Finished difference Result 285 states and 304 transitions. [2023-02-16 03:23:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:23:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-02-16 03:23:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:22,494 INFO L225 Difference]: With dead ends: 285 [2023-02-16 03:23:22,494 INFO L226 Difference]: Without dead ends: 285 [2023-02-16 03:23:22,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-02-16 03:23:22,494 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 250 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:22,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 222 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:23:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-16 03:23:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 216. [2023-02-16 03:23:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.1042654028436019) internal successors, (233), 215 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 233 transitions. [2023-02-16 03:23:22,508 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 233 transitions. Word has length 108 [2023-02-16 03:23:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:22,508 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 233 transitions. [2023-02-16 03:23:22,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 233 transitions. [2023-02-16 03:23:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-16 03:23:22,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:22,510 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-16 03:23:22,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:22,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:22,716 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2023-02-16 03:23:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:22,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733631707] [2023-02-16 03:23:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 208 proven. 710 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-16 03:23:23,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733631707] [2023-02-16 03:23:23,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733631707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627529874] [2023-02-16 03:23:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:23:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:23,070 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) [2023-02-16 03:23:23,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:23:23,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:23:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:23,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 03:23:23,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-16 03:23:23,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-16 03:23:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627529874] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:23,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:23,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-16 03:23:23,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370555506] [2023-02-16 03:23:23,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-16 03:23:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-16 03:23:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 03:23:23,833 INFO L87 Difference]: Start difference. First operand 216 states and 233 transitions. Second operand has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:25,170 INFO L93 Difference]: Finished difference Result 415 states and 441 transitions. [2023-02-16 03:23:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-16 03:23:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-02-16 03:23:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:25,173 INFO L225 Difference]: With dead ends: 415 [2023-02-16 03:23:25,173 INFO L226 Difference]: Without dead ends: 415 [2023-02-16 03:23:25,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 215 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2896, Invalid=7816, Unknown=0, NotChecked=0, Total=10712 [2023-02-16 03:23:25,177 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 599 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:25,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 134 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:23:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-02-16 03:23:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 381. [2023-02-16 03:23:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.0904255319148937) internal successors, (410), 380 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 410 transitions. [2023-02-16 03:23:25,184 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 410 transitions. Word has length 121 [2023-02-16 03:23:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:25,185 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 410 transitions. [2023-02-16 03:23:25,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 410 transitions. [2023-02-16 03:23:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-16 03:23:25,186 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:25,186 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2023-02-16 03:23:25,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:25,386 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,SelfDestructingSolverStorable22 [2023-02-16 03:23:25,387 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1920952833, now seen corresponding path program 3 times [2023-02-16 03:23:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:25,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739430067] [2023-02-16 03:23:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:25,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 295 proven. 603 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-16 03:23:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739430067] [2023-02-16 03:23:25,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739430067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482876460] [2023-02-16 03:23:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:23:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:25,673 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) [2023-02-16 03:23:25,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 03:23:25,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:23:25,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:25,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 03:23:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:25,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:23:25,791 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:23:25,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:23:25,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:23:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 10 proven. 413 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-02-16 03:23:26,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-02-16 03:23:27,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482876460] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:27,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:27,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-02-16 03:23:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831304002] [2023-02-16 03:23:27,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:23:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:23:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:23:27,373 INFO L87 Difference]: Start difference. First operand 381 states and 410 transitions. Second operand has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:30,226 INFO L93 Difference]: Finished difference Result 380 states and 401 transitions. [2023-02-16 03:23:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-16 03:23:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-02-16 03:23:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:30,228 INFO L225 Difference]: With dead ends: 380 [2023-02-16 03:23:30,228 INFO L226 Difference]: Without dead ends: 380 [2023-02-16 03:23:30,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1790, Invalid=4852, Unknown=0, NotChecked=0, Total=6642 [2023-02-16 03:23:30,230 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 242 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:30,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 97 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:23:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-16 03:23:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2023-02-16 03:23:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 376 states have (on average 1.0664893617021276) internal successors, (401), 379 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 401 transitions. [2023-02-16 03:23:30,236 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 401 transitions. Word has length 130 [2023-02-16 03:23:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:30,237 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 401 transitions. [2023-02-16 03:23:30,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 401 transitions. [2023-02-16 03:23:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-16 03:23:30,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:30,238 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 03:23:30,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:30,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:30,439 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1097568675, now seen corresponding path program 3 times [2023-02-16 03:23:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:30,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216597464] [2023-02-16 