./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 e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/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-dev-e19ca92 [2021-12-22 16:35:15,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:35:15,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:35:15,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:35:15,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:35:15,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:35:15,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:35:15,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:35:15,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:35:15,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:35:15,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:35:15,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:35:15,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:35:15,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:35:15,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:35:15,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:35:15,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:35:15,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:35:15,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:35:15,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:35:15,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:35:15,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:35:15,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:35:15,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:35:15,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:35:15,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:35:15,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:35:15,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:35:15,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:35:15,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:35:15,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:35:15,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:35:15,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:35:15,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:35:15,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:35:15,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:35:15,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:35:15,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:35:15,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:35:15,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:35:15,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:35:15,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:35:16,029 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:35:16,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:35:16,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:35:16,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:35:16,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:35:16,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:35:16,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:35:16,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:35:16,045 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:35:16,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:35:16,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:35:16,046 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:35:16,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:35:16,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:35:16,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:35:16,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:35:16,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:35:16,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:35:16,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:35:16,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:35:16,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:35:16,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:35:16,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:35:16,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:35:16,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:35:16,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2021-12-22 16:35:16,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:35:16,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:35:16,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:35:16,257 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:35:16,258 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:35:16,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-12-22 16:35:16,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1af2bf1/afdb3b4b1a18449dbd45c701b44b5abb/FLAGf123406fc [2021-12-22 16:35:16,674 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:35:16,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-12-22 16:35:16,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1af2bf1/afdb3b4b1a18449dbd45c701b44b5abb/FLAGf123406fc [2021-12-22 16:35:17,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1af2bf1/afdb3b4b1a18449dbd45c701b44b5abb [2021-12-22 16:35:17,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:35:17,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:35:17,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:35:17,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:35:17,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:35:17,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517305f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17, skipping insertion in model container [2021-12-22 16:35:17,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:35:17,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:35:17,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:35:17,260 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:35:17,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:35:17,296 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:35:17,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17 WrapperNode [2021-12-22 16:35:17,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:35:17,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:35:17,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:35:17,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:35:17,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,336 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-12-22 16:35:17,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:35:17,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:35:17,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:35:17,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:35:17,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:35:17,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:35:17,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:35:17,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:35:17,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (1/1) ... [2021-12-22 16:35:17,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:35:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:17,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 16:35:17,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 16:35:17,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:35:17,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:35:17,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:35:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:35:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:35:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:35:17,489 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:35:17,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:35:17,637 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:35:17,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:35:17,642 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 16:35:17,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:17 BoogieIcfgContainer [2021-12-22 16:35:17,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:35:17,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:35:17,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:35:17,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:35:17,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:35:17" (1/3) ... [2021-12-22 16:35:17,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1dd0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:17, skipping insertion in model container [2021-12-22 16:35:17,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:17" (2/3) ... [2021-12-22 16:35:17,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1dd0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:17, skipping insertion in model container [2021-12-22 16:35:17,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:17" (3/3) ... [2021-12-22 16:35:17,657 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2021-12-22 16:35:17,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:35:17,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-22 16:35:17,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:35:17,714 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 16:35:17,714 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-22 16:35:17,727 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) [2021-12-22 16:35:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 16:35:17,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:17,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 16:35:17,733 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-22 16:35:17,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:17,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196964386] [2021-12-22 16:35:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:17,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:17,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:17,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196964386] [2021-12-22 16:35:17,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196964386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:17,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:35:17,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257842012] [2021-12-22 16:35:17,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:17,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:17,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:17,978 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) [2021-12-22 16:35:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,035 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-22 16:35:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:18,037 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 [2021-12-22 16:35:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,042 INFO L225 Difference]: With dead ends: 59 [2021-12-22 16:35:18,043 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 16:35:18,045 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:35:18,049 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:35:18,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 16:35:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-12-22 16:35:18,078 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) [2021-12-22 16:35:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-22 16:35:18,081 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-12-22 16:35:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,081 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-22 16:35:18,082 INFO L471 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) [2021-12-22 16:35:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-22 16:35:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:35:18,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:35:18,083 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-12-22 16:35:18,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:18,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22949754] [2021-12-22 16:35:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:18,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22949754] [2021-12-22 16:35:18,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22949754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:18,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:18,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:18,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14185597] [2021-12-22 16:35:18,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:18,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:35:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:35:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:35:18,154 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) [2021-12-22 16:35:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,198 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-22 16:35:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:18,199 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 [2021-12-22 16:35:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,200 INFO L225 Difference]: With dead ends: 58 [2021-12-22 16:35:18,200 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 16:35:18,201 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:35:18,203 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:35:18,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 16:35:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-22 16:35:18,210 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) [2021-12-22 16:35:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-22 16:35:18,213 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-22 16:35:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,213 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-22 16:35:18,213 INFO L471 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) [2021-12-22 16:35:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-22 16:35:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:35:18,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:35:18,216 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-12-22 16:35:18,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:18,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561316818] [2021-12-22 