03:23:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-02-16 03:23:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216597464] [2023-02-16 03:23:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216597464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165281032] [2023-02-16 03:23:30,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:23:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:30,680 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) [2023-02-16 03:23:30,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 03:23:30,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:23:30,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 03:23:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:23:30,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-16 03:23:30,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 03:23:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2023-02-16 03:23:31,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:23:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165281032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:23:31,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:23:31,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-02-16 03:23:31,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608954538] [2023-02-16 03:23:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:23:31,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:23:31,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:23:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:23:31,256 INFO L87 Difference]: Start difference. First operand 380 states and 401 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:31,292 INFO L93 Difference]: Finished difference Result 379 states and 398 transitions. [2023-02-16 03:23:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:23:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2023-02-16 03:23:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:31,294 INFO L225 Difference]: With dead ends: 379 [2023-02-16 03:23:31,294 INFO L226 Difference]: Without dead ends: 379 [2023-02-16 03:23:31,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:23:31,295 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:31,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 35 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:23:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-16 03:23:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-02-16 03:23:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 376 states have (on average 1.0585106382978724) internal successors, (398), 378 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 398 transitions. [2023-02-16 03:23:31,301 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 398 transitions. Word has length 149 [2023-02-16 03:23:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:31,301 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 398 transitions. [2023-02-16 03:23:31,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 398 transitions. [2023-02-16 03:23:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-16 03:23:31,302 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:31,303 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:23:31,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:31,503 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1797778537, now seen corresponding path program 1 times [2023-02-16 03:23:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:31,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475135588] [2023-02-16 03:23:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-02-16 03:23:31,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475135588] [2023-02-16 03:23:31,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475135588] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357965603] [2023-02-16 03:23:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:31,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:31,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:31,761 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) [2023-02-16 03:23:31,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 03:23:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 03:23:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 1066 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-16 03:23:32,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 21 proven. 990 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-02-16 03:23:32,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357965603] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:32,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:32,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 19, 14] total 32 [2023-02-16 03:23:32,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84750670] [2023-02-16 03:23:32,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:32,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 03:23:32,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 03:23:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2023-02-16 03:23:32,855 INFO L87 Difference]: Start difference. First operand 379 states and 398 transitions. Second operand has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:33,787 INFO L93 Difference]: Finished difference Result 596 states and 627 transitions. [2023-02-16 03:23:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 03:23:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2023-02-16 03:23:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:33,790 INFO L225 Difference]: With dead ends: 596 [2023-02-16 03:23:33,790 INFO L226 Difference]: Without dead ends: 596 [2023-02-16 03:23:33,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=908, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 03:23:33,791 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 398 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:33,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 421 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:23:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-02-16 03:23:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2023-02-16 03:23:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0681431005110733) internal successors, (627), 589 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 627 transitions. [2023-02-16 03:23:33,799 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 627 transitions. Word has length 162 [2023-02-16 03:23:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:33,800 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 627 transitions. [2023-02-16 03:23:33,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 627 transitions. [2023-02-16 03:23:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-02-16 03:23:33,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:33,803 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-16 03:23:33,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:34,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:34,009 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2023-02-16 03:23:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:34,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877546839] [2023-02-16 03:23:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:34,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 3902 proven. 971 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2023-02-16 03:23:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877546839] [2023-02-16 03:23:34,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877546839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:34,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446721754] [2023-02-16 03:23:34,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 03:23:34,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:34,541 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) [2023-02-16 03:23:34,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 03:23:35,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-16 03:23:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 03:23:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4038 proven. 852 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-16 03:23:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4223 proven. 667 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-16 03:23:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446721754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:35,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 29 [2023-02-16 03:23:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056381737] [2023-02-16 03:23:35,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:23:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:23:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-02-16 03:23:35,635 INFO L87 Difference]: Start difference. First operand 590 states and 627 transitions. Second operand has 29 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:36,604 INFO L93 Difference]: Finished difference Result 590 states and 620 transitions. [2023-02-16 03:23:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-16 03:23:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 301 [2023-02-16 03:23:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:36,607 INFO L225 Difference]: With dead ends: 590 [2023-02-16 03:23:36,607 INFO L226 Difference]: Without dead ends: 590 [2023-02-16 03:23:36,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 580 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=877, Invalid=3029, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 03:23:36,609 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:36,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 104 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:23:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-16 03:23:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-02-16 03:23:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0562180579216354) internal successors, (620), 589 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 620 transitions. [2023-02-16 03:23:36,617 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 620 transitions. Word has length 301 [2023-02-16 03:23:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:36,618 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 620 transitions. [2023-02-16 03:23:36,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 620 transitions. [2023-02-16 03:23:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-16 03:23:36,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:36,621 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-16 03:23:36,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:36,828 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,SelfDestructingSolverStorable26 [2023-02-16 03:23:36,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2023-02-16 03:23:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:36,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940120676] [2023-02-16 03:23:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4599 proven. 1453 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2023-02-16 03:23:37,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940120676] [2023-02-16 03:23:37,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940120676] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135334009] [2023-02-16 03:23:37,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 03:23:37,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:37,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:37,426 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) [2023-02-16 03:23:37,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 03:23:38,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-02-16 03:23:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:23:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-16 03:23:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-16 03:23:39,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135334009] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:39,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:39,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 29 [2023-02-16 03:23:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765802258] [2023-02-16 03:23:39,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:23:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:23:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-02-16 03:23:39,741 INFO L87 Difference]: Start difference. First operand 590 states and 620 transitions. Second operand has 29 states, 29 states have (on average 7.068965517241379) internal successors, (205), 29 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:40,622 INFO L93 Difference]: Finished difference Result 590 states and 609 transitions. [2023-02-16 03:23:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-16 03:23:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.068965517241379) internal successors, (205), 29 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2023-02-16 03:23:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:40,624 INFO L225 Difference]: With dead ends: 590 [2023-02-16 03:23:40,624 INFO L226 Difference]: Without dead ends: 590 [2023-02-16 03:23:40,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 607 SyntacticMatches, 13 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1433, Invalid=3823, Unknown=0, NotChecked=0, Total=5256 [2023-02-16 03:23:40,626 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:40,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 217 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:23:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-16 03:23:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-02-16 03:23:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0374787052810903) internal successors, (609), 589 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 609 transitions. [2023-02-16 03:23:40,634 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 609 transitions. Word has length 316 [2023-02-16 03:23:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:40,635 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 609 transitions. [2023-02-16 03:23:40,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.068965517241379) internal successors, (205), 29 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 609 transitions. [2023-02-16 03:23:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-02-16 03:23:40,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:40,638 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-16 03:23:40,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:40,847 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,SelfDestructingSolverStorable27 [2023-02-16 03:23:40,848 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2023-02-16 03:23:40,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:40,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393813473] [2023-02-16 03:23:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:40,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 243 proven. 7020 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-16 03:23:41,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393813473] [2023-02-16 03:23:41,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393813473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:41,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512709563] [2023-02-16 03:23:41,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 03:23:41,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:41,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:41,665 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) [2023-02-16 03:23:41,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 03:23:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 03:23:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-16 03:23:42,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-16 03:23:42,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512709563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:42,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:42,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2023-02-16 03:23:42,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106530876] [2023-02-16 03:23:42,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:42,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 03:23:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 03:23:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 03:23:42,931 INFO L87 Difference]: Start difference. First operand 590 states and 609 transitions. Second operand has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:44,361 INFO L93 Difference]: Finished difference Result 574 states and 586 transitions. [2023-02-16 03:23:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-16 03:23:44,361 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2023-02-16 03:23:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:44,363 INFO L225 Difference]: With dead ends: 574 [2023-02-16 03:23:44,363 INFO L226 Difference]: Without dead ends: 574 [2023-02-16 03:23:44,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 630 SyntacticMatches, 19 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4803 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2797, Invalid=10543, Unknown=0, NotChecked=0, Total=13340 [2023-02-16 03:23:44,367 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 608 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:44,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 166 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:23:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-16 03:23:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 568. [2023-02-16 03:23:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.0265486725663717) internal successors, (580), 567 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 580 transitions. [2023-02-16 03:23:44,374 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 580 transitions. Word has length 331 [2023-02-16 03:23:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:44,375 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 580 transitions. [2023-02-16 03:23:44,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 580 transitions. [2023-02-16 03:23:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-02-16 03:23:44,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:44,377 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-16 03:23:44,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-16 03:23:44,585 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 223876524, now seen corresponding path program 8 times [2023-02-16 03:23:44,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:44,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800598105] [2023-02-16 03:23:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7020 proven. 2819 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-16 03:23:45,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800598105] [2023-02-16 03:23:45,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800598105] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148850857] [2023-02-16 03:23:45,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:45,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:45,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:45,529 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) [2023-02-16 03:23:45,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 03:23:45,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:23:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 03:23:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7546 proven. 