16:35:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:18,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:18,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561316818] [2021-12-22 16:35:18,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561316818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:18,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:18,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:18,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283862772] [2021-12-22 16:35:18,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:35:18,281 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) [2021-12-22 16:35:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,324 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-22 16:35:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:18,325 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 [2021-12-22 16:35:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,327 INFO L225 Difference]: With dead ends: 32 [2021-12-22 16:35:18,327 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 16:35:18,328 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:35:18,332 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:35:18,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 16:35:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-22 16:35:18,335 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) [2021-12-22 16:35:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-22 16:35:18,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-22 16:35:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,336 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-22 16:35:18,336 INFO L471 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) [2021-12-22 16:35:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-22 16:35:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:35:18,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:35:18,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-12-22 16:35:18,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:18,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134240273] [2021-12-22 16:35:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:18,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:18,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134240273] [2021-12-22 16:35:18,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134240273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:18,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:18,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:18,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465728172] [2021-12-22 16:35:18,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:18,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:18,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:35:18,409 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) [2021-12-22 16:35:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,462 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-22 16:35:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:35:18,463 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 [2021-12-22 16:35:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,464 INFO L225 Difference]: With dead ends: 55 [2021-12-22 16:35:18,464 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 16:35:18,464 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:35:18,465 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:18,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 16:35:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-22 16:35:18,469 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) [2021-12-22 16:35:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-22 16:35:18,469 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-22 16:35:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,470 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-22 16:35:18,470 INFO L471 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) [2021-12-22 16:35:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-22 16:35:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:35:18,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:35:18,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-22 16:35:18,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812880932] [2021-12-22 16:35:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:18,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:18,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812880932] [2021-12-22 16:35:18,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812880932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:18,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:18,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:35:18,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178221068] [2021-12-22 16:35:18,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:18,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:18,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:18,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:18,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:35:18,512 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2021-12-22 16:35:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,562 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-22 16:35:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:18,563 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 [2021-12-22 16:35:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,564 INFO L225 Difference]: With dead ends: 60 [2021-12-22 16:35:18,564 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 16:35:18,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:35:18,565 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:18,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 16:35:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-12-22 16:35:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 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) [2021-12-22 16:35:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-22 16:35:18,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2021-12-22 16:35:18,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,570 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-22 16:35:18,570 INFO L471 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) [2021-12-22 16:35:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-22 16:35:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:35:18,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:35:18,571 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-12-22 16:35:18,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:18,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322325507] [2021-12-22 16:35:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:18,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:18,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322325507] [2021-12-22 16:35:18,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322325507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:18,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811817266] [2021-12-22 16:35:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:18,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:18,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:18,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:18,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:35:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:18,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:35:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:18,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811817266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:18,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:18,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-22 16:35:18,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9134357] [2021-12-22 16:35:18,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:18,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:35:18,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:18,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:35:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:35:18,822 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:18,878 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-12-22 16:35:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:35:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:18,885 INFO L225 Difference]: With dead ends: 130 [2021-12-22 16:35:18,885 INFO L226 Difference]: Without dead ends: 130 [2021-12-22 16:35:18,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:35:18,888 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:18,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-22 16:35:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2021-12-22 16:35:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-22 16:35:18,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2021-12-22 16:35:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:18,901 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-22 16:35:18,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-22 16:35:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:35:18,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:18,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:18,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:19,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 16:35:19,112 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-12-22 16:35:19,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932722139] [2021-12-22 16:35:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:19,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:19,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932722139] [2021-12-22 16:35:19,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932722139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114619410] [2021-12-22 16:35:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:19,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:19,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:19,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:35:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:19,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 16:35:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:19,304 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:19,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:35:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:19,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:19,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114619410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:19,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:19,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-22 16:35:19,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958730322] [2021-12-22 16:35:19,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:19,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:35:19,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:35:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:19,517 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2021-12-22 16:35:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:19,697 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2021-12-22 16:35:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 16:35:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 11 [2021-12-22 16:35:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:19,698 INFO L225 Difference]: With dead ends: 129 [2021-12-22 16:35:19,698 INFO L226 Difference]: Without dead ends: 129 [2021-12-22 16:35:19,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:35:19,700 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:19,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-22 16:35:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2021-12-22 16:35:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-22 16:35:19,705 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2021-12-22 16:35:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:19,706 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-22 16:35:19,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2021-12-22 16:35:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-22 16:35:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 16:35:19,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:19,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:19,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:19,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-22 16:35:19,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2021-12-22 16:35:19,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:19,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435064656] [2021-12-22 16:35:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:19,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:19,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435064656] [2021-12-22 16:35:19,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435064656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534778627] [2021-12-22 16:35:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:19,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:19,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:19,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:19,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:35:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:35:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:20,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:20,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534778627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:20,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:20,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-22 16:35:20,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474359843] [2021-12-22 16:35:20,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:20,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:35:20,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:35:20,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:35:20,091 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:20,200 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-12-22 16:35:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:35:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-22 16:35:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:20,201 INFO L225 Difference]: With dead ends: 88 [2021-12-22 16:35:20,201 INFO L226 Difference]: Without dead ends: 88 [2021-12-22 16:35:20,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:35:20,202 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:20,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 52 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-22 16:35:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2021-12-22 16:35:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-22 16:35:20,205 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2021-12-22 16:35:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:20,205 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-22 16:35:20,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-22 16:35:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:35:20,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:20,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:20,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:20,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:20,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2021-12-22 16:35:20,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:20,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964719482] [2021-12-22 16:35:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:20,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 16:35:20,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:20,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964719482] [2021-12-22 16:35:20,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964719482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:20,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:20,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:35:20,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214877237] [2021-12-22 16:35:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:20,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:35:20,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:35:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:35:20,488 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:20,500 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-12-22 16:35:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:20,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2021-12-22 16:35:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:20,501 INFO L225 Difference]: With dead ends: 46 [2021-12-22 16:35:20,501 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 16:35:20,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:35:20,501 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:20,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 16:35:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-22 16:35:20,503 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) [2021-12-22 16:35:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-22 16:35:20,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2021-12-22 16:35:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:20,503 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-22 16:35:20,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-22 16:35:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:35:20,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:20,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:20,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 16:35:20,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2021-12-22 16:35:20,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:20,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056661281] [2021-12-22 16:35:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:20,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:20,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056661281] [2021-12-22 16:35:20,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056661281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:20,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:35:20,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:35:20,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151335432] [2021-12-22 16:35:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:20,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:20,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:35:20,565 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) [2021-12-22 16:35:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:20,589 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-12-22 16:35:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:35:20,590 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 [2021-12-22 16:35:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:20,590 INFO L225 Difference]: With dead ends: 76 [2021-12-22 16:35:20,590 INFO L226 Difference]: Without dead ends: 76 [2021-12-22 16:35:20,590 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:35:20,591 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:20,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-22 16:35:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-12-22 16:35:20,592 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) [2021-12-22 16:35:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-22 16:35:20,593 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2021-12-22 16:35:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-22 16:35:20,593 INFO L471 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) [2021-12-22 16:35:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-22 16:35:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:35:20,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:20,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:20,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:35:20,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2021-12-22 16:35:20,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:20,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663772287] [2021-12-22 16:35:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:20,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:20,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:20,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663772287] [2021-12-22 16:35:20,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663772287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:20,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092540874] [2021-12-22 16:35:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:20,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:20,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:20,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:35:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:35:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:20,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:20,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-22 16:35:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:21,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092540874] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:21,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:21,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 16:35:21,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175350103] [2021-12-22 16:35:21,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:21,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:35:21,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:21,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:35:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:35:21,005 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) [2021-12-22 16:35:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:21,074 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-12-22 16:35:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:35:21,074 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 [2021-12-22 16:35:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:21,075 INFO L225 Difference]: With dead ends: 80 [2021-12-22 16:35:21,075 INFO L226 Difference]: Without dead ends: 80 [2021-12-22 16:35:21,075 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:35:21,075 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:21,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 41 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-22 16:35:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-12-22 16:35:21,077 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) [2021-12-22 16:35:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-12-22 16:35:21,078 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2021-12-22 16:35:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-12-22 16:35:21,078 INFO L471 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) [2021-12-22 16:35:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-12-22 16:35:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:35:21,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:21,078 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-22 16:35:21,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:21,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:21,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-12-22 16:35:21,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408900453] [2021-12-22 16:35:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:21,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 16:35:21,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408900453] [2021-12-22 16:35:21,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408900453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252126194] [2021-12-22 16:35:21,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:21,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:21,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:21,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:21,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:35:21,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:21,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:35:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:21,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:21,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252126194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:21,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:21,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-22 16:35:21,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986227645] [2021-12-22 16:35:21,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:35:21,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:35:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:35:21,508 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) [2021-12-22 16:35:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:21,581 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-12-22 16:35:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:35:21,581 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 [2021-12-22 16:35:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:21,582 INFO L225 Difference]: With dead ends: 86 [2021-12-22 16:35:21,582 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 16:35:21,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:35:21,583 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:21,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 16:35:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-12-22 16:35:21,585 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) [2021-12-22 16:35:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-12-22 16:35:21,586 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2021-12-22 16:35:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:21,586 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-12-22 16:35:21,586 INFO L471 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) [2021-12-22 16:35:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-12-22 16:35:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:35:21,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:21,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:21,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:21,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 16:35:21,823 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2021-12-22 16:35:21,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711339982] [2021-12-22 16:35:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:21,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:21,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711339982] [2021-12-22 16:35:21,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711339982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948336305] [2021-12-22 16:35:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:21,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:21,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:21,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:35:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:21,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:35:21,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 16:35:22,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:22,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948336305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:22,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:22,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 16:35:22,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256591774] [2021-12-22 16:35:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:22,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:22,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:35:22,281 