2293 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-16 03:23:46,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7546 proven. 2293 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-16 03:23:46,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148850857] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:46,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:46,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 33 [2023-02-16 03:23:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458210841] [2023-02-16 03:23:46,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:23:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:23:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:23:46,749 INFO L87 Difference]: Start difference. First operand 568 states and 580 transitions. Second operand has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:47,911 INFO L93 Difference]: Finished difference Result 574 states and 582 transitions. [2023-02-16 03:23:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-16 03:23:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2023-02-16 03:23:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:47,914 INFO L225 Difference]: With dead ends: 574 [2023-02-16 03:23:47,914 INFO L226 Difference]: Without dead ends: 574 [2023-02-16 03:23:47,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 737 SyntacticMatches, 17 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2014, Invalid=5642, Unknown=0, NotChecked=0, Total=7656 [2023-02-16 03:23:47,915 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 108 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:47,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 251 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:23:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-16 03:23:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 568. [2023-02-16 03:23:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.0194690265486726) internal successors, (576), 567 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 576 transitions. [2023-02-16 03:23:47,928 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 576 transitions. Word has length 383 [2023-02-16 03:23:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:47,928 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 576 transitions. [2023-02-16 03:23:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 576 transitions. [2023-02-16 03:23:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-02-16 03:23:47,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:47,931 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-16 03:23:47,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-16 03:23:48,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:48,137 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 9 times [2023-02-16 03:23:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:48,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549183709] [2023-02-16 03:23:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-16 03:23:48,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:48,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549183709] [2023-02-16 03:23:48,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549183709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:48,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768885511] [2023-02-16 03:23:48,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:23:48,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:48,753 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) [2023-02-16 03:23:48,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-16 03:23:49,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-16 03:23:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 03:23:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-16 03:23:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-16 03:23:49,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768885511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:49,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:49,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-02-16 03:23:49,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971632358] [2023-02-16 03:23:49,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:49,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-16 03:23:49,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-16 03:23:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-16 03:23:49,499 INFO L87 Difference]: Start difference. First operand 568 states and 576 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:52,871 INFO L93 Difference]: Finished difference Result 1608 states and 1686 transitions. [2023-02-16 03:23:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 03:23:52,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2023-02-16 03:23:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:52,876 INFO L225 Difference]: With dead ends: 1608 [2023-02-16 03:23:52,876 INFO L226 Difference]: Without dead ends: 1608 [2023-02-16 03:23:52,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 771 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 03:23:52,877 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1192 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:52,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 703 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:23:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2023-02-16 03:23:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 745. [2023-02-16 03:23:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 742 states have (on average 1.1078167115902966) internal successors, (822), 744 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 822 transitions. [2023-02-16 03:23:52,891 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 822 transitions. Word has length 388 [2023-02-16 03:23:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:52,892 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 822 transitions. [2023-02-16 03:23:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 822 transitions. [2023-02-16 03:23:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-02-16 03:23:52,894 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:52,894 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-16 03:23:52,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:53,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:53,101 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2023-02-16 03:23:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:53,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747970459] [2023-02-16 03:23:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:23:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-16 03:23:54,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:23:54,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747970459] [2023-02-16 03:23:54,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747970459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:23:54,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261727286] [2023-02-16 03:23:54,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:23:54,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:23:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:23:54,342 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) [2023-02-16 03:23:54,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-16 03:23:54,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:23:54,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:23:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-16 03:23:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:23:54,669 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:23:54,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:23:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-16 03:23:55,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:23:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-16 03:23:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261727286] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:23:56,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:23:56,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-02-16 03:23:56,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291135515] [2023-02-16 03:23:56,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:23:56,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 03:23:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:23:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 03:23:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 03:23:56,954 INFO L87 Difference]: Start difference. First operand 745 states and 822 transitions. Second operand has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:23:58,543 INFO L93 Difference]: Finished difference Result 1600 states and 1656 transitions. [2023-02-16 03:23:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-16 03:23:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2023-02-16 03:23:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:23:58,546 INFO L225 Difference]: With dead ends: 1600 [2023-02-16 03:23:58,547 INFO L226 Difference]: Without dead ends: 1600 [2023-02-16 03:23:58,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 754 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1288, Invalid=3268, Unknown=0, NotChecked=0, Total=4556 [2023-02-16 03:23:58,548 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1278 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:23:58,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 