INFO L87 Difference]: Start difference. First operand 61 states and 66 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) [2021-12-22 16:35:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:22,282 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-12-22 16:35:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:22,282 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 26 [2021-12-22 16:35:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:22,282 INFO L225 Difference]: With dead ends: 62 [2021-12-22 16:35:22,282 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 16:35:22,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:35:22,283 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:22,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-22 16:35:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 16:35:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 16:35:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-22 16:35:22,285 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2021-12-22 16:35:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:22,285 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-22 16:35:22,285 INFO L471 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) [2021-12-22 16:35:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-22 16:35:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:35:22,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:22,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:22,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:22,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:22,495 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2021-12-22 16:35:22,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321168206] [2021-12-22 16:35:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:22,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 16:35:22,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321168206] [2021-12-22 16:35:22,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321168206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418321659] [2021-12-22 16:35:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:22,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:22,539 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) [2021-12-22 16:35:22,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:35:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:35:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:22,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:35:22,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:35:22,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:35:22,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-22 16:35:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:22,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:22,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-22 16:35:22,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-22 16:35:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:23,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418321659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:23,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:23,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2021-12-22 16:35:23,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445426771] [2021-12-22 16:35:23,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:23,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 16:35:23,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 16:35:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:35:23,005 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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) [2021-12-22 16:35:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:23,277 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-12-22 16:35:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:35:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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) Word has length 27 [2021-12-22 16:35:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:23,279 INFO L225 Difference]: With dead ends: 101 [2021-12-22 16:35:23,279 INFO L226 Difference]: Without dead ends: 101 [2021-12-22 16:35:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2021-12-22 16:35:23,280 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:23,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 156 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:35:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-22 16:35:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2021-12-22 16:35:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 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) [2021-12-22 16:35:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-22 16:35:23,284 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2021-12-22 16:35:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:23,285 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-22 16:35:23,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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) [2021-12-22 16:35:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-22 16:35:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 16:35:23,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:23,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:23,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:23,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:23,500 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2021-12-22 16:35:23,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:23,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085953816] [2021-12-22 16:35:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:23,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:23,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:23,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085953816] [2021-12-22 16:35:23,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085953816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:23,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985651472] [2021-12-22 16:35:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:23,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:23,568 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) [2021-12-22 16:35:23,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:35:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:23,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:35:23,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:23,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:35:23,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985651472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:23,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:23,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-12-22 16:35:23,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347306577] [2021-12-22 16:35:23,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:23,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:35:23,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:23,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:35:23,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:35:23,814 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2021-12-22 16:35:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:23,988 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-12-22 16:35:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 16:35:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) Word has length 34 [2021-12-22 16:35:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:23,990 INFO L225 Difference]: With dead ends: 66 [2021-12-22 16:35:23,990 INFO L226 Difference]: Without dead ends: 66 [2021-12-22 16:35:23,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:35:23,993 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:23,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 71 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-22 16:35:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-22 16:35:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-12-22 16:35:23,997 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2021-12-22 16:35:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:23,998 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-12-22 16:35:23,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2021-12-22 16:35:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-12-22 16:35:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 16:35:24,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:24,002 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:24,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:24,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 16:35:24,221 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2021-12-22 16:35:24,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:24,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902719559] [2021-12-22 16:35:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:24,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:24,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902719559] [2021-12-22 16:35:24,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902719559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050835940] [2021-12-22 16:35:24,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:24,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:24,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:24,372 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) [2021-12-22 16:35:24,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:35:24,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:24,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:24,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 16:35:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:24,474 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:24,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:35:24,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:24,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050835940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:24,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:24,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2021-12-22 16:35:24,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589436681] [2021-12-22 16:35:24,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:24,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:35:24,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:35:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:35:24,969 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2021-12-22 16:35:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:25,105 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-12-22 16:35:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:35:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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 [2021-12-22 16:35:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:25,107 INFO L225 Difference]: With dead ends: 158 [2021-12-22 16:35:25,107 INFO L226 Difference]: Without dead ends: 158 [2021-12-22 16:35:25,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:35:25,107 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:25,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-22 16:35:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-12-22 16:35:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2021-12-22 16:35:25,111 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2021-12-22 16:35:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:25,111 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2021-12-22 16:35:25,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2021-12-22 16:35:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2021-12-22 16:35:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 16:35:25,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:25,112 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:25,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:25,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 16:35:25,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2021-12-22 16:35:25,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:25,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075962701] [2021-12-22 16:35:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:25,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 16:35:25,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:25,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075962701] [2021-12-22 16:35:25,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075962701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:25,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998817832] [2021-12-22 16:35:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:25,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:25,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:25,415 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) [2021-12-22 16:35:25,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:35:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:35:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 16:35:25,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 16:35:25,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998817832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:25,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:25,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2021-12-22 16:35:25,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170191211] [2021-12-22 16:35:25,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:25,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:35:25,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:35:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:35:25,649 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:25,820 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2021-12-22 16:35:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 16:35:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-12-22 