739 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:23:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2023-02-16 03:23:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 748. [2023-02-16 03:23:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 745 states have (on average 1.0630872483221476) internal successors, (792), 747 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 792 transitions. [2023-02-16 03:23:58,562 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 792 transitions. Word has length 389 [2023-02-16 03:23:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:23:58,562 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 792 transitions. [2023-02-16 03:23:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:23:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 792 transitions. [2023-02-16 03:23:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-02-16 03:23:58,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:23:58,565 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-16 03:23:58,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-16 03:23:58,772 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,SelfDestructingSolverStorable31 [2023-02-16 03:23:58,772 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:23:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:23:58,773 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 10 times [2023-02-16 03:23:58,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:23:58,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507890719] [2023-02-16 03:23:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:23:58,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:23:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:24:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1147 proven. 13330 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-16 03:24:00,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:24:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507890719] [2023-02-16 03:24:00,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507890719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:24:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793407370] [2023-02-16 03:24:00,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:24:00,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:24:00,405 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) [2023-02-16 03:24:00,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-16 03:24:01,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:24:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:24:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 03:24:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:24:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1253 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-16 03:24:02,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:24:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1253 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-16 03:24:03,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793407370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:24:03,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:24:03,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 81 [2023-02-16 03:24:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116448846] [2023-02-16 03:24:03,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:24:03,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-16 03:24:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:24:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-16 03:24:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1725, Invalid=4755, Unknown=0, NotChecked=0, Total=6480 [2023-02-16 03:24:03,345 INFO L87 Difference]: Start difference. First operand 748 states and 792 transitions. Second operand has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:24:11,311 INFO L93 Difference]: Finished difference Result 1561 states and 1666 transitions. [2023-02-16 03:24:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2023-02-16 03:24:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2023-02-16 03:24:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:24:11,315 INFO L225 Difference]: With dead ends: 1561 [2023-02-16 03:24:11,315 INFO L226 Difference]: Without dead ends: 1561 [2023-02-16 03:24:11,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 839 SyntacticMatches, 11 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70107 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=37124, Invalid=94282, Unknown=0, NotChecked=0, Total=131406 [2023-02-16 03:24:11,326 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1494 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:24:11,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 254 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 03:24:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-02-16 03:24:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1511. [2023-02-16 03:24:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1508 states have (on average 1.0669761273209548) internal successors, (1609), 1510 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1609 transitions. [2023-02-16 03:24:11,346 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1609 transitions. Word has length 448 [2023-02-16 03:24:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:24:11,346 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 1609 transitions. [2023-02-16 03:24:11,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1609 transitions. [2023-02-16 03:24:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-02-16 03:24:11,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:24:11,350 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:24:11,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-16 03:24:11,559 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,SelfDestructingSolverStorable32 [2023-02-16 03:24:11,559 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:24:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:24:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1728592905, now seen corresponding path program 2 times [2023-02-16 03:24:11,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:24:11,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833785969] [2023-02-16 03:24:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:24:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:24:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:24:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19188 backedges. 13291 proven. 3733 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2023-02-16 03:24:12,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:24:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833785969] [2023-02-16 03:24:12,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833785969] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:24:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698340069] [2023-02-16 03:24:12,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:24:12,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:12,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:24:12,775 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) [2023-02-16 03:24:12,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-16 03:24:12,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-16 03:24:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:24:12,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:24:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:24:15,278 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_28| Int) (v_ArrVal_2168 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| 1))) (and (= 0 (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_28|)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|)) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2168) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0))))) is different from true [2023-02-16 03:24:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19188 trivial. 0 not checked. [2023-02-16 03:24:15,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:24:15,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698340069] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:24:15,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:24:15,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [23] total 25 [2023-02-16 03:24:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406777611] [2023-02-16 03:24:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:24:15,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:24:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:24:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:24:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=417, Unknown=1, NotChecked=44, Total=600 [2023-02-16 03:24:15,283 INFO L87 Difference]: Start difference. First operand 1511 states and 1609 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:24:15,291 INFO L93 Difference]: Finished difference Result 1510 states and 1608 transitions. [2023-02-16 03:24:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:24:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 559 [2023-02-16 03:24:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:24:15,295 INFO L225 Difference]: With dead ends: 1510 [2023-02-16 03:24:15,295 INFO L226 Difference]: Without dead ends: 1458 [2023-02-16 03:24:15,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=417, Unknown=1, NotChecked=44, Total=600 [2023-02-16 03:24:15,296 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:24:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2023-02-16 03:24:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-02-16 