16:35:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:25,821 INFO L225 Difference]: With dead ends: 165 [2021-12-22 16:35:25,821 INFO L226 Difference]: Without dead ends: 165 [2021-12-22 16:35:25,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:35:25,822 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:25,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 67 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-22 16:35:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2021-12-22 16:35:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2021-12-22 16:35:25,824 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2021-12-22 16:35:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:25,824 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2021-12-22 16:35:25,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2021-12-22 16:35:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 16:35:25,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:25,825 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:25,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:26,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 16:35:26,035 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2021-12-22 16:35:26,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:26,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214263989] [2021-12-22 16:35:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:26,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:26,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214263989] [2021-12-22 16:35:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214263989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22328675] [2021-12-22 16:35:26,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:26,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:26,123 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) [2021-12-22 16:35:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:35:26,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:35:26,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:26,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:26,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-22 16:35:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:26,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22328675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:26,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:26,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2021-12-22 16:35:26,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774782526] [2021-12-22 16:35:26,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:26,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:35:26,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:35:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:35:26,629 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:26,719 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2021-12-22 16:35:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:35:26,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 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 49 [2021-12-22 16:35:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:26,728 INFO L225 Difference]: With dead ends: 146 [2021-12-22 16:35:26,728 INFO L226 Difference]: Without dead ends: 146 [2021-12-22 16:35:26,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:35:26,728 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 216 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:26,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 80 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-22 16:35:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-12-22 16:35:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.129496402877698) internal successors, (157), 143 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2021-12-22 16:35:26,731 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 49 [2021-12-22 16:35:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:26,731 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2021-12-22 16:35:26,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2021-12-22 16:35:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 16:35:26,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:26,732 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-22 16:35:26,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 16:35:26,943 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1256352513, now seen corresponding path program 3 times [2021-12-22 16:35:26,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:26,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083098831] [2021-12-22 16:35:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:26,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-22 16:35:27,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083098831] [2021-12-22 16:35:27,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083098831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027863471] [2021-12-22 16:35:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:35:27,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:27,047 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) [2021-12-22 16:35:27,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:35:27,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:35:27,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 16:35:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:35:27,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-22 16:35:27,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:27,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-12-22 16:35:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-22 16:35:27,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:27,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027863471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:27,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:27,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-12-22 16:35:27,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817573665] [2021-12-22 16:35:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:27,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:35:27,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:35:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:27,388 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:27,417 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2021-12-22 16:35:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:35:27,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-22 16:35:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:27,418 INFO L225 Difference]: With dead ends: 142 [2021-12-22 16:35:27,419 INFO L226 Difference]: Without dead ends: 142 [2021-12-22 16:35:27,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:27,419 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:27,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-22 16:35:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2021-12-22 16:35:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.077922077922078) internal successors, (83), 79 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) [2021-12-22 16:35:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-12-22 16:35:27,421 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 53 [2021-12-22 16:35:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:27,422 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-12-22 16:35:27,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-12-22 16:35:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 16:35:27,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:27,422 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:27,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:27,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:27,639 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash -292223690, now seen corresponding path program 1 times [2021-12-22 16:35:27,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:27,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812211980] [2021-12-22 16:35:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:27,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-22 16:35:27,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:27,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812211980] [2021-12-22 16:35:27,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812211980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:27,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000696929] [2021-12-22 16:35:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:27,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:27,700 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) [2021-12-22 16:35:27,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:35:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:27,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 16:35:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:27,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 16:35:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:35:28,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 16:35:28,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:35:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 16:35:28,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:30,269 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) is different from false [2021-12-22 16:35:30,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-22 16:35:30,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2021-12-22 16:35:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2021-12-22 16:35:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000696929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:30,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 25 [2021-12-22 16:35:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459145741] [2021-12-22 16:35:30,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:30,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 16:35:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 16:35:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=451, Unknown=1, NotChecked=44, Total=600 [2021-12-22 16:35:30,492 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:32,578 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (<= 2 |c_ULTIMATE.start_main_#t~ret3#1|) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_foo_#res#1|) (= |c_ULTIMATE.start_main_~i~1#1| 0) (<= 2 |c_ULTIMATE.start_foo_~i~0#1|)) is different from false [2021-12-22 16:35:34,581 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~1#1| 0)) is different from false [2021-12-22 16:35:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:34,643 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-12-22 16:35:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:35:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 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 54 [2021-12-22 16:35:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:34,644 INFO L225 Difference]: With dead ends: 71 [2021-12-22 16:35:34,644 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 16:35:34,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=148, Invalid=563, Unknown=3, NotChecked=156, Total=870 [2021-12-22 16:35:34,646 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:34,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-12-22 16:35:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 16:35:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-22 16:35:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-12-22 16:35:34,648 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 54 [2021-12-22 16:35:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-12-22 16:35:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-12-22 16:35:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 16:35:34,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:34,649 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-22 16:35:34,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:34,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-22 16:35:34,859 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2021-12-22 16:35:34,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732729880] [2021-12-22 16:35:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:34,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 16:35:34,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732729880] [2021-12-22 16:35:34,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732729880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883926915] [2021-12-22 16:35:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:34,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:34,960 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) [2021-12-22 16:35:34,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 16:35:35,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:35,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:35:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:35,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 16:35:35,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883926915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:35,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:35,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2021-12-22 16:35:35,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787189218] [2021-12-22 16:35:35,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:35,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 16:35:35,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 16:35:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:35:35,352 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:35,695 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2021-12-22 16:35:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 16:35:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2021-12-22 16:35:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:35,696 INFO L225 Difference]: With dead ends: 108 [2021-12-22 16:35:35,696 