03:24:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2023-02-16 03:24:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.0625) internal successors, (1547), 1457 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1547 transitions. [2023-02-16 03:24:15,312 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1547 transitions. Word has length 559 [2023-02-16 03:24:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:24:15,312 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1547 transitions. [2023-02-16 03:24:15,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1547 transitions. [2023-02-16 03:24:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2023-02-16 03:24:15,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:24:15,322 INFO L195 NwaCegarLoop]: trace histogram [187, 186, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-16 03:24:15,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-16 03:24:15,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:15,528 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:24:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:24:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1348735048, now seen corresponding path program 11 times [2023-02-16 03:24:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:24:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297791060] [2023-02-16 03:24:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:24:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:24:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:24:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 48121 proven. 3733 refuted. 0 times theorem prover too weak. 39633 trivial. 0 not checked. [2023-02-16 03:24:17,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:24:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297791060] [2023-02-16 03:24:17,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297791060] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:24:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690892626] [2023-02-16 03:24:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 03:24:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:24:17,751 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) [2023-02-16 03:24:17,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-16 03:24:25,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-16 03:24:25,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:24:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 03:24:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:24:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 48255 proven. 3482 refuted. 0 times theorem prover too weak. 39750 trivial. 0 not checked. [2023-02-16 03:24:26,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:24:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 49141 proven. 2596 refuted. 0 times theorem prover too weak. 39750 trivial. 0 not checked. [2023-02-16 03:24:26,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690892626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:24:26,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:24:26,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 45 [2023-02-16 03:24:26,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049037132] [2023-02-16 03:24:26,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:24:26,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-16 03:24:26,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:24:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-16 03:24:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:24:26,663 INFO L87 Difference]: Start difference. First operand 1458 states and 1547 transitions. Second operand has 45 states, 45 states have (on average 6.444444444444445) internal successors, (290), 45 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:24:28,969 INFO L93 Difference]: Finished difference Result 1458 states and 1535 transitions. [2023-02-16 03:24:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-16 03:24:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.444444444444445) internal successors, (290), 45 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1075 [2023-02-16 03:24:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:24:28,972 INFO L225 Difference]: With dead ends: 1458 [2023-02-16 03:24:28,973 INFO L226 Difference]: Without dead ends: 1458 [2023-02-16 03:24:28,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2251 GetRequests, 2113 SyntacticMatches, 16 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3298, Invalid=11954, Unknown=0, NotChecked=0, Total=15252 [2023-02-16 03:24:28,975 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 146 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:24:28,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 192 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 03:24:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-02-16 03:24:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2023-02-16 03:24:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.0542582417582418) internal successors, (1535), 1457 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1535 transitions. [2023-02-16 03:24:28,990 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1535 transitions. Word has length 1075 [2023-02-16 03:24:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:24:28,990 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1535 transitions. [2023-02-16 03:24:28,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.444444444444445) internal successors, (290), 45 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1535 transitions. [2023-02-16 03:24:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2023-02-16 03:24:29,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:24:29,001 INFO L195 NwaCegarLoop]: trace histogram [198, 197, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-16 03:24:29,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-16 03:24:29,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:29,209 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:24:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:24:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 502793343, now seen corresponding path program 12 times [2023-02-16 03:24:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:24:29,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781906605] [2023-02-16 03:24:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:24:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:24:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:24:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 58302 proven. 4821 refuted. 0 times theorem prover too weak. 39111 trivial. 0 not checked. [2023-02-16 03:24:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:24:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781906605] [2023-02-16 03:24:31,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781906605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:24:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732301757] [2023-02-16 03:24:31,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 03:24:31,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:31,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:24:31,201 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) [2023-02-16 03:24:31,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-16 03:24:32,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-02-16 03:24:32,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:24:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:24:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:24:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 9530 proven. 20532 refuted. 0 times theorem prover too weak. 72172 trivial. 0 not checked. [2023-02-16 03:24:33,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:24:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 0 proven. 30062 refuted. 0 times theorem prover too weak. 72172 trivial. 0 not checked. [2023-02-16 03:24:36,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732301757] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:24:36,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:24:36,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 65 [2023-02-16 03:24:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725092030] [2023-02-16 03:24:36,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:24:36,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-16 03:24:36,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:24:36,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-16 03:24:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=3475, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 03:24:36,601 INFO L87 Difference]: Start difference. First operand 1458 states and 1535 transitions. Second operand has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:24:55,466 INFO L93 Difference]: Finished difference Result 1663 states and 1744 transitions. [2023-02-16 03:24:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2023-02-16 03:24:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1130 [2023-02-16 03:24:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:24:55,469 INFO L225 Difference]: With dead ends: 1663 [2023-02-16 03:24:55,470 INFO L226 Difference]: Without dead ends: 1663 [2023-02-16 03:24:55,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2542 GetRequests, 2220 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38532 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=20521, Invalid=84131, Unknown=0, NotChecked=0, Total=104652 [2023-02-16 03:24:55,478 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1860 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:24:55,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1860 Valid, 209 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2438 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-16 03:24:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-02-16 03:24:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1593. [2023-02-16 03:24:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1591 states have (on average 1.0546825895663106) internal successors, (1678), 1592 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1678 transitions. [2023-02-16 03:24:55,493 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1678 transitions. Word has length 1130 [2023-02-16 03:24:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:24:55,494 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 1678 transitions. [2023-02-16 03:24:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:24:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1678 transitions. [2023-02-16 03:24:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2023-02-16 03:24:55,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:24:55,505 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 207, 207, 207, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-16 03:24:55,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-16 03:24:55,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:55,713 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:24:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:24:55,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2030221151, now seen corresponding path program 3 times [2023-02-16 03:24:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:24:55,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207952840] [2023-02-16 03:24:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:24:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:24:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:24:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 69066 proven. 6098 refuted. 0 times theorem prover too weak. 37572 trivial. 0 not checked. [2023-02-16 03:24:58,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:24:58,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207952840] [2023-02-16 03:24:58,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207952840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:24:58,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744081316] [2023-02-16 03:24:58,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:24:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:24:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:24:58,014 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) [2023-02-16 03:24:58,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-16 03:24:58,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 03:24:58,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:24:58,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:24:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:24:58,340 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:24:58,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:25:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 108 proven. 21365 refuted. 0 times theorem prover too weak. 91263 trivial. 0 not checked. [2023-02-16 03:25:01,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:25:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 0 proven. 21473 refuted. 0 times theorem prover too weak. 91263 trivial. 0 not checked. [2023-02-16 03:25:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744081316] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:25:05,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:25:05,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 37 [2023-02-16 03:25:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008409559] [2023-02-16 03:25:05,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:25:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 03:25:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:25:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 03:25:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 03:25:05,838 INFO L87 Difference]: Start difference. First operand 1593 states and 1678 transitions. Second operand has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:25:11,780 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2023-02-16 03:25:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-02-16 03:25:11,781 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1181 [2023-02-16 03:25:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:25:11,785 INFO L225 Difference]: With dead ends: 1592 [2023-02-16 03:25:11,785 INFO L226 Difference]: Without dead ends: 1592 [2023-02-16 03:25:11,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2567 GetRequests, 2352 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14408 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12263, Invalid=34609, Unknown=0, NotChecked=0, Total=46872 [2023-02-16 03:25:11,789 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:25:11,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 279 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 03:25:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-16 03:25:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-16 03:25:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2023-02-16 03:25:11,804 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1181 [2023-02-16 03:25:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:25:11,804 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2023-02-16 03:25:11,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2023-02-16 03:25:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1353 [2023-02-16 03:25:11,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:25:11,818 INFO L195 NwaCegarLoop]: trace histogram [241, 240, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-16 03:25:11,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-16 03:25:12,024 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,SelfDestructingSolverStorable36 [2023-02-16 03:25:12,025 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:25:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:25:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash 496562611, now seen corresponding path program 13 times [2023-02-16 03:25:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:25:12,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311391701] [2023-02-16 03:25:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:25:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:25:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:25:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 92741 proven. 7579 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-16 03:25:14,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:25:14,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311391701] [2023-02-16 03:25:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311391701] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:25:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262628486] [2023-02-16 03:25:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 03:25:14,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:25:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:25:14,502 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) [2023-02-16 03:25:14,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-16 03:25:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:25:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 3866 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 03:25:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:25:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93809 proven. 6511 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-16 03:25:15,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:25:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93809 proven. 6511 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-16 03:25:16,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262628486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:25:16,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:25:16,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 45 [2023-02-16 03:25:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429803553] [2023-02-16 03:25:16,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:25:16,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-16 03:25:16,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:25:16,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-16 03:25:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1499, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:25:16,699 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 45 states, 45 states have (on average 6.933333333333334) internal successors, (312), 45 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:25:18,833 INFO L93 Difference]: Finished difference Result 1592 states and 1653 transitions. [2023-02-16 03:25:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-02-16 03:25:18,833 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.933333333333334) internal successors, (312), 45 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1352 [2023-02-16 03:25:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:25:18,837 INFO L225 Difference]: With dead ends: 1592 [2023-02-16 03:25:18,837 INFO L226 Difference]: Without dead ends: 1592 [2023-02-16 03:25:18,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2836 GetRequests, 2663 SyntacticMatches, 25 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7404 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6106, Invalid=16244, Unknown=0, NotChecked=0, Total=22350 [2023-02-16 03:25:18,840 