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 16:35:35,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 16:35:35,697 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:35,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 73 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:35:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 16:35:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-22 16:35:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-12-22 16:35:35,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 64 [2021-12-22 16:35:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:35,699 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-12-22 16:35:35,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-12-22 16:35:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 16:35:35,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:35,699 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-22 16:35:35,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:35,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:35,900 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2021-12-22 16:35:35,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:35,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120934038] [2021-12-22 16:35:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:35,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-22 16:35:35,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120934038] [2021-12-22 16:35:35,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120934038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695924071] [2021-12-22 16:35:35,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:35:35,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:35,978 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) [2021-12-22 16:35:35,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 16:35:36,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-22 16:35:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:35:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-22 16:35:36,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-22 16:35:36,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695924071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:36,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:36,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-22 16:35:36,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302277935] [2021-12-22 16:35:36,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:36,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 16:35:36,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 16:35:36,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:35:36,408 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) [2021-12-22 16:35:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:36,593 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-12-22 16:35:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:35:36,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) Word has length 91 [2021-12-22 16:35:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:36,612 INFO L225 Difference]: With dead ends: 164 [2021-12-22 16:35:36,612 INFO L226 Difference]: Without dead ends: 164 [2021-12-22 16:35:36,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:35:36,613 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:36,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 99 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-22 16:35:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2021-12-22 16:35:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 122 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2021-12-22 16:35:36,616 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 91 [2021-12-22 16:35:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:36,616 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2021-12-22 16:35:36,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) [2021-12-22 16:35:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2021-12-22 16:35:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 16:35:36,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:36,617 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-22 16:35:36,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:36,827 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2021-12-22 16:35:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823872690] [2021-12-22 16:35:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:36,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-22 16:35:36,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823872690] [2021-12-22 16:35:36,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823872690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:36,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510190281] [2021-12-22 16:35:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:36,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:36,942 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) [2021-12-22 16:35:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 16:35:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 16:35:37,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:37,042 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:37,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:35:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-22 16:35:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-22 16:35:37,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510190281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:37,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:37,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-12-22 16:35:37,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631454287] [2021-12-22 16:35:37,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:37,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 16:35:37,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 16:35:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:35:37,933 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:38,282 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-12-22 16:35:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:35:38,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 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 [2021-12-22 16:35:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:38,283 INFO L225 Difference]: With dead ends: 160 [2021-12-22 16:35:38,283 INFO L226 Difference]: Without dead ends: 160 [2021-12-22 16:35:38,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:35:38,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 224 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:38,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 90 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:35:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-22 16:35:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2021-12-22 16:35:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 123 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2021-12-22 16:35:38,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 92 [2021-12-22 16:35:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2021-12-22 16:35:38,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2021-12-22 16:35:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-22 16:35:38,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:38,288 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-22 16:35:38,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:38,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 16:35:38,506 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2021-12-22 16:35:38,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:38,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896955033] [2021-12-22 16:35:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:38,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 470 proven. 378 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-22 16:35:38,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896955033] [2021-12-22 16:35:38,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896955033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922536289] [2021-12-22 16:35:38,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 16:35:38,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:38,674 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) [2021-12-22 16:35:38,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 16:35:38,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 16:35:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:35:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-22 16:35:39,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-22 16:35:39,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922536289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:39,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:39,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2021-12-22 16:35:39,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356591655] [2021-12-22 16:35:39,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 16:35:39,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:39,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 16:35:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 16:35:39,580 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 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) [2021-12-22 16:35:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:41,150 INFO L93 Difference]: Finished difference Result 371 states and 404 transitions. [2021-12-22 16:35:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-22 16:35:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 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 121 [2021-12-22 16:35:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:41,152 INFO L225 Difference]: With dead ends: 371 [2021-12-22 16:35:41,153 INFO L226 Difference]: Without dead ends: 371 [2021-12-22 16:35:41,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2257, Invalid=8045, Unknown=0, NotChecked=0, Total=10302 [2021-12-22 16:35:41,157 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 536 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:41,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 109 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:35:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-22 16:35:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 354. [2021-12-22 16:35:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0994318181818181) internal successors, (387), 353 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 387 transitions. [2021-12-22 16:35:41,164 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 387 transitions. Word has length 121 [2021-12-22 16:35:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:41,165 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 387 transitions. [2021-12-22 16:35:41,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 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) [2021-12-22 16:35:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 387 transitions. [2021-12-22 16:35:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-22 16:35:41,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:41,169 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:35:41,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-22 16:35:41,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:41,379 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 5 times [2021-12-22 16:35:41,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220424151] [2021-12-22 16:35:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:41,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3266 proven. 218 refuted. 0 times theorem prover too weak. 1898 trivial. 0 not checked. [2021-12-22 16:35:41,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:41,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220424151] [2021-12-22 16:35:41,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220424151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:41,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510115368] [2021-12-22 16:35:41,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 16:35:41,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:41,658 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) [2021-12-22 16:35:41,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 16:35:41,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-22 16:35:41,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:35:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3117 proven. 501 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-12-22 16:35:42,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3230 proven. 388 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-12-22 16:35:42,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510115368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:42,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:42,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2021-12-22 16:35:42,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202045574] [2021-12-22 16:35:42,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:42,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 16:35:42,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:42,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 16:35:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 16:35:42,902 INFO L87 Difference]: Start difference. First operand 354 states and 387 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:43,657 INFO L93 Difference]: Finished difference Result 354 states and 369 transitions. [2021-12-22 16:35:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 16:35:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 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 281 [2021-12-22 16:35:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:43,659 INFO L225 Difference]: With dead ends: 354 [2021-12-22 16:35:43,659 INFO L226 Difference]: Without dead ends: 354 [2021-12-22 16:35:43,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2021-12-22 16:35:43,664 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 151 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:43,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 99 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:35:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-22 16:35:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2021-12-22 16:35:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0482954545454546) internal successors, (369), 353 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 369 transitions. [2021-12-22 16:35:43,679 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 369 transitions. Word has length 281 [2021-12-22 16:35:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:43,679 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 369 transitions. [2021-12-22 16:35:43,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 369 transitions. [2021-12-22 16:35:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-22 16:35:43,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:43,682 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:35:43,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-22 16:35:43,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:43,903 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 6 times [2021-12-22 16:35:43,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017358582] [2021-12-22 16:35:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:43,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2021-12-22 16:35:44,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017358582] [2021-12-22 16:35:44,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017358582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840865788] [2021-12-22 16:35:44,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 16:35:44,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:44,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:44,269 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) [2021-12-22 16:35:44,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 16:35:44,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-22 16:35:44,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:35:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-12-22 16:35:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-12-22 16:35:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840865788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:45,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 36 [2021-12-22 16:35:45,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337812337] [2021-12-22 16:35:45,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:45,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 16:35:45,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 16:35:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 16:35:45,768 INFO L87 Difference]: Start difference. First operand 354 states and 369 transitions. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:46,955 INFO L93 Difference]: Finished difference Result 354 states and 365 transitions. [2021-12-22 16:35:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-22 16:35:46,955 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 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 [2021-12-22 16:35:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:46,956 INFO L225 Difference]: With dead ends: 354 [2021-12-22 16:35:46,956 INFO L226 Difference]: Without dead ends: 354 [2021-12-22 16:35:46,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=899, Invalid=3793, Unknown=0, NotChecked=0, Total=4692 [2021-12-22 16:35:46,958 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:46,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 109 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 16:35:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-22 16:35:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2021-12-22 16:35:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0369318181818181) internal successors, (365), 353 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 365 transitions. [2021-12-22 16:35:46,962 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 365 transitions. Word has length 301 [2021-12-22 16:35:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:46,962 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 365 transitions. [2021-12-22 16:35:46,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 365 transitions. [2021-12-22 16:35:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-22 16:35:46,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:46,965 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:35:47,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-22 16:35:47,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:47,187 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 7 times [2021-12-22 16:35:47,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877412552] [2021-12-22 16:35:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:47,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2021-12-22 16:35:47,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877412552] [2021-12-22 16:35:47,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877412552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86718971] [2021-12-22 16:35:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 16:35:47,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:47,511 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) [2021-12-22 16:35:47,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 16:35:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:47,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:35:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-12-22 16:35:48,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-12-22 16:35:48,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86718971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:48,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2021-12-22 16:35:48,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154187706] [2021-12-22 16:35:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:48,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-22 16:35:48,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-22 16:35:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 16:35:48,902 INFO L87 Difference]: Start difference. First operand 354 states and 365 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:50,650 INFO L93 Difference]: Finished difference Result 406 states and 414 transitions. [2021-12-22 16:35:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-22 16:35:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 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 [2021-12-22 16:35:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:50,652 INFO L225 Difference]: With dead ends: 406 [2021-12-22 16:35:50,652 INFO L226 Difference]: Without dead ends: 406 [2021-12-22 16:35:50,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2021-12-22 16:35:50,654 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:50,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 217 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 16:35:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-22 16:35:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 396. [2021-12-22 16:35:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.0253807106598984) internal successors, (404), 395 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 404 transitions. [2021-12-22 16:35:50,659 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 404 transitions. Word has length 316 [2021-12-22 16:35:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:50,660 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 404 transitions. [2021-12-22 16:35:50,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 404 transitions. [2021-12-22 16:35:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-22 16:35:50,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:50,663 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:35:50,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:50,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 16:35:50,877 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 8 times [2021-12-22 16:35:50,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:50,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698235311] [2021-12-22 16:35:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:50,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4817 proven. 542 refuted. 0 times theorem prover too weak. 2273 trivial. 0 not checked. [2021-12-22 16:35:51,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698235311] [2021-12-22 16:35:51,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698235311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395572512] [2021-12-22 16:35:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:51,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:51,273 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) [2021-12-22 16:35:51,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-22 16:35:51,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:51,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 16:35:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-12-22 16:35:52,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-12-22 16:35:52,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395572512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:52,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:52,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2021-12-22 16:35:52,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39624006] [2021-12-22 16:35:52,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:52,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 16:35:52,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:52,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 16:35:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 16:35:52,791 INFO L87 Difference]: Start difference. First operand 396 states and 404 transitions. Second operand has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:54,712 INFO L93 Difference]: Finished difference Result 453 states and 459 transitions. [2021-12-22 16:35:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-22 16:35:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 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 326 [2021-12-22 16:35:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:54,714 INFO L225 Difference]: With dead ends: 453 [2021-12-22 16:35:54,714 INFO L226 Difference]: Without dead ends: 453 [2021-12-22 16:35:54,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2021-12-22 16:35:54,716 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 165 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:54,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 139 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 16:35:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-22 16:35:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 443. [2021-12-22 16:35:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 441 states have (on average 1.018140589569161) internal successors, (449), 442 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 449 transitions. [2021-12-22 16:35:54,734 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 449 transitions. Word has length 326 [2021-12-22 16:35:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:54,734 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 449 transitions. [2021-12-22 16:35:54,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 449 transitions. [2021-12-22 16:35:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-22 16:35:54,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:54,736 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:35:54,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:54,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-22 16:35:54,936 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 9 times [2021-12-22 16:35:54,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:54,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143115292] [2021-12-22 16:35:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:54,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2021-12-22 16:35:55,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:55,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143115292] [2021-12-22 16:35:55,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143115292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:55,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437732113] [2021-12-22 16:35:55,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:35:55,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:55,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:55,255 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) [2021-12-22 16:35:55,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-22 16:35:55,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 16:35:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:35:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2021-12-22 16:35:55,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2021-12-22 16:35:56,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437732113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:56,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:56,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 49 [2021-12-22 16:35:56,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106494397] [2021-12-22 16:35:56,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:56,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 16:35:56,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 16:35:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1769, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 16:35:56,517 INFO L87 Difference]: Start difference. First operand 443 states and 449 transitions. Second operand has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 