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:25:18,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 466 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:25:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-16 03:25:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-16 03:25:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0389692017598995) internal successors, (1653), 1591 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1653 transitions. [2023-02-16 03:25:18,854 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1653 transitions. Word has length 1352 [2023-02-16 03:25:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:25:18,855 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1653 transitions. [2023-02-16 03:25:18,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.933333333333334) internal successors, (312), 45 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1653 transitions. [2023-02-16 03:25:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1393 [2023-02-16 03:25:18,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:25:18,869 INFO L195 NwaCegarLoop]: trace histogram [249, 248, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-16 03:25:18,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-16 03:25:19,080 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,SelfDestructingSolverStorable37 [2023-02-16 03:25:19,081 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:25:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:25:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2061280083, now seen corresponding path program 14 times [2023-02-16 03:25:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:25:19,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814567046] [2023-02-16 03:25:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:25:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:25:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:25:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 105407 proven. 9279 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-16 03:25:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:25:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814567046] [2023-02-16 03:25:21,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814567046] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:25:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175183955] [2023-02-16 03:25:21,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:25:21,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:25:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:25:21,838 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) [2023-02-16 03:25:21,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-16 03:25:22,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:25:22,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:25:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 3970 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 03:25:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:25:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 106638 proven. 8048 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-16 03:25:23,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:25:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 106638 proven. 8048 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-16 03:25:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175183955] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:25:24,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:25:24,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 48 [2023-02-16 03:25:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283242126] [2023-02-16 03:25:24,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:25:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:25:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:25:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:25:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1711, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:25:24,263 INFO L87 Difference]: Start difference. First operand 1592 states and 1653 transitions. Second operand has 48 states, 48 states have (on average 6.958333333333333) internal successors, (334), 48 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:25:26,685 INFO L93 Difference]: Finished difference Result 1592 states and 1644 transitions. [2023-02-16 03:25:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-02-16 03:25:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.958333333333333) internal successors, (334), 48 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1392 [2023-02-16 03:25:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:25:26,689 INFO L225 Difference]: With dead ends: 1592 [2023-02-16 03:25:26,690 INFO L226 Difference]: Without dead ends: 1592 [2023-02-16 03:25:26,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2933 GetRequests, 2740 SyntacticMatches, 27 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9417 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7729, Invalid=20327, Unknown=0, NotChecked=0, Total=28056 [2023-02-16 03:25:26,693 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 102 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 03:25:26,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 294 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 03:25:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-16 03:25:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-16 03:25:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0333123821495915) internal successors, (1644), 1591 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1644 transitions. [2023-02-16 03:25:26,707 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1644 transitions. Word has length 1392 [2023-02-16 03:25:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:25:26,708 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1644 transitions. [2023-02-16 03:25:26,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.958333333333333) internal successors, (334), 48 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:25:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1644 transitions. [2023-02-16 03:25:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2023-02-16 03:25:26,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:25:26,723 INFO L195 NwaCegarLoop]: trace histogram [256, 255, 255, 255, 255, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-16 03:25:26,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-16 03:25:26,933 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,SelfDestructingSolverStorable38 [2023-02-16 03:25:26,933 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-16 03:25:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:25:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1973398196, now seen corresponding path program 15 times [2023-02-16 03:25:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:25:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232791232] [2023-02-16 03:25:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:25:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:25:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:25:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 117755 proven. 11213 refuted. 0 times theorem prover too weak. 40334 trivial. 0 not checked. [2023-02-16 03:25:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:25:29,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232791232] [2023-02-16 03:25:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232791232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:25:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570091806] [2023-02-16 03:25:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:25:29,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:25:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:25:29,838 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) [2023-02-16 03:25:29,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-16 03:25:31,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-16 03:25:31,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:25:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-16 03:25:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:25:31,458 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:25:31,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-16 03:25:35,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:25:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 0 proven. 27778 refuted. 0 times theorem prover too weak. 141524 trivial. 0 not checked. [2023-02-16 03:25:35,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:25:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 26579 proven. 1199 refuted. 0 times theorem prover too weak. 141524 trivial. 0 not checked. [2023-02-16 03:25:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570091806] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:25:37,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:25:37,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 83 [2023-02-16 03:25:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202666054] [2023-02-16 03:25:37,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:25:37,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-16 03:25:37,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:25:37,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-16 03:25:37,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=5817, Unknown=0, NotChecked=0, Total=6806 [2023-02-16 03:25:37,931 INFO L87 Difference]: Start difference. First operand 1592 states and 1644 transitions. Second operand has 83 states, 83 states have (on average 6.168674698795181) internal successors, (512), 83 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)