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) [2021-12-22 16:35:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:58,330 INFO L93 Difference]: Finished difference Result 699 states and 718 transitions. [2021-12-22 16:35:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-22 16:35:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 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 331 [2021-12-22 16:35:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:58,333 INFO L225 Difference]: With dead ends: 699 [2021-12-22 16:35:58,333 INFO L226 Difference]: Without dead ends: 699 [2021-12-22 16:35:58,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3586, Invalid=9754, Unknown=0, NotChecked=0, Total=13340 [2021-12-22 16:35:58,337 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1277 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:58,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 118 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:35:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-22 16:35:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 502. [2021-12-22 16:35:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.062) internal successors, (531), 501 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 531 transitions. [2021-12-22 16:35:58,344 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 531 transitions. Word has length 331 [2021-12-22 16:35:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:58,344 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 531 transitions. [2021-12-22 16:35:58,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 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) [2021-12-22 16:35:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 531 transitions. [2021-12-22 16:35:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-22 16:35:58,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:58,346 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:35:58,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-22 16:35:58,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 16:35:58,564 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1489328682, now seen corresponding path program 2 times [2021-12-22 16:35:58,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:58,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220762861] [2021-12-22 16:35:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:58,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 5854 proven. 408 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2021-12-22 16:35:58,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:58,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220762861] [2021-12-22 16:35:58,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220762861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:58,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409923517] [2021-12-22 16:35:58,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:58,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:58,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:58,943 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) [2021-12-22 16:35:58,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 16:35:59,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:35:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 16:35:59,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:59,084 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:59,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:36:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 10 proven. 2526 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2021-12-22 16:36:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:36:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 0 proven. 2536 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2021-12-22 16:36:01,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409923517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:36:01,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:36:01,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2021-12-22 16:36:01,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799009054] [2021-12-22 16:36:01,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:36:01,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 16:36:01,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:36:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 16:36:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:36:01,443 INFO L87 Difference]: Start difference. First operand 502 states and 531 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:36:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:36:02,482 INFO L93 Difference]: Finished difference Result 501 states and 517 transitions. [2021-12-22 16:36:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 16:36:02,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 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 342 [2021-12-22 16:36:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:36:02,484 INFO L225 Difference]: With dead ends: 501 [2021-12-22 16:36:02,484 INFO L226 Difference]: Without dead ends: 501 [2021-12-22 16:36:02,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2021-12-22 16:36:02,485 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 618 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:36:02,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 42 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:36:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-22 16:36:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 449. [2021-12-22 16:36:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0379464285714286) internal successors, (465), 448 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:36:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 465 transitions. [2021-12-22 16:36:02,493 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 465 transitions. Word has length 342 [2021-12-22 16:36:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:36:02,494 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 465 transitions. [2021-12-22 16:36:02,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:36:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 465 transitions. [2021-12-22 16:36:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-22 16:36:02,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:36:02,495 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 70, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-22 16:36:02,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-22 16:36:02,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:36:02,703 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:36:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:36:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash -935388728, now seen corresponding path program 10 times [2021-12-22 16:36:02,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:36:02,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824114110] [2021-12-22 16:36:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:36:02,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:36:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:36:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6122 proven. 217 refuted. 0 times theorem prover too weak. 6648 trivial. 0 not checked. [2021-12-22 16:36:02,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:36:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824114110] [2021-12-22 16:36:02,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824114110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:36:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223713685] [2021-12-22 16:36:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 16:36:02,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:36:02,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:36:02,978 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) [2021-12-22 16:36:02,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-22 16:36:03,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 16:36:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:36:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 16:36:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:36:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-12-22 16:36:04,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:36:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-12-22 16:36:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223713685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:36:05,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:36:05,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2021-12-22 16:36:05,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714571064] [2021-12-22 16:36:05,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:36:05,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 16:36:05,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:36:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 16:36:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 16:36:05,011 INFO L87 Difference]: Start difference. First operand 449 states and 465 transitions. Second operand has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:36:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:36:05,838 INFO L93 Difference]: Finished difference Result 449 states and 464 transitions. [2021-12-22 16:36:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-22 16:36:05,839 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 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 411 [2021-12-22 16:36:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:36:05,840 INFO L225 Difference]: With dead ends: 449 [2021-12-22 16:36:05,840 INFO L226 Difference]: Without dead ends: 449 [2021-12-22 16:36:05,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1098, Invalid=4304, Unknown=0, NotChecked=0, Total=5402 [2021-12-22 16:36:05,841 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 552 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:36:05,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 100 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:36:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-12-22 16:36:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2021-12-22 16:36:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0357142857142858) internal successors, (464), 448 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:36:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 464 transitions. [2021-12-22 16:36:05,846 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 464 transitions. Word has length 411 [2021-12-22 16:36:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:36:05,846 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 464 transitions. [2021-12-22 16:36:05,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:36:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 464 transitions. [2021-12-22 16:36:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-12-22 16:36:05,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:36:05,848 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-22 16:36:05,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-22 16:36:06,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:36:06,063 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:36:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:36:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 11 times [2021-12-22 16:36:06,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:36:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491642086] [2021-12-22 16:36:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:36:06,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:36:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:36:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 7790 proven. 1983 refuted. 0 times theorem prover too weak. 5583 trivial. 0 not checked. [2021-12-22 16:36:06,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:36:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491642086] [2021-12-22 16:36:06,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491642086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:36:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347525021] [2021-12-22 16:36:06,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 16:36:06,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:36:06,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:36:06,511 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) [2021-12-22 16:36:06,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-22 16:36:07,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-22 16:36:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:36:07,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-22 16:36:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:36:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2150 proven. 12344 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2021-12-22 16:36:08,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:36:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2107 proven. 12387 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2021-12-22 16:36:10,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347525021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:36:10,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:36:10,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 39] total 87 [2021-12-22 16:36:10,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560341725] [2021-12-22 16:36:10,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:36:10,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-22 16:36:10,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:36:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-22 16:36:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=5965, Unknown=0, NotChecked=0, Total=7482 [2021-12-22 16:36:10,013 INFO L87 Difference]: Start difference. First operand 449 states and 464 transitions. Second operand has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)